[OLINGO-713] Added tutorial project for system query options - expand/select
This commit is contained in:
Michael Bolz
parent
3dae763f35
commit
b477bde07b
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@ -23,7 +23,7 @@
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>my.group.id</groupId>
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<artifactId>DemoService-QueryOptions</artifactId>
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<artifactId>DemoService-QueryOptions-TIS</artifactId>
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<packaging>war</packaging>
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<version>0.0.1</version>
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@ -0,0 +1,80 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>my.group.id</groupId>
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<artifactId>DemoService-QueryOptions-ES</artifactId>
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<packaging>war</packaging>
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<version>0.0.1</version>
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<name>${project.artifactId}-Webapp</name>
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<build>
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<finalName>DemoService</finalName>
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</build>
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<properties>
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<javax.version>2.5</javax.version>
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<odata.version>4.0.0-beta-03</odata.version>
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<slf4j.version>1.7.7</slf4j.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>servlet-api</artifactId>
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<version>${javax.version}</version>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.olingo</groupId>
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<artifactId>odata-server-api</artifactId>
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<version>${odata.version}</version>
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</dependency>
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<dependency>
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<groupId>org.apache.olingo</groupId>
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<artifactId>odata-server-core</artifactId>
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<version>${odata.version}</version>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.olingo</groupId>
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<artifactId>odata-commons-api</artifactId>
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<version>${odata.version}</version>
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</dependency>
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<dependency>
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<groupId>org.apache.olingo</groupId>
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<artifactId>odata-commons-core</artifactId>
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<version>${odata.version}</version>
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</dependency>
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-simple</artifactId>
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<version>${slf4j.version}</version>
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<scope>runtime</scope>
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</dependency>
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</dependencies>
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</project>
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@ -0,0 +1,252 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package myservice.mynamespace.data;
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import java.util.ArrayList;
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import java.util.List;
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import myservice.mynamespace.service.DemoEdmProvider;
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import myservice.mynamespace.util.Util;
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import org.apache.olingo.commons.api.data.Entity;
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import org.apache.olingo.commons.api.data.EntityCollection;
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import org.apache.olingo.commons.api.data.Property;
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import org.apache.olingo.commons.api.data.ValueType;
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import org.apache.olingo.commons.api.edm.EdmEntitySet;
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import org.apache.olingo.commons.api.edm.EdmEntityType;
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import org.apache.olingo.commons.api.edm.FullQualifiedName;
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import org.apache.olingo.server.api.uri.UriParameter;
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public class Storage {
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// represent our database
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private List<Entity> productList;
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private List<Entity> categoryList;
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public Storage() {
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productList = new ArrayList<Entity>();
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categoryList = new ArrayList<Entity>();
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// creating some sample data
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initProductSampleData();
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initCategorySampleData();
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}
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/* PUBLIC FACADE */
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public EntityCollection readEntitySetData(EdmEntitySet edmEntitySet) {
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EntityCollection entitySet = null;
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if (edmEntitySet.getName().equals(DemoEdmProvider.ES_PRODUCTS_NAME)) {
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entitySet = getProducts();
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} else if (edmEntitySet.getName().equals(DemoEdmProvider.ES_CATEGORIES_NAME)) {
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entitySet = getCategories();
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}
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return entitySet;
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}
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public Entity readEntityData(EdmEntitySet edmEntitySet, List<UriParameter> keyParams) {
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Entity entity = null;
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EdmEntityType edmEntityType = edmEntitySet.getEntityType();
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if (edmEntityType.getName().equals(DemoEdmProvider.ET_PRODUCT_NAME)) {
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entity = getProduct(edmEntityType, keyParams);
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} else if (edmEntityType.getName().equals(DemoEdmProvider.ET_CATEGORY_NAME)) {
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entity = getCategory(edmEntityType, keyParams);
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}
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return entity;
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}
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// Navigation
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public Entity getRelatedEntity(Entity entity, EdmEntityType relatedEntityType) {
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EntityCollection collection = getRelatedEntityCollection(entity, relatedEntityType);
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if (collection.getEntities().isEmpty()) {
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return null;
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}
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return collection.getEntities().get(0);
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}
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public Entity getRelatedEntity(Entity entity, EdmEntityType relatedEntityType, List<UriParameter> keyPredicates) {
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EntityCollection relatedEntities = getRelatedEntityCollection(entity, relatedEntityType);
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return Util.findEntity(relatedEntityType, relatedEntities, keyPredicates);
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}
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public EntityCollection getRelatedEntityCollection(Entity sourceEntity, EdmEntityType targetEntityType) {
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EntityCollection navigationTargetEntityCollection = new EntityCollection();
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FullQualifiedName relatedEntityFqn = targetEntityType.getFullQualifiedName();
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String sourceEntityFqn = sourceEntity.getType();
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if (sourceEntityFqn.equals(DemoEdmProvider.ET_PRODUCT_FQN.getFullQualifiedNameAsString())
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&& relatedEntityFqn.equals(DemoEdmProvider.ET_CATEGORY_FQN)) {
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// relation Products->Category (result all categories)
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int productID = (Integer) sourceEntity.getProperty("ID").getValue();
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if (productID == 1 || productID == 2) {
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navigationTargetEntityCollection.getEntities().add(categoryList.get(0));
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} else if (productID == 3 || productID == 4) {
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navigationTargetEntityCollection.getEntities().add(categoryList.get(1));
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} else if (productID == 5 || productID == 6) {
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navigationTargetEntityCollection.getEntities().add(categoryList.get(2));
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}
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} else if (sourceEntityFqn.equals(DemoEdmProvider.ET_CATEGORY_FQN.getFullQualifiedNameAsString())
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&& relatedEntityFqn.equals(DemoEdmProvider.ET_PRODUCT_FQN)) {
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// relation Category->Products (result all products)
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int categoryID = (Integer) sourceEntity.getProperty("ID").getValue();
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if (categoryID == 1) {
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// the first 2 products are notebooks
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navigationTargetEntityCollection.getEntities().addAll(productList.subList(0, 2));
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} else if (categoryID == 2) {
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// the next 2 products are organizers
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navigationTargetEntityCollection.getEntities().addAll(productList.subList(2, 4));
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} else if (categoryID == 3) {
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// the first 2 products are monitors
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navigationTargetEntityCollection.getEntities().addAll(productList.subList(4, 6));
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}
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}
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if (navigationTargetEntityCollection.getEntities().isEmpty()) {
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return null;
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}
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return navigationTargetEntityCollection;
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}
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/* INTERNAL */
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private EntityCollection getProducts() {
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EntityCollection retEntitySet = new EntityCollection();
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for (Entity productEntity : this.productList) {
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retEntitySet.getEntities().add(productEntity);
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}
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return retEntitySet;
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}
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private Entity getProduct(EdmEntityType edmEntityType, List<UriParameter> keyParams) {
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// the list of entities at runtime
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EntityCollection entityCollection = getProducts();
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/* generic approach to find the requested entity */
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return Util.findEntity(edmEntityType, entityCollection, keyParams);
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}
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private EntityCollection getCategories() {
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EntityCollection entitySet = new EntityCollection();
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for (Entity categoryEntity : this.categoryList) {
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entitySet.getEntities().add(categoryEntity);
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}
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return entitySet;
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}
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private Entity getCategory(EdmEntityType edmEntityType, List<UriParameter> keyParams) {
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// the list of entities at runtime
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EntityCollection entitySet = getCategories();
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/* generic approach to find the requested entity */
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return Util.findEntity(edmEntityType, entitySet, keyParams);
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}
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/* HELPER */
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private void initProductSampleData() {
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Entity entity = new Entity();
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entity.addProperty(new Property(null, "ID", ValueType.PRIMITIVE, 1));
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entity.addProperty(new Property(null, "Name", ValueType.PRIMITIVE, "Notebook Basic 15"));
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entity.addProperty(new Property(null, "Description", ValueType.PRIMITIVE,
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"Notebook Basic, 1.7GHz - 15 XGA - 1024MB DDR2 SDRAM - 40GB"));
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entity.setType(DemoEdmProvider.ET_PRODUCT_FQN.getFullQualifiedNameAsString());
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productList.add(entity);
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entity = new Entity();
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entity.addProperty(new Property(null, "ID", ValueType.PRIMITIVE, 2));
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entity.addProperty(new Property(null, "Name", ValueType.PRIMITIVE, "Notebook Professional 17"));
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entity.addProperty(new Property(null, "Description", ValueType.PRIMITIVE,
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"Notebook Professional, 2.8GHz - 15 XGA - 8GB DDR3 RAM - 500GB"));
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entity.setType(DemoEdmProvider.ET_PRODUCT_FQN.getFullQualifiedNameAsString());
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productList.add(entity);
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entity = new Entity();
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entity.addProperty(new Property(null, "ID", ValueType.PRIMITIVE, 3));
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entity.addProperty(new Property(null, "Name", ValueType.PRIMITIVE, "1UMTS PDA"));
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entity.addProperty(new Property(null, "Description", ValueType.PRIMITIVE,
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"Ultrafast 3G UMTS/HSDPA Pocket PC, supports GSM network"));
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entity.setType(DemoEdmProvider.ET_PRODUCT_FQN.getFullQualifiedNameAsString());
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productList.add(entity);
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entity = new Entity();
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entity.addProperty(new Property(null, "ID", ValueType.PRIMITIVE, 4));
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entity.addProperty(new Property(null, "Name", ValueType.PRIMITIVE, "Comfort Easy"));
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entity.addProperty(new Property(null, "Description", ValueType.PRIMITIVE,
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"32 GB Digital Assitant with high-resolution color screen"));
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entity.setType(DemoEdmProvider.ET_PRODUCT_FQN.getFullQualifiedNameAsString());
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productList.add(entity);
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entity = new Entity();
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entity.addProperty(new Property(null, "ID", ValueType.PRIMITIVE, 5));
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entity.addProperty(new Property(null, "Name", ValueType.PRIMITIVE, "Ergo Screen"));
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entity.addProperty(new Property(null, "Description", ValueType.PRIMITIVE,
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"19 Optimum Resolution 1024 x 768 @ 85Hz, resolution 1280 x 960"));
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entity.setType(DemoEdmProvider.ET_PRODUCT_FQN.getFullQualifiedNameAsString());
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productList.add(entity);
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entity = new Entity();
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entity.addProperty(new Property(null, "ID", ValueType.PRIMITIVE, 6));
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entity.addProperty(new Property(null, "Name", ValueType.PRIMITIVE, "Flat Basic"));
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entity.addProperty(new Property(null, "Description", ValueType.PRIMITIVE,
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"Optimum Hi-Resolution max. 1600 x 1200 @ 85Hz, Dot Pitch: 0.24mm"));
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entity.setType(DemoEdmProvider.ET_PRODUCT_FQN.getFullQualifiedNameAsString());
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productList.add(entity);
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}
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private void initCategorySampleData() {
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Entity entity = new Entity();
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entity.addProperty(new Property(null, "ID", ValueType.PRIMITIVE, 1));
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entity.addProperty(new Property(null, "Name", ValueType.PRIMITIVE, "Notebooks"));
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entity.setType(DemoEdmProvider.ET_CATEGORY_FQN.getFullQualifiedNameAsString());
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categoryList.add(entity);
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entity = new Entity();
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entity.addProperty(new Property(null, "ID", ValueType.PRIMITIVE, 2));
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entity.addProperty(new Property(null, "Name", ValueType.PRIMITIVE, "Organizers"));
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entity.setType(DemoEdmProvider.ET_CATEGORY_FQN.getFullQualifiedNameAsString());
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categoryList.add(entity);
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entity = new Entity();
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entity.addProperty(new Property(null, "ID", ValueType.PRIMITIVE, 3));
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entity.addProperty(new Property(null, "Name", ValueType.PRIMITIVE, "Monitors"));
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entity.setType(DemoEdmProvider.ET_CATEGORY_FQN.getFullQualifiedNameAsString());
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categoryList.add(entity);
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}
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}
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@ -0,0 +1,211 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
|
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* to you under the Apache License, Version 2.0 (the
|
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
|
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* specific language governing permissions and limitations
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* under the License.
|
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*/
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package myservice.mynamespace.service;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import org.apache.olingo.commons.api.ODataException;
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import org.apache.olingo.commons.api.edm.EdmPrimitiveTypeKind;
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import org.apache.olingo.commons.api.edm.FullQualifiedName;
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import org.apache.olingo.commons.api.edm.provider.CsdlAbstractEdmProvider;
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import org.apache.olingo.commons.api.edm.provider.CsdlEntityContainer;
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import org.apache.olingo.commons.api.edm.provider.CsdlEntityContainerInfo;
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import org.apache.olingo.commons.api.edm.provider.CsdlEntitySet;
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import org.apache.olingo.commons.api.edm.provider.CsdlEntityType;
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import org.apache.olingo.commons.api.edm.provider.CsdlNavigationProperty;
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import org.apache.olingo.commons.api.edm.provider.CsdlNavigationPropertyBinding;
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import org.apache.olingo.commons.api.edm.provider.CsdlProperty;
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import org.apache.olingo.commons.api.edm.provider.CsdlPropertyRef;
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import org.apache.olingo.commons.api.edm.provider.CsdlSchema;
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public class DemoEdmProvider extends CsdlAbstractEdmProvider {
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// Service Namespace
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public static final String NAMESPACE = "OData.Demo";
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// EDM Container
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public static final String CONTAINER_NAME = "Container";
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public static final FullQualifiedName CONTAINER = new FullQualifiedName(NAMESPACE, CONTAINER_NAME);
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// Entity Types Names
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public static final String ET_PRODUCT_NAME = "Product";
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public static final FullQualifiedName ET_PRODUCT_FQN = new FullQualifiedName(NAMESPACE, ET_PRODUCT_NAME);
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public static final String ET_CATEGORY_NAME = "Category";
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public static final FullQualifiedName ET_CATEGORY_FQN = new FullQualifiedName(NAMESPACE, ET_CATEGORY_NAME);
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// Entity Set Names
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public static final String ES_PRODUCTS_NAME = "Products";
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public static final String ES_CATEGORIES_NAME = "Categories";
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@Override
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public CsdlEntityType getEntityType(FullQualifiedName entityTypeName) throws ODataException {
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// this method is called for each EntityType that are configured in the Schema
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CsdlEntityType entityType = null;
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if (entityTypeName.equals(ET_PRODUCT_FQN)) {
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// create EntityType properties
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CsdlProperty id = new CsdlProperty().setName("ID")
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.setType(EdmPrimitiveTypeKind.Int32.getFullQualifiedName());
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CsdlProperty name = new CsdlProperty().setName("Name")
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.setType(EdmPrimitiveTypeKind.String.getFullQualifiedName());
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CsdlProperty description = new CsdlProperty().setName("Description")
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.setType(EdmPrimitiveTypeKind.String.getFullQualifiedName());
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// create PropertyRef for Key element
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CsdlPropertyRef propertyRef = new CsdlPropertyRef();
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propertyRef.setName("ID");
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// navigation property: many-to-one, null not allowed (product must have a category)
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CsdlNavigationProperty navProp = new CsdlNavigationProperty().setName("Category")
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.setType(ET_CATEGORY_FQN).setNullable(false).setPartner("Products");
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List<CsdlNavigationProperty> navPropList = new ArrayList<CsdlNavigationProperty>();
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navPropList.add(navProp);
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// configure EntityType
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entityType = new CsdlEntityType();
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entityType.setName(ET_PRODUCT_NAME);
|
||||
entityType.setProperties(Arrays.asList(id, name, description));
|
||||
entityType.setKey(Arrays.asList(propertyRef));
|
||||
entityType.setNavigationProperties(navPropList);
|
||||
|
||||
} else if (entityTypeName.equals(ET_CATEGORY_FQN)) {
|
||||
// create EntityType properties
|
||||
CsdlProperty id = new CsdlProperty().setName("ID")
|
||||
.setType(EdmPrimitiveTypeKind.Int32.getFullQualifiedName());
|
||||
CsdlProperty name = new CsdlProperty().setName("Name")
|
||||
.setType(EdmPrimitiveTypeKind.String.getFullQualifiedName());
|
||||
|
||||
// create PropertyRef for Key element
|
||||
CsdlPropertyRef propertyRef = new CsdlPropertyRef();
|
||||
propertyRef.setName("ID");
|
||||
|
||||
// navigation property: one-to-many
|
||||
CsdlNavigationProperty navProp = new CsdlNavigationProperty().setName("Products")
|
||||
.setType(ET_PRODUCT_FQN).setCollection(true).setPartner("Category");
|
||||
List<CsdlNavigationProperty> navPropList = new ArrayList<CsdlNavigationProperty>();
|
||||
navPropList.add(navProp);
|
||||
|
||||
// configure EntityType
|
||||
entityType = new CsdlEntityType();
|
||||
entityType.setName(ET_CATEGORY_NAME);
|
||||
entityType.setProperties(Arrays.asList(id, name));
|
||||
entityType.setKey(Arrays.asList(propertyRef));
|
||||
entityType.setNavigationProperties(navPropList);
|
||||
}
|
||||
|
||||
return entityType;
|
||||
|
||||
}
|
||||
|
||||
@Override
|
||||
public CsdlEntitySet getEntitySet(FullQualifiedName entityContainer, String entitySetName) throws ODataException {
|
||||
|
||||
CsdlEntitySet entitySet = null;
|
||||
|
||||
if (entityContainer.equals(CONTAINER)) {
|
||||
|
||||
if (entitySetName.equals(ES_PRODUCTS_NAME)) {
|
||||
|
||||
entitySet = new CsdlEntitySet();
|
||||
entitySet.setName(ES_PRODUCTS_NAME);
|
||||
entitySet.setType(ET_PRODUCT_FQN);
|
||||
|
||||
// navigation
|
||||
CsdlNavigationPropertyBinding navPropBinding = new CsdlNavigationPropertyBinding();
|
||||
navPropBinding.setTarget("Categories"); // the target entity set, where the navigation property points to
|
||||
navPropBinding.setPath("Category"); // the path from entity type to navigation property
|
||||
List<CsdlNavigationPropertyBinding> navPropBindingList = new ArrayList<CsdlNavigationPropertyBinding>();
|
||||
navPropBindingList.add(navPropBinding);
|
||||
entitySet.setNavigationPropertyBindings(navPropBindingList);
|
||||
|
||||
} else if (entitySetName.equals(ES_CATEGORIES_NAME)) {
|
||||
|
||||
entitySet = new CsdlEntitySet();
|
||||
entitySet.setName(ES_CATEGORIES_NAME);
|
||||
entitySet.setType(ET_CATEGORY_FQN);
|
||||
|
||||
// navigation
|
||||
CsdlNavigationPropertyBinding navPropBinding = new CsdlNavigationPropertyBinding();
|
||||
navPropBinding.setTarget("Products"); // the target entity set, where the navigation property points to
|
||||
navPropBinding.setPath("Products"); // the path from entity type to navigation property
|
||||
List<CsdlNavigationPropertyBinding> navPropBindingList = new ArrayList<CsdlNavigationPropertyBinding>();
|
||||
navPropBindingList.add(navPropBinding);
|
||||
entitySet.setNavigationPropertyBindings(navPropBindingList);
|
||||
}
|
||||
}
|
||||
|
||||
return entitySet;
|
||||
}
|
||||
|
||||
@Override
|
||||
public CsdlEntityContainerInfo getEntityContainerInfo(FullQualifiedName entityContainerName) throws ODataException {
|
||||
|
||||
// This method is invoked when displaying the service document at
|
||||
// e.g. http://localhost:8080/DemoService/DemoService.svc
|
||||
if (entityContainerName == null || entityContainerName.equals(CONTAINER)) {
|
||||
CsdlEntityContainerInfo entityContainerInfo = new CsdlEntityContainerInfo();
|
||||
entityContainerInfo.setContainerName(CONTAINER);
|
||||
return entityContainerInfo;
|
||||
}
|
||||
|
||||
return null;
|
||||
}
|
||||
|
||||
@Override
|
||||
public List<CsdlSchema> getSchemas() throws ODataException {
|
||||
// create Schema
|
||||
CsdlSchema schema = new CsdlSchema();
|
||||
schema.setNamespace(NAMESPACE);
|
||||
|
||||
// add EntityTypes
|
||||
List<CsdlEntityType> entityTypes = new ArrayList<CsdlEntityType>();
|
||||
entityTypes.add(getEntityType(ET_PRODUCT_FQN));
|
||||
entityTypes.add(getEntityType(ET_CATEGORY_FQN));
|
||||
schema.setEntityTypes(entityTypes);
|
||||
|
||||
// add EntityContainer
|
||||
schema.setEntityContainer(getEntityContainer());
|
||||
|
||||
// finally
|
||||
List<CsdlSchema> schemas = new ArrayList<CsdlSchema>();
|
||||
schemas.add(schema);
|
||||
|
||||
return schemas;
|
||||
}
|
||||
|
||||
@Override
|
||||
public CsdlEntityContainer getEntityContainer() throws ODataException {
|
||||
|
||||
// create EntitySets
|
||||
List<CsdlEntitySet> entitySets = new ArrayList<CsdlEntitySet>();
|
||||
entitySets.add(getEntitySet(CONTAINER, ES_PRODUCTS_NAME));
|
||||
entitySets.add(getEntitySet(CONTAINER, ES_CATEGORIES_NAME));
|
||||
|
||||
// create EntityContainer
|
||||
CsdlEntityContainer entityContainer = new CsdlEntityContainer();
|
||||
entityContainer.setName(CONTAINER_NAME);
|
||||
entityContainer.setEntitySets(entitySets);
|
||||
|
||||
return entityContainer;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,160 @@
|
|||
/*
|
||||
* Licensed to the Apache Software Foundation (ASF) under one
|
||||
* or more contributor license agreements. See the NOTICE file
|
||||
* distributed with this work for additional information
|
||||
* regarding copyright ownership. The ASF licenses this file
|
||||
* to you under the Apache License, Version 2.0 (the
|
||||
* "License"); you may not use this file except in compliance
|
||||
* with the License. You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing,
|
||||
* software distributed under the License is distributed on an
|
||||
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
||||
* KIND, either express or implied. See the License for the
|
||||
* specific language governing permissions and limitations
|
||||
* under the License.
|
||||
*/
|
||||
package myservice.mynamespace.service;
|
||||
|
||||
import java.util.List;
|
||||
|
||||
import myservice.mynamespace.data.Storage;
|
||||
|
||||
import org.apache.olingo.commons.api.Constants;
|
||||
import org.apache.olingo.commons.api.data.ContextURL;
|
||||
import org.apache.olingo.commons.api.data.Entity;
|
||||
import org.apache.olingo.commons.api.data.EntityCollection;
|
||||
import org.apache.olingo.commons.api.data.Link;
|
||||
import org.apache.olingo.commons.api.edm.EdmEntitySet;
|
||||
import org.apache.olingo.commons.api.edm.EdmEntityType;
|
||||
import org.apache.olingo.commons.api.edm.EdmNavigationProperty;
|
||||
import org.apache.olingo.commons.api.format.ContentType;
|
||||
import org.apache.olingo.commons.api.format.ODataFormat;
|
||||
import org.apache.olingo.commons.api.http.HttpHeader;
|
||||
import org.apache.olingo.commons.api.http.HttpStatusCode;
|
||||
import org.apache.olingo.server.api.OData;
|
||||
import org.apache.olingo.server.api.ODataApplicationException;
|
||||
import org.apache.olingo.server.api.ODataRequest;
|
||||
import org.apache.olingo.server.api.ODataResponse;
|
||||
import org.apache.olingo.server.api.ServiceMetadata;
|
||||
import org.apache.olingo.server.api.processor.EntityCollectionProcessor;
|
||||
import org.apache.olingo.server.api.serializer.EntityCollectionSerializerOptions;
|
||||
import org.apache.olingo.server.api.serializer.ODataSerializer;
|
||||
import org.apache.olingo.server.api.serializer.SerializerException;
|
||||
import org.apache.olingo.server.api.serializer.SerializerResult;
|
||||
import org.apache.olingo.server.api.uri.UriInfo;
|
||||
import org.apache.olingo.server.api.uri.UriResource;
|
||||
import org.apache.olingo.server.api.uri.UriResourceEntitySet;
|
||||
import org.apache.olingo.server.api.uri.UriResourceNavigation;
|
||||
import org.apache.olingo.server.api.uri.queryoption.ExpandItem;
|
||||
import org.apache.olingo.server.api.uri.queryoption.ExpandOption;
|
||||
import org.apache.olingo.server.api.uri.queryoption.SelectOption;
|
||||
|
||||
public class DemoEntityCollectionProcessor implements EntityCollectionProcessor {
|
||||
|
||||
private OData odata;
|
||||
private ServiceMetadata srvMetadata;
|
||||
// our database-mock
|
||||
private Storage storage;
|
||||
|
||||
public DemoEntityCollectionProcessor(Storage storage) {
|
||||
this.storage = storage;
|
||||
}
|
||||
|
||||
public void init(OData odata, ServiceMetadata serviceMetadata) {
|
||||
this.odata = odata;
|
||||
this.srvMetadata = serviceMetadata;
|
||||
}
|
||||
|
||||
/*
|
||||
* This method is invoked when a collection of entities has to be read. In
|
||||
* our example, this can be either a "normal" read operation, or a
|
||||
* navigation:
|
||||
*
|
||||
* Example for "normal" read entity set operation:
|
||||
* http://localhost:8080/DemoService/DemoService.svc/Categories
|
||||
*
|
||||
* Example for navigation
|
||||
* http://localhost:8080/DemoService/DemoService.svc/Categories(3)/Products
|
||||
*/
|
||||
public void readEntityCollection(ODataRequest request,
|
||||
ODataResponse response, UriInfo uriInfo, ContentType responseFormat)
|
||||
throws ODataApplicationException, SerializerException {
|
||||
|
||||
// 1st retrieve the requested EdmEntitySet from the uriInfo
|
||||
List<UriResource> resourcePaths = uriInfo.getUriResourceParts();
|
||||
// in our example, the first segment is the EntitySet
|
||||
UriResourceEntitySet uriResourceEntitySet = (UriResourceEntitySet) resourcePaths.get(0);
|
||||
EdmEntitySet edmEntitySet = uriResourceEntitySet.getEntitySet();
|
||||
|
||||
// 2nd: fetch the data from backend for this requested EntitySetName
|
||||
EntityCollection entityCollection = storage.readEntitySetData(edmEntitySet);
|
||||
|
||||
// 3rd: apply system query options
|
||||
SelectOption selectOption = uriInfo.getSelectOption();
|
||||
ExpandOption expandOption = uriInfo.getExpandOption();
|
||||
|
||||
// handle $expand
|
||||
// in our example: http://localhost:8080/DemoService/DemoService.svc/Categories/$expand=Products
|
||||
// or http://localhost:8080/DemoService/DemoService.svc/Products?$expand=Category
|
||||
if (expandOption != null) {
|
||||
|
||||
// retrieve the EdmNavigationProperty from the expand expression
|
||||
// Note: in our example, we have only one NavigationProperty, so we can directly access it
|
||||
ExpandItem expandItem = expandOption.getExpandItems().get(0);
|
||||
// can be 'Category' or 'Products'
|
||||
UriResource uriResource = expandItem.getResourcePath().getUriResourceParts().get(0);
|
||||
// we don't need to handle error cases, as it is done in the Olingo library
|
||||
if (uriResource instanceof UriResourceNavigation) {
|
||||
EdmNavigationProperty edmNavigationProperty = ((UriResourceNavigation) uriResource).getProperty();
|
||||
String navPropName = edmNavigationProperty.getName();
|
||||
EdmEntityType expandEdmEntityType = edmNavigationProperty.getType();
|
||||
|
||||
List<Entity> entityList = entityCollection.getEntities();
|
||||
for (Entity entity : entityList) {
|
||||
Link link = new Link();
|
||||
link.setTitle(navPropName);
|
||||
link.setType(Constants.ENTITY_NAVIGATION_LINK_TYPE);
|
||||
|
||||
if (edmNavigationProperty.isCollection()) { // in case of Categories/$expand=Products
|
||||
// fetch the data for the $expand (to-many navigation) from backend
|
||||
EntityCollection expandEntityCollection = storage.getRelatedEntityCollection(entity, expandEdmEntityType);
|
||||
link.setInlineEntitySet(expandEntityCollection);
|
||||
} else { // in case of Products?$expand=Category
|
||||
// fetch the data for the $expand (to-one navigation) from backend
|
||||
// here we get the data for the expand
|
||||
Entity expandEntity = storage.getRelatedEntity(entity, expandEdmEntityType);
|
||||
link.setInlineEntity(expandEntity);
|
||||
}
|
||||
|
||||
// set the link - containing the expanded data - to the current entity
|
||||
entity.getNavigationLinks().add(link);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// 4th: serialize
|
||||
EdmEntityType edmEntityType = edmEntitySet.getEntityType();
|
||||
// we need the property names of the $select, in order to build the context URL
|
||||
String selectList = odata.createUriHelper().buildContextURLSelectList(edmEntityType, expandOption, selectOption);
|
||||
ContextURL contextUrl = ContextURL.with().entitySet(edmEntitySet).selectList(selectList).build();
|
||||
|
||||
// adding the selectOption to the serializerOpts will actually tell the lib to do the job
|
||||
EntityCollectionSerializerOptions opts = EntityCollectionSerializerOptions.with()
|
||||
.contextURL(contextUrl)
|
||||
.select(selectOption)
|
||||
.expand(expandOption)
|
||||
.build();
|
||||
|
||||
ODataSerializer serializer = odata.createSerializer(ODataFormat.fromContentType(responseFormat));
|
||||
SerializerResult serializerResult = serializer.entityCollection(srvMetadata, edmEntityType, entityCollection, opts);
|
||||
|
||||
// 5th: configure the response object: set the body, headers and status code
|
||||
response.setContent(serializerResult.getContent());
|
||||
response.setStatusCode(HttpStatusCode.OK.getStatusCode());
|
||||
response.setHeader(HttpHeader.CONTENT_TYPE, responseFormat.toContentTypeString());
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,235 @@
|
|||
/*
|
||||
* Licensed to the Apache Software Foundation (ASF) under one
|
||||
* or more contributor license agreements. See the NOTICE file
|
||||
* distributed with this work for additional information
|
||||
* regarding copyright ownership. The ASF licenses this file
|
||||
* to you under the Apache License, Version 2.0 (the
|
||||
* "License"); you may not use this file except in compliance
|
||||
* with the License. You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing,
|
||||
* software distributed under the License is distributed on an
|
||||
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
||||
* KIND, either express or implied. See the License for the
|
||||
* specific language governing permissions and limitations
|
||||
* under the License.
|
||||
*/
|
||||
package myservice.mynamespace.service;
|
||||
|
||||
import java.util.List;
|
||||
import java.util.Locale;
|
||||
|
||||
import myservice.mynamespace.data.Storage;
|
||||
|
||||
import org.apache.olingo.commons.api.Constants;
|
||||
import org.apache.olingo.commons.api.data.ContextURL;
|
||||
import org.apache.olingo.commons.api.data.ContextURL.Suffix;
|
||||
import org.apache.olingo.commons.api.data.Entity;
|
||||
import org.apache.olingo.commons.api.data.EntityCollection;
|
||||
import org.apache.olingo.commons.api.data.Link;
|
||||
import org.apache.olingo.commons.api.edm.EdmEntitySet;
|
||||
import org.apache.olingo.commons.api.edm.EdmEntityType;
|
||||
import org.apache.olingo.commons.api.edm.EdmNavigationProperty;
|
||||
import org.apache.olingo.commons.api.format.ContentType;
|
||||
import org.apache.olingo.commons.api.format.ODataFormat;
|
||||
import org.apache.olingo.commons.api.http.HttpHeader;
|
||||
import org.apache.olingo.commons.api.http.HttpStatusCode;
|
||||
import org.apache.olingo.server.api.OData;
|
||||
import org.apache.olingo.server.api.ODataApplicationException;
|
||||
import org.apache.olingo.server.api.ODataRequest;
|
||||
import org.apache.olingo.server.api.ODataResponse;
|
||||
import org.apache.olingo.server.api.ServiceMetadata;
|
||||
import org.apache.olingo.server.api.deserializer.DeserializerException;
|
||||
import org.apache.olingo.server.api.processor.EntityProcessor;
|
||||
import org.apache.olingo.server.api.serializer.EntitySerializerOptions;
|
||||
import org.apache.olingo.server.api.serializer.ODataSerializer;
|
||||
import org.apache.olingo.server.api.serializer.SerializerException;
|
||||
import org.apache.olingo.server.api.serializer.SerializerResult;
|
||||
import org.apache.olingo.server.api.uri.UriInfo;
|
||||
import org.apache.olingo.server.api.uri.UriParameter;
|
||||
import org.apache.olingo.server.api.uri.UriResource;
|
||||
import org.apache.olingo.server.api.uri.UriResourceEntitySet;
|
||||
import org.apache.olingo.server.api.uri.UriResourceNavigation;
|
||||
import org.apache.olingo.server.api.uri.queryoption.ExpandItem;
|
||||
import org.apache.olingo.server.api.uri.queryoption.ExpandOption;
|
||||
import org.apache.olingo.server.api.uri.queryoption.SelectOption;
|
||||
|
||||
public class DemoEntityProcessor implements EntityProcessor {
|
||||
|
||||
private OData odata;
|
||||
private ServiceMetadata srvMetadata;
|
||||
private Storage storage;
|
||||
|
||||
public DemoEntityProcessor(Storage storage) {
|
||||
this.storage = storage;
|
||||
}
|
||||
|
||||
public void init(OData odata, ServiceMetadata serviceMetadata) {
|
||||
this.odata = odata;
|
||||
this.srvMetadata = serviceMetadata;
|
||||
}
|
||||
|
||||
|
||||
// /**
|
||||
// * DUMMY example implementation
|
||||
// * */
|
||||
// public void readEntity(ODataRequest request, ODataResponse response, UriInfo uriInfo, ContentType responseFormat)
|
||||
// throws ODataApplicationException, SerializerException {
|
||||
//
|
||||
// // 1. Analyze the URI
|
||||
// EdmEntitySet edmEntitySet = ((UriResourceEntitySet)uriInfo.getUriResourceParts().get(0)).getEntitySet();
|
||||
// // get the system query option $expand
|
||||
// ExpandOption expandOption = uriInfo.getExpandOption();
|
||||
//
|
||||
// // 2. get the data.
|
||||
//
|
||||
// // Note: this is FAKE implementation
|
||||
// // used for following request:
|
||||
// // http://localhost:8080/DemoService/DemoService.svc/Products(1)?$expand=Category
|
||||
//
|
||||
// // create hard-coded product entity and set a hard-coded category as inlineEntity for the expand
|
||||
// Entity fakeProductEntity = new Entity().addProperty(new Property(null, "ID", ValueType.PRIMITIVE, 11))
|
||||
// .addProperty(new Property(null, "Name", ValueType.PRIMITIVE, "Gamer Mouse"));
|
||||
// fakeProductEntity.addProperty(new Property(null, "Description", ValueType.PRIMITIVE, "High end gaming mouse"));
|
||||
//
|
||||
// // create hard-coded category entity (the target of the $expand)
|
||||
// Entity fakeCategoryEntity = new Entity().addProperty(new Property(null, "ID", ValueType.PRIMITIVE, 22))
|
||||
// .addProperty(new Property(null, "Name", ValueType.PRIMITIVE, "Mice"));
|
||||
//
|
||||
// // create navigation link from product to category
|
||||
// Link fakeLink = new Link();
|
||||
// fakeLink.setTitle("Category"); // hard-code the name of the navigation property as declared in EdmProvider
|
||||
// fakeLink.setInlineEntity(fakeCategoryEntity); // the entity which will be expanded
|
||||
//
|
||||
// //add the link to the product entity
|
||||
// fakeProductEntity.getNavigationLinks().add(fakeLink);
|
||||
//
|
||||
// // END FAKE
|
||||
//
|
||||
//
|
||||
// // 3. serialize
|
||||
// ContextURL contextUrl = ContextURL.with().entitySet(edmEntitySet).suffix(ContextURL.Suffix.ENTITY).build();
|
||||
// // $expand info is added to the serializer options
|
||||
// EntitySerializerOptions options = EntitySerializerOptions.with().contextURL(contextUrl).expand(expandOption).build();
|
||||
// ODataSerializer serializer = this.odata.createSerializer(ODataFormat.fromContentType(responseFormat));
|
||||
// SerializerResult serializerResult = serializer.entity(srvMetadata, edmEntitySet.getEntityType(), fakeProductEntity, options);
|
||||
//
|
||||
// //4. configure the response object
|
||||
// response.setContent(serializerResult.getContent());
|
||||
// response.setStatusCode(HttpStatusCode.OK.getStatusCode());
|
||||
// response.setHeader(HttpHeader.CONTENT_TYPE, responseFormat.toContentTypeString());
|
||||
// }
|
||||
|
||||
|
||||
|
||||
public void readEntity(ODataRequest request, ODataResponse response, UriInfo uriInfo, ContentType responseFormat)
|
||||
throws ODataApplicationException, SerializerException {
|
||||
|
||||
// 1. retrieve the Entity Type
|
||||
List<UriResource> resourcePaths = uriInfo.getUriResourceParts();
|
||||
// Note: only in our example we can assume that the first segment is the EntitySet
|
||||
UriResourceEntitySet uriResourceEntitySet = (UriResourceEntitySet) resourcePaths.get(0);
|
||||
EdmEntitySet edmEntitySet = uriResourceEntitySet.getEntitySet();
|
||||
|
||||
// 2. retrieve the data from backend
|
||||
List<UriParameter> keyPredicates = uriResourceEntitySet.getKeyPredicates();
|
||||
Entity entity = storage.readEntityData(edmEntitySet, keyPredicates);
|
||||
|
||||
// 3. apply system query options
|
||||
|
||||
// handle $select
|
||||
SelectOption selectOption = uriInfo.getSelectOption();
|
||||
// in our example, we don't have performance issues, so we can rely upon the handling in the Olingo lib
|
||||
// nothing else to be done
|
||||
|
||||
// handle $expand
|
||||
ExpandOption expandOption = uriInfo.getExpandOption();
|
||||
// in our example: http://localhost:8080/DemoService/DemoService.svc/Categories(1)/$expand=Products
|
||||
// or http://localhost:8080/DemoService/DemoService.svc/Products(1)?$expand=Category
|
||||
if(expandOption != null){
|
||||
|
||||
// retrieve the EdmNavigationProperty from the expand expression
|
||||
// Note: in our example, we have only one NavigationProperty, so we can directly access it
|
||||
ExpandItem expandItem = expandOption.getExpandItems().get(0);
|
||||
// can be 'Category' or 'Products', no path supported
|
||||
UriResource uriResource = expandItem.getResourcePath().getUriResourceParts().get(0);
|
||||
// we don't need to handle error cases, as it is done in the Olingo library
|
||||
if(uriResource instanceof UriResourceNavigation){
|
||||
EdmNavigationProperty edmNavigationProperty = ((UriResourceNavigation)uriResource).getProperty();
|
||||
EdmEntityType expandEdmEntityType = edmNavigationProperty.getType();
|
||||
String navPropName = edmNavigationProperty.getName();
|
||||
|
||||
// build the inline data
|
||||
Link link = new Link();
|
||||
link.setTitle(navPropName);
|
||||
link.setType(Constants.ENTITY_NAVIGATION_LINK_TYPE);
|
||||
|
||||
if(edmNavigationProperty.isCollection()){ // in case of Categories(1)/$expand=Products
|
||||
// fetch the data for the $expand (to-many navigation) from backend
|
||||
// here we get the data for the expand
|
||||
EntityCollection expandEntityCollection = storage.getRelatedEntityCollection(entity, expandEdmEntityType);
|
||||
link.setInlineEntitySet(expandEntityCollection);
|
||||
}else{ // in case of Products(1)?$expand=Category
|
||||
// fetch the data for the $expand (to-one navigation) from backend
|
||||
// here we get the data for the expand
|
||||
Entity expandEntity = storage.getRelatedEntity(entity, expandEdmEntityType);
|
||||
link.setInlineEntity(expandEntity);
|
||||
}
|
||||
|
||||
// set the link - containing the expanded data - to the current entity
|
||||
entity.getNavigationLinks().add(link);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
// 4. serialize
|
||||
EdmEntityType edmEntityType = edmEntitySet.getEntityType();
|
||||
// we need the property names of the $select, in order to build the context URL
|
||||
String selectList = odata.createUriHelper().buildContextURLSelectList(edmEntityType, expandOption, selectOption);
|
||||
ContextURL contextUrl = ContextURL.with().entitySet(edmEntitySet)
|
||||
.selectList(selectList)
|
||||
.suffix(Suffix.ENTITY).build();
|
||||
|
||||
// make sure that $expand and $select are considered by the serializer
|
||||
// adding the selectOption to the serializerOpts will actually tell the lib to do the job
|
||||
EntitySerializerOptions opts = EntitySerializerOptions.with()
|
||||
.contextURL(contextUrl)
|
||||
.select(selectOption)
|
||||
.expand(expandOption)
|
||||
.build();
|
||||
|
||||
ODataSerializer serializer = this.odata.createSerializer(ODataFormat.fromContentType(responseFormat));
|
||||
SerializerResult serializerResult = serializer.entity(srvMetadata, edmEntityType, entity, opts);
|
||||
|
||||
//5. configure the response object
|
||||
response.setContent(serializerResult.getContent());
|
||||
response.setStatusCode(HttpStatusCode.OK.getStatusCode());
|
||||
response.setHeader(HttpHeader.CONTENT_TYPE, responseFormat.toContentTypeString());
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* These processor methods are not handled in this tutorial
|
||||
*/
|
||||
|
||||
public void createEntity(ODataRequest request, ODataResponse response, UriInfo uriInfo,
|
||||
ContentType requestFormat, ContentType responseFormat)
|
||||
throws ODataApplicationException, DeserializerException, SerializerException {
|
||||
throw new ODataApplicationException("Not supported.", HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
|
||||
}
|
||||
|
||||
public void updateEntity(ODataRequest request, ODataResponse response, UriInfo uriInfo,
|
||||
ContentType requestFormat, ContentType responseFormat)
|
||||
throws ODataApplicationException, DeserializerException, SerializerException {
|
||||
throw new ODataApplicationException("Not supported.", HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
|
||||
}
|
||||
|
||||
public void deleteEntity(ODataRequest request, ODataResponse response, UriInfo uriInfo)
|
||||
throws ODataApplicationException {
|
||||
throw new ODataApplicationException("Not supported.", HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,150 @@
|
|||
/*
|
||||
* Licensed to the Apache Software Foundation (ASF) under one
|
||||
* or more contributor license agreements. See the NOTICE file
|
||||
* distributed with this work for additional information
|
||||
* regarding copyright ownership. The ASF licenses this file
|
||||
* to you under the Apache License, Version 2.0 (the
|
||||
* "License"); you may not use this file except in compliance
|
||||
* with the License. You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing,
|
||||
* software distributed under the License is distributed on an
|
||||
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
||||
* KIND, either express or implied. See the License for the
|
||||
* specific language governing permissions and limitations
|
||||
* under the License.
|
||||
*/
|
||||
package myservice.mynamespace.service;
|
||||
|
||||
import java.io.InputStream;
|
||||
import java.util.List;
|
||||
import java.util.Locale;
|
||||
|
||||
import myservice.mynamespace.data.Storage;
|
||||
|
||||
import org.apache.olingo.commons.api.data.ContextURL;
|
||||
import org.apache.olingo.commons.api.data.Entity;
|
||||
import org.apache.olingo.commons.api.data.Property;
|
||||
import org.apache.olingo.commons.api.edm.EdmEntitySet;
|
||||
import org.apache.olingo.commons.api.edm.EdmPrimitiveType;
|
||||
import org.apache.olingo.commons.api.edm.EdmProperty;
|
||||
import org.apache.olingo.commons.api.format.ContentType;
|
||||
import org.apache.olingo.commons.api.format.ODataFormat;
|
||||
import org.apache.olingo.commons.api.http.HttpHeader;
|
||||
import org.apache.olingo.commons.api.http.HttpStatusCode;
|
||||
import org.apache.olingo.server.api.OData;
|
||||
import org.apache.olingo.server.api.ODataApplicationException;
|
||||
import org.apache.olingo.server.api.ODataRequest;
|
||||
import org.apache.olingo.server.api.ODataResponse;
|
||||
import org.apache.olingo.server.api.ServiceMetadata;
|
||||
import org.apache.olingo.server.api.deserializer.DeserializerException;
|
||||
import org.apache.olingo.server.api.processor.PrimitiveProcessor;
|
||||
import org.apache.olingo.server.api.serializer.ODataSerializer;
|
||||
import org.apache.olingo.server.api.serializer.PrimitiveSerializerOptions;
|
||||
import org.apache.olingo.server.api.serializer.SerializerException;
|
||||
import org.apache.olingo.server.api.serializer.SerializerResult;
|
||||
import org.apache.olingo.server.api.uri.UriInfo;
|
||||
import org.apache.olingo.server.api.uri.UriParameter;
|
||||
import org.apache.olingo.server.api.uri.UriResource;
|
||||
import org.apache.olingo.server.api.uri.UriResourceEntitySet;
|
||||
import org.apache.olingo.server.api.uri.UriResourceProperty;
|
||||
|
||||
public class DemoPrimitiveProcessor implements PrimitiveProcessor {
|
||||
|
||||
private OData odata;
|
||||
private Storage storage;
|
||||
|
||||
public DemoPrimitiveProcessor(Storage storage) {
|
||||
this.storage = storage;
|
||||
}
|
||||
|
||||
public void init(OData odata, ServiceMetadata serviceMetadata) {
|
||||
this.odata = odata;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
* In our example, the URL would be: http://localhost:8080/DemoService/DemoService.svc/Products(1)/Name
|
||||
* and the response:
|
||||
* {
|
||||
*
|
||||
* @odata.context: "$metadata#Products/Name",
|
||||
* value: "Notebook Basic 15"
|
||||
* }
|
||||
*/
|
||||
public void readPrimitive(ODataRequest request, ODataResponse response,
|
||||
UriInfo uriInfo, ContentType responseFormat)
|
||||
throws ODataApplicationException, SerializerException {
|
||||
|
||||
// 1. Retrieve info from URI
|
||||
// 1.1. retrieve the info about the requested entity set
|
||||
List<UriResource> resourceParts = uriInfo.getUriResourceParts();
|
||||
// Note: only in our example we can rely that the first segment is the EntitySet
|
||||
UriResourceEntitySet uriEntityset = (UriResourceEntitySet) resourceParts.get(0);
|
||||
EdmEntitySet edmEntitySet = uriEntityset.getEntitySet();
|
||||
// the key for the entity
|
||||
List<UriParameter> keyPredicates = uriEntityset.getKeyPredicates();
|
||||
|
||||
// 1.2. retrieve the requested (Edm) property
|
||||
// the last segment is the Property
|
||||
UriResourceProperty uriProperty = (UriResourceProperty) resourceParts.get(resourceParts.size() - 1);
|
||||
EdmProperty edmProperty = uriProperty.getProperty();
|
||||
String edmPropertyName = edmProperty.getName();
|
||||
// in our example, we know we have only primitive types in our model
|
||||
EdmPrimitiveType edmPropertyType = (EdmPrimitiveType) edmProperty.getType();
|
||||
|
||||
// 2. retrieve data from backend
|
||||
// 2.1. retrieve the entity data, for which the property has to be read
|
||||
Entity entity = storage.readEntityData(edmEntitySet, keyPredicates);
|
||||
if (entity == null) { // Bad request
|
||||
throw new ODataApplicationException("Entity not found",
|
||||
HttpStatusCode.NOT_FOUND.getStatusCode(), Locale.ENGLISH);
|
||||
}
|
||||
|
||||
// 2.2. retrieve the property data from the entity
|
||||
Property property = entity.getProperty(edmPropertyName);
|
||||
if (property == null) {
|
||||
throw new ODataApplicationException("Property not found",
|
||||
HttpStatusCode.NOT_FOUND.getStatusCode(), Locale.ENGLISH);
|
||||
}
|
||||
|
||||
// 3. serialize
|
||||
Object value = property.getValue();
|
||||
if (value != null) {
|
||||
// 3.1. configure the serializer
|
||||
ODataFormat format = ODataFormat.fromContentType(responseFormat);
|
||||
ODataSerializer serializer = odata.createSerializer(format);
|
||||
|
||||
ContextURL contextUrl = ContextURL.with().entitySet(edmEntitySet).navOrPropertyPath(edmPropertyName).build();
|
||||
PrimitiveSerializerOptions options = PrimitiveSerializerOptions.with().contextURL(contextUrl).build();
|
||||
// 3.2. serialize
|
||||
SerializerResult serializerResult = serializer.primitive(edmPropertyType, property, options);
|
||||
InputStream propertyStream = serializerResult.getContent();
|
||||
|
||||
// 4. configure the response object
|
||||
response.setContent(propertyStream);
|
||||
response.setStatusCode(HttpStatusCode.OK.getStatusCode());
|
||||
response.setHeader(HttpHeader.CONTENT_TYPE, responseFormat.toContentTypeString());
|
||||
} else {
|
||||
// in case there's no value for the property, we can skip the serialization
|
||||
response.setStatusCode(HttpStatusCode.NO_CONTENT.getStatusCode());
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* These processor methods are not handled in this tutorial
|
||||
*/
|
||||
|
||||
public void updatePrimitive(ODataRequest request, ODataResponse response, UriInfo uriInfo, ContentType requestFormat,
|
||||
ContentType responseFormat)
|
||||
throws ODataApplicationException, DeserializerException, SerializerException {
|
||||
throw new ODataApplicationException("Not supported.", HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
|
||||
}
|
||||
|
||||
public void deletePrimitive(ODataRequest request, ODataResponse response, UriInfo uriInfo)
|
||||
throws ODataApplicationException {
|
||||
throw new ODataApplicationException("Not supported.", HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,149 @@
|
|||
/*
|
||||
* Licensed to the Apache Software Foundation (ASF) under one
|
||||
* or more contributor license agreements. See the NOTICE file
|
||||
* distributed with this work for additional information
|
||||
* regarding copyright ownership. The ASF licenses this file
|
||||
* to you under the Apache License, Version 2.0 (the
|
||||
* "License"); you may not use this file except in compliance
|
||||
* with the License. You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing,
|
||||
* software distributed under the License is distributed on an
|
||||
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
||||
* KIND, either express or implied. See the License for the
|
||||
* specific language governing permissions and limitations
|
||||
* under the License.
|
||||
*/
|
||||
package myservice.mynamespace.util;
|
||||
|
||||
import java.util.List;
|
||||
import java.util.Locale;
|
||||
|
||||
import org.apache.olingo.commons.api.data.Entity;
|
||||
import org.apache.olingo.commons.api.data.EntityCollection;
|
||||
import org.apache.olingo.commons.api.edm.EdmBindingTarget;
|
||||
import org.apache.olingo.commons.api.edm.EdmEntitySet;
|
||||
import org.apache.olingo.commons.api.edm.EdmEntityType;
|
||||
import org.apache.olingo.commons.api.edm.EdmNavigationProperty;
|
||||
import org.apache.olingo.commons.api.edm.EdmPrimitiveType;
|
||||
import org.apache.olingo.commons.api.edm.EdmPrimitiveTypeException;
|
||||
import org.apache.olingo.commons.api.edm.EdmProperty;
|
||||
import org.apache.olingo.commons.api.edm.EdmType;
|
||||
import org.apache.olingo.commons.api.http.HttpStatusCode;
|
||||
import org.apache.olingo.server.api.ODataApplicationException;
|
||||
import org.apache.olingo.server.api.uri.UriParameter;
|
||||
|
||||
public class Util {
|
||||
|
||||
public static Entity findEntity(EdmEntityType edmEntityType, EntityCollection entitySet,
|
||||
List<UriParameter> keyParams) {
|
||||
|
||||
List<Entity> entityList = entitySet.getEntities();
|
||||
|
||||
// loop over all entities in order to find that one that matches
|
||||
// all keys in request e.g. contacts(ContactID=1, CompanyID=1)
|
||||
for (Entity entity : entityList) {
|
||||
boolean foundEntity = entityMatchesAllKeys(edmEntityType, entity, keyParams);
|
||||
if (foundEntity) {
|
||||
return entity;
|
||||
}
|
||||
}
|
||||
|
||||
return null;
|
||||
}
|
||||
|
||||
public static boolean entityMatchesAllKeys(EdmEntityType edmEntityType, Entity rt_entity,
|
||||
List<UriParameter> keyParams) {
|
||||
|
||||
// loop over all keys
|
||||
for (final UriParameter key : keyParams) {
|
||||
// key
|
||||
String keyName = key.getName();
|
||||
String keyText = key.getText();
|
||||
|
||||
// note: below line doesn't consider: keyProp can be part of a complexType in V4
|
||||
// in such case, it would be required to access it via getKeyPropertyRef()
|
||||
// but since this isn't the case in our model, we ignore it in our implementation
|
||||
EdmProperty edmKeyProperty = (EdmProperty) edmEntityType.getProperty(keyName);
|
||||
// Edm: we need this info for the comparison below
|
||||
Boolean isNullable = edmKeyProperty.isNullable();
|
||||
Integer maxLength = edmKeyProperty.getMaxLength();
|
||||
Integer precision = edmKeyProperty.getPrecision();
|
||||
Boolean isUnicode = edmKeyProperty.isUnicode();
|
||||
Integer scale = edmKeyProperty.getScale();
|
||||
// get the EdmType in order to compare
|
||||
EdmType edmType = edmKeyProperty.getType();
|
||||
// if(EdmType instanceof EdmPrimitiveType) // do we need this?
|
||||
EdmPrimitiveType edmPrimitiveType = (EdmPrimitiveType) edmType;
|
||||
|
||||
// Runtime data: the value of the current entity
|
||||
// don't need to check for null, this is done in FWK
|
||||
Object valueObject = rt_entity.getProperty(keyName).getValue();
|
||||
// TODO if the property is a complex type
|
||||
|
||||
// now need to compare the valueObject with the keyText String
|
||||
// this is done using the type.valueToString
|
||||
String valueAsString = null;
|
||||
try {
|
||||
valueAsString = edmPrimitiveType.valueToString(valueObject, isNullable,
|
||||
maxLength, precision, scale, isUnicode);
|
||||
} catch (EdmPrimitiveTypeException e) {
|
||||
return false; // TODO proper Exception handling
|
||||
}
|
||||
|
||||
if (valueAsString == null) {
|
||||
return false;
|
||||
}
|
||||
|
||||
boolean matches = valueAsString.equals(keyText);
|
||||
// if any of the key properties is not found in the entity, we don't need to search further
|
||||
if (!matches) {
|
||||
return false;
|
||||
}
|
||||
// if the given key value is found in the current entity, continue with the next key
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Example:
|
||||
* For the following navigation: DemoService.svc/Categories(1)/Products
|
||||
* we need the EdmEntitySet for the navigation property "Products"
|
||||
*
|
||||
* This is defined as follows in the metadata:
|
||||
* <code>
|
||||
*
|
||||
* <EntitySet Name="Categories" EntityType="OData.Demo.Category">
|
||||
* <NavigationPropertyBinding Path="Products" Target="Products"/>
|
||||
* </EntitySet>
|
||||
* </code>
|
||||
* The "Target" attribute specifies the target EntitySet
|
||||
* Therefore we need the startEntitySet "Categories" in order to retrieve the target EntitySet "Products"
|
||||
*/
|
||||
public static EdmEntitySet getNavigationTargetEntitySet(EdmEntitySet startEntitySet,
|
||||
EdmNavigationProperty edmNavigationProperty)
|
||||
throws ODataApplicationException {
|
||||
|
||||
EdmEntitySet navigationTargetEntitySet = null;
|
||||
|
||||
String navPropName = edmNavigationProperty.getName();
|
||||
EdmBindingTarget edmBindingTarget = startEntitySet.getRelatedBindingTarget(navPropName);
|
||||
if (edmBindingTarget == null) {
|
||||
throw new ODataApplicationException("Not supported.",
|
||||
HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
|
||||
}
|
||||
|
||||
if (edmBindingTarget instanceof EdmEntitySet) {
|
||||
navigationTargetEntitySet = (EdmEntitySet) edmBindingTarget;
|
||||
} else {
|
||||
throw new ODataApplicationException("Not supported.",
|
||||
HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
|
||||
}
|
||||
|
||||
return navigationTargetEntitySet;
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,75 @@
|
|||
/*
|
||||
* Licensed to the Apache Software Foundation (ASF) under one
|
||||
* or more contributor license agreements. See the NOTICE file
|
||||
* distributed with this work for additional information
|
||||
* regarding copyright ownership. The ASF licenses this file
|
||||
* to you under the Apache License, Version 2.0 (the
|
||||
* "License"); you may not use this file except in compliance
|
||||
* with the License. You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing,
|
||||
* software distributed under the License is distributed on an
|
||||
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
||||
* KIND, either express or implied. See the License for the
|
||||
* specific language governing permissions and limitations
|
||||
* under the License.
|
||||
*/
|
||||
package myservice.mynamespace.web;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.util.ArrayList;
|
||||
|
||||
import javax.servlet.ServletException;
|
||||
import javax.servlet.http.HttpServlet;
|
||||
import javax.servlet.http.HttpServletRequest;
|
||||
import javax.servlet.http.HttpServletResponse;
|
||||
import javax.servlet.http.HttpSession;
|
||||
|
||||
import myservice.mynamespace.data.Storage;
|
||||
import myservice.mynamespace.service.DemoEdmProvider;
|
||||
import myservice.mynamespace.service.DemoEntityCollectionProcessor;
|
||||
import myservice.mynamespace.service.DemoEntityProcessor;
|
||||
import myservice.mynamespace.service.DemoPrimitiveProcessor;
|
||||
|
||||
import org.apache.olingo.server.api.OData;
|
||||
import org.apache.olingo.server.api.ODataHttpHandler;
|
||||
import org.apache.olingo.server.api.ServiceMetadata;
|
||||
import org.apache.olingo.server.api.edmx.EdmxReference;
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
||||
public class DemoServlet extends HttpServlet {
|
||||
|
||||
private static final long serialVersionUID = 1L;
|
||||
private static final Logger LOG = LoggerFactory.getLogger(DemoServlet.class);
|
||||
|
||||
@Override
|
||||
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
|
||||
try {
|
||||
HttpSession session = req.getSession(true);
|
||||
Storage storage = (Storage) session.getAttribute(Storage.class.getName());
|
||||
if (storage == null) {
|
||||
storage = new Storage();
|
||||
session.setAttribute(Storage.class.getName(), storage);
|
||||
}
|
||||
|
||||
// create odata handler and configure it with EdmProvider and Processor
|
||||
OData odata = OData.newInstance();
|
||||
ServiceMetadata edm = odata.createServiceMetadata(new DemoEdmProvider(), new ArrayList<EdmxReference>());
|
||||
ODataHttpHandler handler = odata.createHandler(edm);
|
||||
handler.register(new DemoEntityCollectionProcessor(storage));
|
||||
handler.register(new DemoEntityProcessor(storage));
|
||||
handler.register(new DemoPrimitiveProcessor(storage));
|
||||
|
||||
// let the handler do the work
|
||||
handler.process(req, resp);
|
||||
} catch (RuntimeException e) {
|
||||
LOG.error("Server Error occurred in DemoServlet", e);
|
||||
throw new ServletException(e);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,34 @@
|
|||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<!--
|
||||
Licensed to the Apache Software Foundation (ASF) under one
|
||||
or more contributor license agreements. See the NOTICE file
|
||||
distributed with this work for additional information
|
||||
regarding copyright ownership. The ASF licenses this file
|
||||
to you under the Apache License, Version 2.0 (the
|
||||
"License"); you may not use this file except in compliance
|
||||
with the License. You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing,
|
||||
software distributed under the License is distributed on an
|
||||
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
||||
KIND, either express or implied. See the License for the
|
||||
specific language governing permissions and limitations
|
||||
under the License.
|
||||
-->
|
||||
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
|
||||
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
|
||||
|
||||
<servlet>
|
||||
<servlet-name>DemoServlet</servlet-name>
|
||||
<servlet-class> myservice.mynamespace.web.DemoServlet</servlet-class>
|
||||
<load-on-startup>1</load-on-startup>
|
||||
</servlet>
|
||||
|
||||
<servlet-mapping>
|
||||
<servlet-name>DemoServlet</servlet-name>
|
||||
<url-pattern>/DemoService.svc/*</url-pattern>
|
||||
</servlet-mapping>
|
||||
</web-app>
|
||||
|
|
@ -0,0 +1,43 @@
|
|||
<!--
|
||||
|
||||
Licensed to the Apache Software Foundation (ASF) under one
|
||||
or more contributor license agreements. See the NOTICE file
|
||||
distributed with this work for additional information
|
||||
regarding copyright ownership. The ASF licenses this file
|
||||
to you under the Apache License, Version 2.0 (the
|
||||
"License"); you may not use this file except in compliance
|
||||
with the License. You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing,
|
||||
software distributed under the License is distributed on an
|
||||
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
||||
KIND, either express or implied. See the License for the
|
||||
specific language governing permissions and limitations
|
||||
under the License.
|
||||
|
||||
-->
|
||||
<html>
|
||||
<body>
|
||||
<h2>Hello World!</h2>
|
||||
<a href="DemoService.svc/">OData Olingo V4 Demo Service - Expand and Select</a>
|
||||
<h3>Sample Links</h3>
|
||||
<ul>
|
||||
<li>
|
||||
<a href="DemoService.svc/Products(1)/?$expand=Category">Expand - /Products(1)/?$expand=Category</a>
|
||||
</li>
|
||||
<li>
|
||||
<a href="DemoService.svc/Products/?$expand=Category">Expand - /Products/?$expand=Category</a>
|
||||
</li>
|
||||
<li>
|
||||
<a href="DemoService.svc/Categories(1)/?$expand=Products">Expand - /Categories(1)/?$expand=Products</a>
|
||||
</li>
|
||||
<li>
|
||||
<a href="DemoService.svc/Categories/?$expand=Products">Expand - /DemoService.svc/Categories/?$expand=Products</a>
|
||||
</li>
|
||||
</ul>
|
||||
|
||||
|
||||
</body>
|
||||
</html>
|
||||
|
|
@ -39,7 +39,8 @@
|
|||
<module>p2_readep</module>
|
||||
<module>p3_write</module>
|
||||
<module>p4_navigation</module>
|
||||
<module>p5_queryoptions</module>
|
||||
<module>p5_queryoptions-tis</module>
|
||||
<module>p6_queryoptions-es</module>
|
||||
</modules>
|
||||
|
||||
<build>
|
||||
|
|
|
|||
Loading…
Reference in New Issue