[OLINGO-211] Preliminary Servlet
Only a prototype to give back metadata and service document
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@ -44,6 +44,11 @@
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<groupId>org.apache.olingo</groupId>
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<artifactId>olingo-commons-core</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>javax.servlet-api</artifactId>
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<version>${servlet.version}</version>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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@ -0,0 +1,86 @@
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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 org.apache.olingo.server.core.servlet;
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import java.io.IOException;
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import java.io.InputStream;
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import javax.servlet.ServletOutputStream;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.olingo.server.api.edm.provider.EdmProvider;
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import org.apache.olingo.server.api.serializer.ODataFormat;
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import org.apache.olingo.server.api.serializer.ODataSerializer;
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import org.apache.olingo.server.core.ODataServerImpl;
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import org.apache.olingo.server.core.edm.provider.EdmProviderImpl;
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public class ODataServlet extends HttpServlet {
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private static final long serialVersionUID = 1L;
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private HttpServletResponse resp;
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@Override
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protected void service(final HttpServletRequest req, final HttpServletResponse resp) throws IOException {
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this.resp = resp;
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EdmProvider provider = createEdmProvider();
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EdmProviderImpl edm = new EdmProviderImpl(provider);
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ODataServerImpl impl = new ODataServerImpl();
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InputStream responseEntity = null;
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if (req.getPathInfo().contains("$metadata")) {
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ODataSerializer serializer = impl.getSerializer(ODataFormat.XML);
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responseEntity = serializer.metadataDocument(edm);
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} else {
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ODataSerializer serializer = impl.getSerializer(ODataFormat.JSON);
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responseEntity = serializer.serviceDocument(edm, "http//:root");
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}
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sendResponse(responseEntity);
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}
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protected EdmProvider createEdmProvider() {
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return null;
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}
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// TODO: check throws
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private void sendResponse(Object entity) throws IOException {
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resp.setStatus(200);
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resp.setContentType("application/json");
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if (entity != null) {
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ServletOutputStream out = resp.getOutputStream();
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int curByte = -1;
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if (entity instanceof InputStream) {
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while ((curByte = ((InputStream) entity).read()) != -1) {
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out.write((char) curByte);
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}
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((InputStream) entity).close();
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} else if (entity instanceof String) {
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String body = (String) entity;
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out.write(body.getBytes("utf-8"));
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}
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out.flush();
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out.close();
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}
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}
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}
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