DATAES-29, ISSUE #16 - added interface EntityMapper to allow for custom implementation and configuration for ObjectMapper

src/main/java/org/springframework/data/elasticsearch/core/DefaultEntityMapper.java

@@ -0,0 +1,31 @@
+package org.springframework.data.elasticsearch.core;
+
+import org.codehaus.jackson.map.DeserializationConfig;
+import org.codehaus.jackson.map.ObjectMapper;
+
+import java.io.IOException;
+
+/**
+ * DocumentMapper using jackson
+ *
+ * @author Artur Konczak
+ */
+public class DefaultEntityMapper implements EntityMapper {
+
+    private ObjectMapper objectMapper;
+
+    public DefaultEntityMapper() {
+        objectMapper = new ObjectMapper();
+        objectMapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+    }
+
+    @Override
+    public String mapToString(Object object) throws IOException {
+        return objectMapper.writeValueAsString(object);
+    }
+
+    @Override
+    public <T> T mapToObject(String source, Class<T> clazz) throws IOException {
+        return objectMapper.readValue(source, clazz);
+    }
+}

src/main/java/org/springframework/data/elasticsearch/core/ElasticsearchTemplate.java

@@ -16,8 +16,6 @@
 package org.springframework.data.elasticsearch.core;
 
 import org.apache.commons.collections.CollectionUtils;
-import org.codehaus.jackson.map.DeserializationConfig;
-import org.codehaus.jackson.map.ObjectMapper;
 import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
 import org.elasticsearch.action.admin.indices.mapping.delete.DeleteMappingRequest;
 import org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequestBuilder;
@@ -81,24 +79,30 @@ import static org.springframework.data.elasticsearch.core.MappingBuilder.buildMa
  *
  * @author Rizwan Idrees
  * @author Mohsin Husen
+ * @author Artur Konczak
  */
 
 public class ElasticsearchTemplate implements ElasticsearchOperations {
 
     private Client client;
     private ElasticsearchConverter elasticsearchConverter;
-    private ObjectMapper objectMapper = new ObjectMapper();
+    private EntityMapper entityMapper;
-
-    {
-        objectMapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
-    }
 
     public ElasticsearchTemplate(Client client) {
-        this(client, null);
+        this(client, null, null);
+    }
+
+    public ElasticsearchTemplate(Client client, EntityMapper entityMapper) {
+        this(client, null, entityMapper);
     }
 
     public ElasticsearchTemplate(Client client, ElasticsearchConverter elasticsearchConverter) {
+        this(client, elasticsearchConverter, null);
+    }
+
+    public ElasticsearchTemplate(Client client, ElasticsearchConverter elasticsearchConverter, EntityMapper entityMapper) {
         this.client = client;
+        this.entityMapper = (entityMapper == null) ? new DefaultEntityMapper() : entityMapper;
         this.elasticsearchConverter = (elasticsearchConverter == null) ? new MappingElasticsearchConverter(
                 new SimpleElasticsearchMappingContext()) : elasticsearchConverter;
     }
@@ -509,7 +513,7 @@ public class ElasticsearchTemplate implements ElasticsearchOperations {
                     : query.getType();
 
             IndexRequestBuilder indexRequestBuilder = client.prepareIndex(indexName, type, query.getId()).setSource(
-                    objectMapper.writeValueAsString(query.getObject()));
+                    entityMapper.mapToString(query.getObject()));
 
             if (query.getVersion() != null) {
                 indexRequestBuilder.setVersion(query.getVersion());
@@ -587,7 +591,7 @@ public class ElasticsearchTemplate implements ElasticsearchOperations {
             return null;
         }
         try {
-            return objectMapper.readValue(source, clazz);
+            return entityMapper.mapToObject(source, clazz);
         } catch (IOException e) {
             throw new ElasticsearchException("failed to map source [ " + source + "] to class " + clazz.getSimpleName(), e);
         }
@@ -599,4 +603,7 @@ public class ElasticsearchTemplate implements ElasticsearchOperations {
 
     }
 
+    protected EntityMapper getEntityMapper() {
+        return entityMapper;
+    }
 }

src/main/java/org/springframework/data/elasticsearch/core/EntityMapper.java

@@ -0,0 +1,17 @@
+package org.springframework.data.elasticsearch.core;
+
+import java.io.IOException;
+
+/**
+ * DocumentMapper interface, it will allow to customize how we mapping object to json
+ *
+ * @author Artur Konczak
+ * @author Rizwan Idrees
+ * @author Mohsin Husen
+ */
+public interface EntityMapper {
+
+    public String mapToString(Object object) throws IOException;
+
+    public <T> T mapToObject(String source, Class<T> clazz) throws IOException;
+}

src/test/java/org/springframework/data/elasticsearch/core/CustomEntityMapper.java

@@ -0,0 +1,19 @@
+package org.springframework.data.elasticsearch.core;
+
+import java.io.IOException;
+
+/**
+ * @author Artur Konczak
+ */
+public class CustomEntityMapper implements EntityMapper {
+
+    @Override
+    public String mapToString(Object object) throws IOException {
+        return null;
+    }
+
+    @Override
+    public <T> T mapToObject(String source, Class<T> clazz) throws IOException {
+        return null;
+    }
+}

src/test/java/org/springframework/data/elasticsearch/core/ElasticsearchTemplateCustomMapperTests.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed 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 org.springframework.data.elasticsearch.core;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertThat;
+
+/**
+ * @author Artur Konczak
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration("classpath:elasticsearch-template-custom-mapper.xml")
+public class ElasticsearchTemplateCustomMapperTests {
+
+    @Autowired
+    private ElasticsearchTemplate elasticsearchTemplate;
+
+    @Autowired
+    private EntityMapper entityMapper;
+
+    @Test
+    public void shouldUseCustomMapper() {
+        //given
+        //when
+        //them
+        assertThat(elasticsearchTemplate.getEntityMapper(), is(entityMapper));
+    }
+
+}

src/test/resources/elasticsearch-template-custom-mapper.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:elasticsearch="http://www.springframework.org/schema/data/elasticsearch"
+	xsi:schemaLocation="http://www.springframework.org/schema/data/elasticsearch http://www.springframework.org/schema/data/elasticsearch/spring-elasticsearch-1.0.xsd
+		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
+
+	<import resource="infrastructure.xml" />
+
+	<bean name="elasticsearchTemplate"
+		class="org.springframework.data.elasticsearch.core.ElasticsearchTemplate">
+		<constructor-arg name="client" ref="client" />
+        <constructor-arg name="entityMapper" ref="entityMapper"/>
+	</bean>
+
+    <bean name="entityMapper" class="org.springframework.data.elasticsearch.core.CustomEntityMapper"/>
+
+</beans>