Custom ObjectMapper

⚠️ the ObjectMapper was removed in Spring Data Elasticsearch 4.0!

How to use custom ObjectMapper?

1. Create new Class and implement Interface EntityMapper

public class CustomEntityMapper implements EntityMapper {

    public CustomEntityMapper(){
        //custom configuration/implementation (e.g. FasterXML/jackson)
    }

    @Override
    public String mapToString(Object object) throws IOException {
        //mapping Object to String
        return null;
    }

    @Override
    public <T> T mapToObject(String source, Class<T> clazz) throws IOException {
        //mapping String to Object
        return null;
    }
}

2. Define new bean and inject it into ElasticsearchTemplate

    <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"/>

3. Inject your custom implementation to template

<?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">

    <elasticsearch:repositories base-package="com.xyz.acme"/>

    <elasticsearch:transport-client id="client" cluster-nodes="localhost:9300,someip:9300" />

    <bean name="elasticsearchTemplate"
          class="org.springframework.data.elasticsearch.core.ElasticsearchTemplate">
        <constructor-arg name="client" ref="client"/>
        <constructor-arg name="resultsMapper" ref="resultMapper"/>
    </bean>

    <bean name="entityMapper" class="org.springframework.data.elasticsearch.core.DefaultEntityMapper"/>

    <bean name="resultMapper" class="org.springframework.data.elasticsearch.core.CustomResultMapper">
        <constructor-arg ref="entityMapper"/>
    </bean>

</beans>

Default implementation for EntityMapper used in project can be found here https://github.com/spring-projects/spring-data-elasticsearch/blob/master/src/main/java/org/springframework/data/elasticsearch/core/DefaultEntityMapper.java