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OpenStack Java API

There is a newer version: 3.2.0

package org.openstack4j.core.transport;

import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.annotation.JsonRootName;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;

/**
 * Default Jackson Mappings
 * 
 * @author Jeremy Unruh
 */
public class ObjectMapperSingleton  {

    private static final ObjectMapperSingleton INSTANCE = new ObjectMapperSingleton();
    
    ObjectMapper mapper;
    ObjectMapper rootMapper;

    private ObjectMapperSingleton() {

        mapper = new ObjectMapper();

        mapper.setSerializationInclusion(Include.NON_NULL);
        mapper.enable(SerializationFeature.INDENT_OUTPUT);
        mapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
        mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);

        rootMapper = new ObjectMapper();
        rootMapper.setSerializationInclusion(Include.NON_NULL);
        rootMapper.enable(SerializationFeature.INDENT_OUTPUT);
        rootMapper.enable(SerializationFeature.WRAP_ROOT_VALUE);
        rootMapper.enable(DeserializationFeature.UNWRAP_ROOT_VALUE);
        rootMapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
        rootMapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
    }
    

    public static ObjectMapper getContext(Class type) {
        return type.getAnnotation(JsonRootName.class) == null ? INSTANCE.mapper : INSTANCE.rootMapper;
    }

}