/*
* 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 org.apache.tuscany.sca.databinding.json.jackson;
import org.apache.tuscany.sca.databinding.PullTransformer;
import org.apache.tuscany.sca.databinding.TransformationContext;
import org.apache.tuscany.sca.databinding.TransformationException;
import org.apache.tuscany.sca.databinding.javabeans.JavaBeansDataBinding;
import org.apache.tuscany.sca.databinding.json.JSONDataBinding;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.type.TypeFactory;
import org.codehaus.jackson.type.JavaType;
/**
* @version $Rev: 998006 $ $Date: 2010-09-17 08:38:14 +0100 (Fri, 17 Sep 2010) $
*/
public class JSON2Object implements PullTransformer<Object, Object> {
private ObjectMapper mapper;
public JSON2Object() {
super();
mapper = JacksonHelper.createObjectMapper();
}
public Object transform(Object source, TransformationContext context) {
if (source == null) {
return null;
}
try {
JavaType javaType = TypeFactory.type(context.getTargetDataType().getGenericType());
if (source instanceof String) {
String sourceString = (String) source;
if(sourceString.isEmpty()) {
return sourceString;
} else {
return mapper.readValue((String)source, javaType);
}
} else if (source instanceof JsonNode) {
return mapper.treeToValue((JsonNode)source, context.getTargetDataType().getPhysical());
} else if (source instanceof JsonParser) {
return mapper.readValue((JsonParser)source, javaType);
} else {
return mapper.readValue(source.toString(), javaType);
}
} catch (Exception e) {
throw new TransformationException(e);
}
}
public String getSourceDataBinding() {
return JSONDataBinding.NAME;
}
public String getTargetDataBinding() {
return JavaBeansDataBinding.NAME;
}
public int getWeight() {
return 5000;
}
}