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/*
* 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 java.math.BigDecimal;
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.apache.tuscany.sca.databinding.json.JSONHelper;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.map.ObjectMapper;
/**
* @version $Rev$ $Date$
*/
public class Object2JSON implements PullTransformer<Object, Object> {
public Object2JSON() {
super();
}
public Object transform(Object source, TransformationContext context) {
if (source == null) {
return null;
}
Class<?> targetType = null;
if (context != null && context.getTargetDataType() != null) {
targetType = context.getTargetDataType().getPhysical();
}
if (targetType == null) {
targetType = String.class;
}
try {
if (targetType != null && targetType.isPrimitive()) {
return source;
}
ObjectMapper mapper = JacksonHelper.createObjectMapper(targetType);
String value = mapper.writeValueAsString(source);
if (JsonNode.class.isAssignableFrom(targetType)) {
return JacksonHelper.createJsonParser(value).readValueAsTree();
} else if (targetType == String.class || targetType == Object.class || targetType.isPrimitive()) {
return value;
} else if (targetType == BigDecimal.class) {
return value.toString();
} else if (JsonParser.class.isAssignableFrom(targetType)) {
return JacksonHelper.createJsonParser(value);
} else {
return JSONHelper.toJSON(value, targetType);
}
} catch (Exception e) {
throw new TransformationException(e);
}
}
public String getSourceDataBinding() {
return JavaBeansDataBinding.NAME;
}
public String getTargetDataBinding() {
return JSONDataBinding.NAME;
}
public int getWeight() {
return 5000;
}
}
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