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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.core.databinding.transformers;
import java.util.Map;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.core.UtilityExtensionPoint;
import org.apache.tuscany.sca.databinding.BaseTransformer;
import org.apache.tuscany.sca.databinding.Mediator;
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.interfacedef.DataType;
/**
* This is a special transformer to transform the output from one IDL to the
* other one
*
* @version $Rev$ $Date$
*/
public class Map2MapTransformer extends BaseTransformer<Map, Map> implements PullTransformer<Map, Map> {
private static final String JAVA_MAP = "java:map";
protected Mediator mediator;
public Map2MapTransformer(ExtensionPointRegistry registry) {
super();
this.mediator = registry.getExtensionPoint(UtilityExtensionPoint.class).getUtility(Mediator.class);
}
@Override
public String getSourceDataBinding() {
return JAVA_MAP;
}
@Override
public String getTargetDataBinding() {
return JAVA_MAP;
}
/**
* @see org.apache.tuscany.sca.databinding.BaseTransformer#getSourceType()
*/
@Override
protected Class<Map> getSourceType() {
return Map.class;
}
/**
* @see org.apache.tuscany.sca.databinding.BaseTransformer#getTargetType()
*/
@Override
protected Class<Map> getTargetType() {
return Map.class;
}
/**
* @see org.apache.tuscany.sca.databinding.Transformer#getWeight()
*/
@Override
public int getWeight() {
return 10;
}
@SuppressWarnings("unchecked")
public Map transform(Map sourceMap, TransformationContext context) {
try {
if (sourceMap == null) {
return null;
}
DataType<DataType> sourceType = context.getSourceDataType();
DataType<DataType> targetType = context.getTargetDataType();
Map targetMap = createMap(targetType.getPhysical());
for (Object sourceItem : sourceMap.entrySet()) {
Map.Entry entry = (Map.Entry)sourceItem;
Object targetValue =
mediator.mediate(entry.getValue(), sourceType.getLogical(), targetType.getLogical(), context
.getMetadata());
targetMap.put(entry.getKey(), targetValue);
}
return targetMap;
} catch (Exception e) {
throw new TransformationException(e);
}
}
private Map createMap(Class<?> collectionClass) throws Exception {
return (Map)collectionClass.newInstance();
}
}
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