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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.impl;
import org.apache.tuscany.sca.databinding.DataPipe;
import org.apache.tuscany.sca.databinding.DataPipeTransformer;
import org.apache.tuscany.sca.databinding.PullTransformer;
import org.apache.tuscany.sca.databinding.PushTransformer;
import org.apache.tuscany.sca.databinding.TransformationContext;
/**
* A utility class to connect PushTransformer and DataPipe to create a
* PullTransformer
*
* @param <S> Source type
* @param <I> Intermediate type
* @param <R> Result type
*
* @version $Rev$ $Date$
*/
public class PipedTransformer<S, I, R> implements PullTransformer<S, R> {
private PushTransformer<S, I> pusher;
private DataPipeTransformer<I, R> pipe;
/**
* @param pumper
* @param pipe
*/
public PipedTransformer(PushTransformer<S, I> pumper, DataPipeTransformer<I, R> pipe) {
super();
this.pusher = pumper;
this.pipe = pipe;
}
public R transform(S source, TransformationContext context) {
DataPipe<I, R> dataPipe = pipe.newInstance();
pusher.transform(source, dataPipe.getSink(), context);
return dataPipe.getResult();
}
public String getSourceDataBinding() {
return pusher.getSourceDataBinding();
}
public String getTargetDataBinding() {
return pipe.getTargetDataBinding();
}
public int getWeight() {
return pusher.getWeight() + pipe.getWeight();
}
}
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