unreleased/modules/databinding-protobuf/src/main/java/org/apache/tuscany/sca/databinding/protobuf/Protobuf2OutputStream.java

/*
 * 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.protobuf;

import java.io.IOException;
import java.io.OutputStream;

import org.apache.tuscany.sca.databinding.PushTransformer;
import org.apache.tuscany.sca.databinding.TransformationContext;
import org.apache.tuscany.sca.databinding.TransformationException;

import com.google.protobuf.Message;

/**
 * 
 */
public class Protobuf2OutputStream implements PushTransformer<Message, OutputStream> {
    @Override
    public String getSourceDataBinding() {
        return ProtobufDatabinding.NAME;
    }

    @Override
    public String getTargetDataBinding() {
        return "application/x-protobuf" + "#" + OutputStream.class.getName();
    }

    @Override
    public int getWeight() {
        return 10;
    }

    @Override
    public void transform(Message source, OutputStream sink, TransformationContext context) {
        try {
            if (source != null) {
                source.writeTo(sink);
            }
        } catch (IOException e) {
            throw new TransformationException(e);
        }
    }
}