core/src/main/java/org/jclouds/io/payloads/DelegatingPayload.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.jclouds.io.payloads;

import static com.google.common.base.Preconditions.checkNotNull;

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

import com.google.common.base.Throwables;

import org.jclouds.io.MutableContentMetadata;
import org.jclouds.io.Payload;

/**
 * 
 * @author Adrian Cole
 */
public class DelegatingPayload implements Payload {

   private final Payload delegate;

   public DelegatingPayload(Payload delegate) {
      this.delegate = checkNotNull(delegate, "delegate");
   }

   /**
    * {@inheritDoc}
    */
   @Override
   public InputStream openStream() throws IOException {
      return delegate.openStream();
   }

   /**
    * {@inheritDoc}
    */
   @Override
   public InputStream getInput() {
      try {
         return openStream();
      } catch (IOException ioe) {
         throw Throwables.propagate(ioe);
      }
   }

   /**
    * {@inheritDoc}
    */
   @Override
   public Object getRawContent() {
      return delegate.getInput();
   }

   /**
    * {@inheritDoc}
    */
   @Override
   public boolean isRepeatable() {
      return delegate.isRepeatable();
   }

   /**
    * {@inheritDoc}
    */
   @Override
   public void writeTo(OutputStream outstream) throws IOException {
      delegate.writeTo(outstream);
   }

   /**
    * {@inheritDoc}
    */
   @Override
   public int hashCode() {
      return delegate.hashCode();
   }

   /**
    * {@inheritDoc}
    */
   @Override
   public boolean equals(Object obj) {
      return delegate.equals(obj);

   }

   public Payload getDelegate() {
      return delegate;
   }

   @Override
   public void release() {
      delegate.release();
   }

   @Override
   public void close() throws IOException {
      delegate.close();
   }

   @Override
   public MutableContentMetadata getContentMetadata() {
      return delegate.getContentMetadata();
   }

   @Override
   public void setContentMetadata(MutableContentMetadata in) {
       delegate.setContentMetadata(in);
   }
}