/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds 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.OutputStream;
import java.security.Key;

import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;

import org.jclouds.io.Payload;

/**
 * 
 * @author Adrian Cole
 */
public abstract class BaseCipherPayload extends DelegatingPayload {

   private final Key key;

   public BaseCipherPayload(Payload delegate, Key key) {
      super(delegate);
      this.key = checkNotNull(key, "key");
   }

   public abstract Cipher initializeCipher(Key key);

   @Override
   public CipherInputStream getInput() {
      return new CipherInputStream(super.getInput(), initializeCipher(key));
   }

   @Override
   public void writeTo(OutputStream outstream) throws IOException {
      super.writeTo(new CipherOutputStream(outstream, initializeCipher(key)));
   }
}
