/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.http.impl.client.cache;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.Serializable;
  
  import org.apache.http.Header;
  import org.apache.http.HttpEntity;
  import org.apache.http.annotation.Contract;
  import org.apache.http.annotation.ThreadingBehavior;
  import org.apache.http.client.cache.HttpCacheEntry;
  import org.apache.http.protocol.HTTP;
  import org.apache.http.util.Args;
  
  @Contract(threading = ThreadingBehavior.IMMUTABLE)
  class CacheEntity implements HttpEntity, Serializable {
  
      private static final long serialVersionUID = -3467082284120936233L;
  
      private final HttpCacheEntry cacheEntry;
  
      public CacheEntity(final HttpCacheEntry cacheEntry) {
          super();
          this.cacheEntry = cacheEntry;
      }
  
      @Override
      public Header getContentType() {
          return this.cacheEntry.getFirstHeader(HTTP.CONTENT_TYPE);
      }
  
      @Override
      public Header getContentEncoding() {
          return this.cacheEntry.getFirstHeader(HTTP.CONTENT_ENCODING);
      }
  
      @Override
      public boolean isChunked() {
          return false;
      }
  
      @Override
      public boolean isRepeatable() {
          return true;
      }
  
      @Override
      public long getContentLength() {
          return this.cacheEntry.getResource().length();
      }
  
      @Override
      public InputStream getContent() throws IOException {
          return this.cacheEntry.getResource().getInputStream();
      }
  
      @Override
      public void writeTo(final OutputStream outStream) throws IOException {
          Args.notNull(outStream, "Output stream");
          final InputStream inStream = this.cacheEntry.getResource().getInputStream();
          try {
              IOUtils.copy(inStream, outStream);
          } finally {
              inStream.close();
          }
      }
  
      @Override
      public boolean isStreaming() {
          return false;
      }
  
     @Override
     public void consumeContent() throws IOException {
     }
 
     @Override
     public Object clone() throws CloneNotSupportedException {
         return super.clone();
     }
 
 }