/*
 * $HeadURL$
 * $Revision$
 * $Date$
 *
 * ====================================================================
 * 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.contrib.compress;

import java.io.IOException;
import java.io.InputStream;
import java.util.zip.GZIPInputStream;

import org.apache.http.HttpEntity;
import org.apache.http.entity.HttpEntityWrapper;

/**
 * Wrapping entity that decompresses {@link #getContent content}.
 *
 *
 * <!-- empty lines above to avoid 'svn diff' context problems -->
 * @version $Revision$
 * 
 * @since 4.0
 */
public class GzipDecompressingEntity extends HttpEntityWrapper {

      public GzipDecompressingEntity(final HttpEntity entity) {
          super(entity);
      }
  
      public InputStream getContent()
          throws IOException, IllegalStateException {

          // the wrapped entity's getContent() decides about repeatability
          InputStream wrappedin = wrappedEntity.getContent();

          return new GZIPInputStream(wrappedin);
      }

      public long getContentLength() {
          // length of ungzipped content not known in advance
          return -1;
      }

} // class GzipDecompressingEntity