code: /*
   * 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.commons.io.input;
  
  import java.io.InputStream;
  
  /**
   * Proxy stream that prevents the underlying input stream from being closed.
   * <p>
   * This class is typically used in cases where an input stream needs to be
   * passed to a component that wants to explicitly close the stream even if
   * more input would still be available to other components.
   *
   * @version $Id: CloseShieldInputStream.java,v 1.1.2.1.2.1 2011/01/15 20:32:23 caniszczyk Exp $
   * @since Commons IO 1.4
   */
  public class CloseShieldInputStream extends ProxyInputStream {
  
      /**
       * Creates a proxy that shields the given input stream from being
       * closed.
       *
       * @param in underlying input stream
       */
      public CloseShieldInputStream(InputStream in) {
          super(in);
      }
  
      /**
       * Replaces the underlying input stream with a {@link ClosedInputStream}
       * sentinel. The original input stream will remain open, but this proxy
       * will appear closed.
       */
      @Override
      public void close() {
          in = new ClosedInputStream();
      }
  
  }
  