1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.tika.io; 18 19 import java.io.InputStream; 20 21 /** 22 * Proxy stream that prevents the underlying input stream from being closed. 23 * <p> 24 * This class is typically used in cases where an input stream needs to be 25 * passed to a component that wants to explicitly close the stream even if 26 * more input would still be available to other components. 27 * 28 * @since Apache Tika 0.4, copied from Commons IO 1.4 29 */ 30 public class CloseShieldInputStream extends ProxyInputStream { 31 32 /** 33 * Creates a proxy that shields the given input stream from being 34 * closed. 35 * 36 * @param in underlying input stream 37 */ 38 public CloseShieldInputStream(InputStream in) { 39 super(in); 40 } 41 42 /** 43 * Replaces the underlying input stream with a {@link ClosedInputStream} 44 * sentinel. The original input stream will remain open, but this proxy 45 * will appear closed. 46 */ 47 @Override 48 public void close() { 49 in = new ClosedInputStream(); 50 } 51 52 }