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.commons.io.input; 18 19 import java.io.IOException; 20 import java.io.InputStream; 21 22 /** 23 * This is an alternative to {@link java.io.ByteArrayInputStream} 24 * which removes the synchronization overhead for non-concurrent 25 * access; as such this class is not thread-safe. 26 * 27 * Proxy stream that prevents the underlying input stream from being marked/reset. 28 * <p> 29 * This class is typically used in cases where an input stream that supports 30 * marking needs to be passed to a component that wants to explicitly mark 31 * the stream, but it is not desirable to allow marking of the stream. 32 * </p> 33 * 34 * @since 2.8.0 35 */ 36 public class MarkShieldInputStream extends ProxyInputStream { 37 38 /** 39 * Constructs a proxy that shields the given input stream from being 40 * marked or rest. 41 * 42 * @param in underlying input stream 43 */ 44 public MarkShieldInputStream(final InputStream in) { 45 super(in); 46 } 47 48 @SuppressWarnings("sync-override") 49 @Override 50 public void mark(final int readLimit) { 51 // no-op 52 } 53 54 @Override 55 public boolean markSupported() { 56 return false; 57 } 58 59 @SuppressWarnings("sync-override") 60 @Override 61 public void reset() throws IOException { 62 throw UnsupportedOperationExceptions.reset(); 63 } 64 }