001/* 002 * ==================================================================== 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, 014 * software distributed under the License is distributed on an 015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 016 * KIND, either express or implied. See the License for the 017 * specific language governing permissions and limitations 018 * under the License. 019 * ==================================================================== 020 * 021 * This software consists of voluntary contributions made by many 022 * individuals on behalf of the Apache Software Foundation. For more 023 * information on the Apache Software Foundation, please see 024 * <http://www.apache.org/>. 025 * 026 */ 027 028package org.apache.http.impl.io; 029 030import java.io.InputStream; 031 032/** 033 * @since 4.4 034 */ 035public final class EmptyInputStream extends InputStream { 036 037 public static final EmptyInputStream INSTANCE = new EmptyInputStream(); 038 039 private EmptyInputStream() { 040 } 041 042 @Override 043 public int available() { 044 return 0; 045 } 046 047 @Override 048 public void close() { 049 } 050 051 @Override 052 public void mark(final int readLimit) { 053 } 054 055 @Override 056 public boolean markSupported() { 057 return true; 058 } 059 060 @Override 061 public int read() { 062 return -1; 063 } 064 065 @Override 066 public int read(final byte[] buf) { 067 return -1; 068 } 069 070 @Override 071 public int read(final byte[] buf, final int off, final int len) { 072 return -1; 073 } 074 075 @Override 076 public void reset() { 077 } 078 079 @Override 080 public long skip(final long n) { 081 return 0L; 082 } 083} 084