001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.commons.codec.binary;
019
020import java.io.IOException;
021import java.io.InputStream;
022
023/**
024 * Emits three line-feeds '\n' in a row, one at a time, and then EOF.
025 *
026 * Recreates the bug described in CODEC-105.
027 *
028 * @version $Id $
029 * @since 1.5
030 */
031public class Codec105ErrorInputStream extends InputStream {
032    private static final int EOF = -1;
033
034    int countdown = 3;
035
036    @Override
037    public int read() throws IOException {
038        if (this.countdown-- > 0) {
039            return '\n';
040        } else {
041            return EOF;
042        }
043    }
044
045    @Override
046    public int read(final byte b[], final int pos, final int len) throws IOException {
047        if (this.countdown-- > 0) {
048            b[pos] = '\n';
049            return 1;
050        } else {
051            return EOF;
052        }
053    }
054}