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    
018    package org.apache.commons.codec.binary;
019    
020    import java.io.IOException;
021    import 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     */
031    public 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    }