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.compress.compressors.brotli; 019 020import java.io.IOException; 021import java.io.InputStream; 022 023import org.apache.commons.compress.compressors.CompressorInputStream; 024import org.apache.commons.compress.utils.CountingInputStream; 025import org.apache.commons.compress.utils.IOUtils; 026import org.apache.commons.compress.utils.InputStreamStatistics; 027import org.brotli.dec.BrotliInputStream; 028 029/** 030 * {@link CompressorInputStream} implementation to decode Brotli encoded stream. 031 * Library relies on <a href="https://github.com/google/brotli">Google brotli</a> 032 * 033 * @since 1.14 034 */ 035public class BrotliCompressorInputStream extends CompressorInputStream 036 implements InputStreamStatistics { 037 038 private final CountingInputStream countingStream; 039 private final BrotliInputStream decIS; 040 041 public BrotliCompressorInputStream(final InputStream in) throws IOException { 042 decIS = new BrotliInputStream(countingStream = new CountingInputStream(in)); 043 } 044 045 @Override 046 public int available() throws IOException { 047 return decIS.available(); 048 } 049 050 @Override 051 public void close() throws IOException { 052 decIS.close(); 053 } 054 055 @Override 056 public int read(final byte[] b) throws IOException { 057 return decIS.read(b); 058 } 059 060 @Override 061 public long skip(final long n) throws IOException { 062 return IOUtils.skip(decIS, n); 063 } 064 065 @Override 066 public void mark(final int readlimit) { 067 decIS.mark(readlimit); 068 } 069 070 @Override 071 public boolean markSupported() { 072 return decIS.markSupported(); 073 } 074 075 @Override 076 public int read() throws IOException { 077 final int ret = decIS.read(); 078 count(ret == -1 ? 0 : 1); 079 return ret; 080 } 081 082 @Override 083 public int read(final byte[] buf, final int off, final int len) throws IOException { 084 final int ret = decIS.read(buf, off, len); 085 count(ret); 086 return ret; 087 } 088 089 @Override 090 public String toString() { 091 return decIS.toString(); 092 } 093 094 @Override 095 public void reset() throws IOException { 096 decIS.reset(); 097 } 098 099 /** 100 * @since 1.17 101 */ 102 @Override 103 public long getCompressedCount() { 104 return countingStream.getBytesRead(); 105 } 106}