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