| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| package org.apache.commons.compress.compressors.deflate64; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.commons.compress.compressors.CompressorInputStream; |
| import org.apache.commons.compress.utils.InputStreamStatistics; |
| |
| import static org.apache.commons.compress.utils.IOUtils.closeQuietly; |
| |
| /** |
| * Deflate64 decompressor. |
| * |
| * @since 1.16 |
| * @NotThreadSafe |
| */ |
| public class Deflate64CompressorInputStream extends CompressorInputStream implements InputStreamStatistics { |
| private InputStream originalStream; |
| private HuffmanDecoder decoder; |
| private long compressedBytesRead; |
| private final byte[] oneByte = new byte[1]; |
| |
| /** |
| * Constructs a Deflate64CompressorInputStream. |
| * |
| * @param in the stream to read from |
| */ |
| public Deflate64CompressorInputStream(InputStream in) { |
| this(new HuffmanDecoder(in)); |
| originalStream = in; |
| } |
| |
| Deflate64CompressorInputStream(HuffmanDecoder decoder) { |
| this.decoder = decoder; |
| } |
| |
| /** |
| * @throws java.io.EOFException if the underlying stream is exhausted before the end of defalted data was reached. |
| */ |
| @Override |
| public int read() throws IOException { |
| while (true) { |
| int r = read(oneByte); |
| switch (r) { |
| case 1: |
| return oneByte[0] & 0xFF; |
| case -1: |
| return -1; |
| case 0: |
| continue; |
| default: |
| throw new IllegalStateException("Invalid return value from read: " + r); |
| } |
| } |
| } |
| |
| /** |
| * @throws java.io.EOFException if the underlying stream is exhausted before the end of defalted data was reached. |
| */ |
| @Override |
| public int read(byte[] b, int off, int len) throws IOException { |
| int read = -1; |
| if (decoder != null) { |
| read = decoder.decode(b, off, len); |
| compressedBytesRead = decoder.getBytesRead(); |
| count(read); |
| if (read == -1) { |
| closeDecoder(); |
| } |
| } |
| return read; |
| } |
| |
| @Override |
| public int available() throws IOException { |
| return decoder != null ? decoder.available() : 0; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| try { |
| closeDecoder(); |
| } finally { |
| if (originalStream != null) { |
| originalStream.close(); |
| originalStream = null; |
| } |
| } |
| } |
| |
| /** |
| * @since 1.17 |
| */ |
| @Override |
| public long getCompressedCount() { |
| return compressedBytesRead; |
| } |
| |
| private void closeDecoder() { |
| closeQuietly(decoder); |
| decoder = null; |
| } |
| } |