| /* |
| * 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.ant.compress.util; |
| |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| import org.apache.commons.compress.compressors.CompressorInputStream; |
| import org.apache.commons.compress.compressors.CompressorOutputStream; |
| import org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream; |
| import org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorOutputStream; |
| import org.apache.commons.compress.compressors.lz4.FramedLZ4CompressorInputStream; |
| import org.apache.commons.compress.compressors.lz4.FramedLZ4CompressorOutputStream; |
| |
| /** |
| * Creates streams for LZ4 format. |
| * @since Apache Compress Antlib 1.5 |
| * @see <a href="http://lz4.github.io/lz4/">LZ4 Project</a> |
| */ |
| public class LZ4StreamFactory implements CompressorWithConcatenatedStreamsFactory { |
| |
| private boolean framed = true; |
| |
| /** |
| * Whether to use the "frame format". |
| * |
| * <p>Defaults to true.</p> |
| */ |
| public void setFramed(boolean framed) { |
| this.framed = framed; |
| } |
| |
| /** |
| * Whether to use the "frame format". |
| */ |
| protected boolean isFramed() { |
| return framed; |
| } |
| |
| /** |
| * @param stream the stream to read from, should be buffered |
| */ |
| @Override |
| public CompressorInputStream getCompressorStream(InputStream stream) |
| throws IOException { |
| return framed ? new FramedLZ4CompressorInputStream(stream) |
| : (CompressorInputStream) new BlockLZ4CompressorInputStream(stream); |
| } |
| |
| /** |
| * @param stream the stream to read from, should be buffered |
| * @param decompressConcatenated |
| * if true, decompress until the end of the |
| * input; if false, stop after the first |
| * stream |
| */ |
| @Override |
| public CompressorInputStream getCompressorStream(InputStream stream, |
| boolean decompressConcatenated) |
| throws IOException { |
| if (!framed && decompressConcatenated) { |
| throw new UnsupportedOperationException("only the frame format supports" |
| + " concatenated streams"); |
| } |
| return framed ? new FramedLZ4CompressorInputStream(stream, decompressConcatenated) |
| : (CompressorInputStream) new BlockLZ4CompressorInputStream(stream); |
| } |
| |
| /** |
| * @param stream the stream to write to, should be buffered |
| */ |
| @Override |
| public CompressorOutputStream getCompressorStream(OutputStream stream) |
| throws IOException { |
| return framed ? new FramedLZ4CompressorOutputStream(stream) |
| : (CompressorOutputStream) new BlockLZ4CompressorOutputStream(stream); |
| } |
| } |