Java tutorial
/* * Licensed 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 io.airlift.compress.gzip; import org.apache.hadoop.io.compress.CompressionInputStream; import java.io.IOException; import java.io.InputStream; import java.util.zip.GZIPInputStream; class HadoopJdkGzipInputStream extends CompressionInputStream { private final byte[] oneByte = new byte[1]; private final GZIPInputStream input; public HadoopJdkGzipInputStream(InputStream input, int bufferSize) throws IOException { super(input); this.input = new GZIPInputStream(input, bufferSize); } @Override public int read() throws IOException { int length = input.read(oneByte, 0, 1); if (length < 0) { return length; } return oneByte[0] & 0xFF; } @Override public int read(byte[] output, int offset, int length) throws IOException { return input.read(output, offset, length); } @Override public void resetState() throws IOException { throw new UnsupportedOperationException("resetState not supported for gzip"); } @Override public void close() throws IOException { try { super.close(); } finally { // close() will free the memory input.close(); } } }