Java tutorial
/* * Copyright 2012 LinkedIn Corp. * * 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 com.cenrise.test.azkaban; import org.apache.commons.io.IOUtils; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.zip.GZIPInputStream; import java.util.zip.GZIPOutputStream; public class GZIPUtils { public static byte[] gzipString(final String str, final String encType) throws IOException { final byte[] stringData = str.getBytes(encType); return gzipBytes(stringData); } public static byte[] gzipBytes(final byte[] bytes) throws IOException { return gzipBytes(bytes, 0, bytes.length); } public static byte[] gzipBytes(final byte[] bytes, final int offset, final int length) throws IOException { final ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream(); GZIPOutputStream gzipStream = null; gzipStream = new GZIPOutputStream(byteOutputStream); gzipStream.write(bytes, offset, length); gzipStream.close(); return byteOutputStream.toByteArray(); } public static byte[] unGzipBytes(final byte[] bytes) throws IOException { final ByteArrayInputStream byteInputStream = new ByteArrayInputStream(bytes); final GZIPInputStream gzipInputStream = new GZIPInputStream(byteInputStream); final ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream(); IOUtils.copy(gzipInputStream, byteOutputStream); return byteOutputStream.toByteArray(); } public static String unGzipString(final byte[] bytes, final String encType) throws IOException { final byte[] response = unGzipBytes(bytes); return new String(response, encType); } public static Object transformBytesToObject(final byte[] data, final EncodingType encType) throws IOException { if (encType == EncodingType.GZIP) { final String jsonString = GZIPUtils.unGzipString(data, "UTF-8"); return JSONUtils.parseJSONFromString(jsonString); } else { final String jsonString = new String(data, "UTF-8"); return JSONUtils.parseJSONFromString(jsonString); } } }