GZIPUtils.java

/*
 * 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 azkaban.utils;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

import org.apache.commons.io.IOUtils;

public class GZIPUtils {
	
	public static byte[] gzipString(String str, String encType) throws IOException {
		byte[] stringData = str.getBytes(encType);
		
		return gzipBytes(stringData);
	}
	
	public static byte[] gzipBytes(byte[] bytes) throws IOException {
		return gzipBytes(bytes, 0, bytes.length);
	}
	
	public static byte[] gzipBytes(byte[] bytes, int offset, int length) throws IOException {
		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(byte[] bytes) throws IOException {
		ByteArrayInputStream byteInputStream = new ByteArrayInputStream(bytes);
		GZIPInputStream gzipInputStream = new GZIPInputStream(byteInputStream);
		
		ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream();
		IOUtils.copy(gzipInputStream, byteOutputStream);

		return byteOutputStream.toByteArray();
	}
	
	public static String unGzipString(byte[] bytes, String encType) throws IOException {
		byte[] response = unGzipBytes(bytes);
		return new String(response, encType);
	}
}