ca.travelagency.utils.ZipUtils.java Source code

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Here is the source code for ca.travelagency.utils.ZipUtils.java

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/**
 *    Copyright (C) 2010 - 2014 VREM Software Development <VREMSoftwareDevelopment@gmail.com>
 *
 *    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 ca.travelagency.utils;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.DataFormatException;
import java.util.zip.Deflater;
import java.util.zip.Inflater;

import com.google.common.base.Charsets;
import com.google.common.io.Closeables;

public abstract class ZipUtils {
    private static final int BUFFER_SIZE = 1024;

    public static byte[] compress(String source) throws IOException {
        ByteArrayOutputStream byteArrayOutputStream = null;
        try {
            byte[] bytes = source.getBytes(Charsets.UTF_8);
            Deflater deflater = new Deflater();
            deflater.setInput(bytes);
            deflater.finish();

            byteArrayOutputStream = new ByteArrayOutputStream(bytes.length);
            byte[] buffer = new byte[1024];
            while (!deflater.finished()) {
                int count = deflater.deflate(buffer);
                byteArrayOutputStream.write(buffer, 0, count);
            }
            return byteArrayOutputStream.toByteArray();
        } finally {
            Closeables.close(byteArrayOutputStream, true);
        }
    }

    public static String uncompress(byte[] source) throws IOException {
        ByteArrayOutputStream byteArrayOutputStream = null;
        try {
            Inflater inflater = new Inflater();
            inflater.setInput(source);

            byteArrayOutputStream = new ByteArrayOutputStream(source.length);
            byte[] buffer = new byte[BUFFER_SIZE];
            while (!inflater.finished()) {
                int count = inflater.inflate(buffer);
                byteArrayOutputStream.write(buffer, 0, count);
            }
            return new String(byteArrayOutputStream.toByteArray(), Charsets.UTF_8);
        } catch (DataFormatException e) {
            throw new IOException(e);
        } finally {
            Closeables.close(byteArrayOutputStream, true);
        }
    }
}