org.eclipse.winery.accountability.blockchain.util.CompressionUtils.java Source code

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Here is the source code for org.eclipse.winery.accountability.blockchain.util.CompressionUtils.java

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/*******************************************************************************
 * Copyright (c) 2018 Contributors to the Eclipse Foundation
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0, or the Apache Software License 2.0
 * which is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 *******************************************************************************/
package org.eclipse.winery.accountability.blockchain.util;

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;

/**
 * Provide methods that allow compression and decompression of byte arrays
 */
public class CompressionUtils {
    public static byte[] compress(byte[] content) {
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        try {
            GZIPOutputStream gzipOutputStream = new GZIPOutputStream(byteArrayOutputStream);
            gzipOutputStream.write(content);
            gzipOutputStream.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        System.out.printf("Compressiono %f\n", (1.0f * content.length / byteArrayOutputStream.size()));
        return byteArrayOutputStream.toByteArray();
    }

    public static byte[] decompress(byte[] contentBytes) {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        try {
            IOUtils.copy(new GZIPInputStream(new ByteArrayInputStream(contentBytes)), out);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        return out.toByteArray();
    }
}