org.openmrs.module.shr.contenthandler.DataUtil.java Source code

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Here is the source code for org.openmrs.module.shr.contenthandler.DataUtil.java

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/**
 * The contents of this file are subject to the OpenMRS Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://license.openmrs.org
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
 */
package org.openmrs.module.shr.contenthandler;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.zip.GZIPInputStream;
import java.util.zip.Inflater;
import java.util.zip.InflaterInputStream;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.io.IOUtils;

/**
 * Various data utility methods.
 */
public class DataUtil {

    public static byte[] decodeBase64(byte[] content) {
        return Base64.decodeBase64(content);
    }

    public static byte[] fetchPayloadFromURL(String url) throws MalformedURLException, IOException {
        InputStream in = new URL(url).openStream();
        try {
            return IOUtils.toByteArray(in);
        } finally {
            IOUtils.closeQuietly(in);
        }
    }

    public static byte[] uncompressDeflate(byte[] content) throws IOException {
        InflaterInputStream deflateIn = new InflaterInputStream(new ByteArrayInputStream(content),
                new Inflater(true));
        return copyToByteArray(deflateIn);
    }

    public static byte[] uncompressGZip(byte[] content) throws IOException {
        GZIPInputStream gzipIn = new GZIPInputStream(new ByteArrayInputStream(content));
        return copyToByteArray(gzipIn);
    }

    public static byte[] uncompressZLib(byte[] content) throws IOException {
        InflaterInputStream deflateIn = new InflaterInputStream(new ByteArrayInputStream(content));
        return copyToByteArray(deflateIn);
    }

    private static byte[] copyToByteArray(InputStream in) throws IOException {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        IOUtils.copy(in, out);
        return out.toByteArray();
    }
}