org.betaconceptframework.astroboa.engine.jcr.io.ContentSourceExtractor.java Source code

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Here is the source code for org.betaconceptframework.astroboa.engine.jcr.io.ContentSourceExtractor.java

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/*
 * Copyright (C) 2005-2012 BetaCONCEPT Limited
 *
 * This file is part of Astroboa.
 *
 * Astroboa is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Astroboa is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Astroboa.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.betaconceptframework.astroboa.engine.jcr.io;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.util.Enumeration;

import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipFile;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 
 * 
 * @author Gregory Chomatas (gchomatas@betaconcept.com)
 * @author Savvas Triantafyllou (striantafyllou@betaconcept.com)
 * 
 */
public class ContentSourceExtractor {

    private File tmpZip;

    private ZipFile zipFile;

    private Logger logger = LoggerFactory.getLogger(getClass());

    public InputStream extractStream(URI contentSource) throws Exception {
        dispose();

        String filename = contentSource.toURL().getFile();

        if (StringUtils.isBlank(filename)) {
            throw new Exception("No file name from URL " + contentSource.toString());
        }

        if (filename.endsWith(".zip")) {
            tmpZip = File.createTempFile("rep", ".zip");

            FileUtils.copyURLToFile(contentSource.toURL(), tmpZip);

            zipFile = new ZipFile(tmpZip);

            Enumeration entries = zipFile.getEntries();

            while (entries.hasMoreElements()) {
                ZipArchiveEntry entry = (ZipArchiveEntry) entries.nextElement();

                if (entry.getName() != null && entry.getName().endsWith(".xml")) {
                    return zipFile.getInputStream(entry);
                }
            }

            return null;
        } else if (filename.endsWith(".xml")) {
            return contentSource.toURL().openStream();
        } else {
            throw new Exception("Unsupported file extension " + filename);
        }
    }

    public void dispose() {
        if (zipFile != null) {
            try {
                zipFile.close();
            } catch (IOException e) {
                logger.error("", e);
            }
        }

        if (tmpZip != null) {
            try {
                tmpZip.delete();
            } catch (Exception e) {
                logger.error("", e);
            }
        }
    }
}