com.doculibre.constellio.feedprotocol.parse.xml.FeedEntityResolver.java Source code

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Here is the source code for com.doculibre.constellio.feedprotocol.parse.xml.FeedEntityResolver.java

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/**
 * Constellio, Open Source Enterprise Search
 * Copyright (C) 2010 DocuLibre inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package com.doculibre.constellio.feedprotocol.parse.xml;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.commons.io.IOUtils;
import org.springframework.core.io.ClassPathResource;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;

public class FeedEntityResolver implements EntityResolver {

    private static final ClassPathResource DTD_PATH = new ClassPathResource("gsafeed.dtd",
            FeedEntityResolver.class);

    private static final FeedEntityResolver INSTANCE = new FeedEntityResolver();
    private final byte[] byteArray;

    private FeedEntityResolver() {
        InputStream inputStream = null;
        try {
            inputStream = DTD_PATH.getInputStream();
            if (inputStream == null) {
                throw new IOException("Could not find : " + DTD_PATH.getPath());
            }
            byteArray = IOUtils.toByteArray(inputStream);
        } catch (IOException ioe) {
            ioe.printStackTrace();
            throw new RuntimeException(ioe);
        } finally {
            IOUtils.closeQuietly(inputStream);
        }
    }

    public static FeedEntityResolver getInstance() {
        return INSTANCE;
    }

    public InputSource resolveEntity(String publicId, String systemId) {
        return new InputSource(new InputStreamReader(new ByteArrayInputStream(byteArray)));
    }
}