org.silverpeas.search.indexEngine.parser.rtfParser.RtfParser.java Source code

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Here is the source code for org.silverpeas.search.indexEngine.parser.rtfParser.RtfParser.java

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/**
 * Copyright (C) 2000 - 2013 Silverpeas
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * As a special exception to the terms and conditions of version 3.0 of
 * the GPL, you may redistribute this Program in connection with Free/Libre
 * Open Source Software ("FLOSS") applications as described in Silverpeas's
 * FLOSS exception.  You should have received a copy of the text describing
 * the FLOSS exception, and it is also available here:
 * "http://www.silverpeas.org/docs/core/legal/floss_exception.html"
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.silverpeas.search.indexEngine.parser.rtfParser;

import com.stratelia.silverpeas.silvertrace.SilverTrace;
import org.silverpeas.search.indexEngine.parser.PipedParser;
import org.apache.commons.io.IOUtils;

import javax.swing.text.Document;
import javax.swing.text.rtf.RTFEditorKit;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.StringReader;
import java.io.Writer;

/**
 * ExcelParser parse an excel file
 * @author $Author: neysseri $
 */

public class RtfParser extends PipedParser {
    /**
     * Pattern used to remove {\*\ts...} RTF keywords, which cause NPE in Java 1.4.
     */
    // private static final Pattern TS_REMOVE_PATTERN =
    // Pattern.compile("\\{\\\\\\*\\\\ts[^\\}]*\\}", Pattern.DOTALL);

    public RtfParser() {
    }

    public void outPutContent(Writer out, String path, String encoding) throws IOException {

        FileInputStream in = null;
        try {
            in = new FileInputStream(path);
            byte[] buffer = new byte[in.available()];
            in.read(buffer, 0, in.available());

            // RTF always uses ASCII, so we don't need to care about the encoding
            String input = new String(buffer);

            // workaround to remove RTF keywords that cause a NPE in Java 1.4
            // this is a known bug in Java 1.4 that was fixed in 1.5
            // please see http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5042109 for
            // the official bug report
            // input = TS_REMOVE_PATTERN.matcher(input).replaceAll("");

            String result = null;
            try {
                // use build in RTF parser from Swing API
                RTFEditorKit rtfEditor = new RTFEditorKit();
                Document doc = rtfEditor.createDefaultDocument();
                rtfEditor.read(new StringReader(input), doc, 0);

                result = doc.getText(0, doc.getLength());
            } catch (Exception e) {
                SilverTrace.warn("indexEngine", "RtfParser.outPutContent()", "", e);
            }

            SilverTrace.debug("indexEngine", "RtfParser.outPutContent", "root.MSG_GEN_EXIT_METHOD", result);

            out.write(result);
        } finally {
            IOUtils.closeQuietly(in);
        }
    }
}