org.exoplatform.services.document.impl.MSWordDocumentReader.java Source code

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Here is the source code for org.exoplatform.services.document.impl.MSWordDocumentReader.java

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/*
 * Copyright (C) 2009 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.exoplatform.services.document.impl;

import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.usermodel.Range;
import org.exoplatform.commons.utils.SecurityHelper;
import org.exoplatform.services.document.DocumentReadException;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;

import java.io.IOException;
import java.io.InputStream;
import java.security.PrivilegedExceptionAction;
import java.util.Properties;

/**
 * Created by The eXo Platform SAS A parser of Microsoft Word files.
 * 
 * @author <a href="mailto:phunghainam@gmail.com">Phung Hai Nam</a>
 * @author Gennady Azarenkov
 * @version Oct 19, 2005
 */
public class MSWordDocumentReader extends BaseDocumentReader {

    private static final Log LOG = ExoLogger.getLogger("exo.core.component.document.MSWordDocumentReader");

    /**
     * Get the application/msword mime type.
     * 
     * @return The application/msword mime type.
     */
    public String[] getMimeTypes() {
        return new String[] { "application/msword", "application/msworddoc", "application/msworddot" };
    }

    /**
     * Returns only a text from .doc file content.
     * 
     * @param is an input stream with .doc file content.
     * @return The string only with text from file content.
     */
    public String getContentAsText(final InputStream is) throws IOException, DocumentReadException {
        if (is == null) {
            throw new IllegalArgumentException("InputStream is null.");
        }
        String text = "";
        try {
            if (is.available() == 0) {
                return "";
            }

            HWPFDocument doc;
            try {
                doc = SecurityHelper.doPrivilegedIOExceptionAction(new PrivilegedExceptionAction<HWPFDocument>() {
                    public HWPFDocument run() throws Exception {
                        return new HWPFDocument(is);
                    }
                });
            } catch (IOException e) {
                throw new DocumentReadException("Can't open document.", e);
            }

            Range range = doc.getRange();
            text = range.text();
        } finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException e) {
                    if (LOG.isTraceEnabled()) {
                        LOG.trace("An exception occurred: " + e.getMessage());
                    }
                }
            }
        }
        return text.trim();
    }

    public String getContentAsText(InputStream is, String encoding) throws IOException, DocumentReadException {
        // Ignore encoding
        return getContentAsText(is);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.exoplatform.services.document.DocumentReader#getProperties(java.io.
     *      InputStream)
     */
    public Properties getProperties(InputStream is) throws IOException, DocumentReadException {
        POIPropertiesReader reader = new POIPropertiesReader();
        reader.readDCProperties(is);
        return reader.getProperties();
    }

}