fr.paris.lutece.plugins.lucene.service.indexer.PdfFileIndexer.java Source code

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Here is the source code for fr.paris.lutece.plugins.lucene.service.indexer.PdfFileIndexer.java

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/*
 * Copyright (c) 2002-2014, Mairie de Paris
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice
 *     and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright notice
 *     and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *
 *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * License 1.0
 */
package fr.paris.lutece.plugins.lucene.service.indexer;

import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;

import org.apache.log4j.Logger;
import org.apache.pdfbox.exceptions.CryptographyException;
import org.apache.pdfbox.exceptions.InvalidPasswordException;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.util.PDFTextStripper;

/**
 * PdfFileIndexer indexes PDF files
 */
public class PdfFileIndexer implements IFileIndexer {
    private static final Logger _log = Logger.getLogger("lutece.indexer");

    /**
     * 
     * {@inheritDoc}
     */
    public String getContentToIndex(InputStream is) {
        String strContent = "";
        PDDocument pdfDocument = null;

        try {
            pdfDocument = PDDocument.load(is);

            if (pdfDocument.isEncrypted()) {
                pdfDocument.decrypt("");
            }

            StringWriter writer = new StringWriter();
            PDFTextStripper stripper = new PDFTextStripper();
            stripper.writeText(pdfDocument, writer);
            strContent = writer.getBuffer().toString();
        } catch (CryptographyException e) {
            _log.error(e.getMessage(), e);
        } catch (IOException e) {
            _log.error(e.getMessage(), e);
        } catch (InvalidPasswordException e) {
            _log.error(e.getMessage(), e);
        } finally {
            if (pdfDocument != null) {
                try {
                    pdfDocument.close();
                } catch (IOException e) {
                    _log.error(e.getMessage(), e);
                }
            }
        }

        return strContent;
    }
}