com.aurel.track.lucene.index.associatedFields.textExctractor.PdfExtractor.java Source code

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Here is the source code for com.aurel.track.lucene.index.associatedFields.textExctractor.PdfExtractor.java

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/**
 * Genji Scrum Tool and Issue Tracker
 * Copyright (C) 2015 Steinbeis GmbH & Co. KG Task Management Solutions
    
 * <a href="http://www.trackplus.com">Genji Scrum Tool</a>
 *
 * This program 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.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

/* $Id:$ */

package com.aurel.track.lucene.index.associatedFields.textExctractor;

import java.io.File;
import java.io.FileInputStream;
import java.io.StringWriter;

import org.apache.commons.lang3.exception.ExceptionUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.pdfbox.pdfparser.PDFParser;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.util.PDFTextStripper;

import com.aurel.track.lucene.index.associatedFields.LuceneFileExtractor.INDEXABLE_EXTENSIONS;

public class PdfExtractor extends SingleExtensionTextExtractor implements ITextExtractor {
    private static final Log LOGGER = LogFactory.getLog(PdfExtractor.class);

    /**
     * Gets the text from file content 
     * @param file
     * @param fileExtension
     * @return
     */
    @Override
    public String getText(File file, String fileExtension) {
        FileInputStream fis = null;
        PDDocument pdDoc = null;
        StringWriter stringWriter = null;
        try {
            fis = new FileInputStream(file);
            PDFParser parser = new PDFParser(fis);
            parser.parse();
            pdDoc = parser.getPDDocument();
            PDFTextStripper stripper = new PDFTextStripper();
            stripper.setLineSeparator("\n");
            stringWriter = new StringWriter();
            stripper.writeText(pdDoc, stringWriter);
            return stringWriter.toString();
        } catch (Exception e) {
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug(
                        "Extracting text from the .pdf  file " + file.getName() + " failed with " + e.getMessage());
                LOGGER.debug(ExceptionUtils.getStackTrace(e));
            }
        } finally {
            try {
                if (stringWriter != null) {
                    stringWriter.close();
                }
            } catch (Exception e) {
            }
            try {
                if (pdDoc != null) {
                    pdDoc.close();
                }
            } catch (Exception e) {
                LOGGER.info("Closing pdDoc for " + file + " failed with " + e.getMessage());
                LOGGER.debug(ExceptionUtils.getStackTrace(e));
            }
            try {
                if (fis != null) {
                    fis.close();
                }
            } catch (Exception e) {
                LOGGER.info("Closing the FileInputStream for " + file + " failed with " + e.getMessage());
            }
        }
        return null;
    }

    /**
     * Gets the file type this text extractor implementation can process
     */
    @Override
    public String getFileType() {
        return INDEXABLE_EXTENSIONS.PDF;
    }

}