helper.PdfText.java Source code

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Here is the source code for helper.PdfText.java

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/*
 * Copyright 2014 hbz NRW (http://www.hbz-nrw.de/)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package helper;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.util.PDFTextStripper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.parser.PdfReaderContentParser;
import com.itextpdf.text.pdf.parser.SimpleTextExtractionStrategy;
import com.itextpdf.text.pdf.parser.TextExtractionStrategy;

/**
 * provides text extraction with itext and pdfbox.
 * 
 * @author Jan Schnasse schnasse@hbz-nrw.de
 * 
 */
public class PdfText {

    final static Logger logger = LoggerFactory.getLogger(PdfText.class);

    /**
     * @param pdfFile this file will be extracted.
     * @return the plain text of the pdf
     */
    public String toString(InputStream pdfFile) {
        PDDocument doc = null;
        try {

            doc = PDDocument.load(pdfFile);
            PDFTextStripper stripper = new PDFTextStripper();
            String text = stripper.getText(doc);
            return text;
        } catch (IOException e) {
            throw new HttpArchiveException(500, e);
        } catch (Exception e) {
            throw new HttpArchiveException(500, e);
        } finally {
            if (doc != null) {
                try {
                    doc.close();
                } catch (IOException e) {
                    logger.warn("", e);
                }
            }
        }
    }

    /**
     * @param pdfFile this file will be extracted.
     * @return the plain text of the pdf
     */
    public String itext(File pdfFile) {

        PdfReader reader;
        try {
            reader = new PdfReader(pdfFile.getAbsolutePath());
            PdfReaderContentParser parser = new PdfReaderContentParser(reader);
            StringBuffer buf = new StringBuffer();
            TextExtractionStrategy strategy;
            for (int i = 1; i <= reader.getNumberOfPages(); i++) {
                strategy = parser.processContent(i, new SimpleTextExtractionStrategy());
                buf.append(strategy.getResultantText());
            }

            return buf.toString();
        } catch (IOException e) {
            throw new HttpArchiveException(500, e);
        }

    }
}