/*
* This file is part of rockframework.
*
* rockframework 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.
*
* rockframework 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/>;.
*/
package br.net.woodstock.rockframework.office.pdf.impl;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.LinkedList;
import java.util.List;
import br.net.woodstock.rockframework.io.InputOutputStream;
import br.net.woodstock.rockframework.office.pdf.PDFManager;
import br.net.woodstock.rockframework.util.Assert;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfCopy;
import com.itextpdf.text.pdf.PdfImportedPage;
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;
class ITextManager implements PDFManager {
@Override
public InputStream cut(final InputStream source, final int start, final int end) throws IOException {
try {
Assert.notNull(source, "source");
PdfReader reader = new PdfReader(source);
Document document = new Document(reader.getPageSizeWithRotation(1));
InputOutputStream outputStream = new InputOutputStream();
PdfCopy writer = new PdfCopy(document, outputStream);
int pageCount = reader.getNumberOfPages();
Assert.lessOrEqual(start, pageCount, "start");
int endPage = end;
if (endPage > pageCount) {
endPage = pageCount;
}
document.open();
for (int i = start; i <= endPage; i++) {
PdfImportedPage page = writer.getImportedPage(reader, i);
writer.addPage(page);
}
document.close();
writer.close();
reader.close();
return outputStream.getInputStream();
} catch (DocumentException e) {
throw new br.net.woodstock.rockframework.office.DocumentException(e);
}
}
@Override
public InputStream merge(final InputStream[] sources) throws IOException {
try {
Assert.notNull(sources, "sources");
Assert.notEmpty(sources, "sources");
Document document = new Document();
InputOutputStream outputStream = new InputOutputStream();
PdfCopy writer = new PdfCopy(document, outputStream);
document.open();
for (InputStream source : sources) {
PdfReader reader = new PdfReader(source);
int pageCount = reader.getNumberOfPages();
for (int i = 1; i <= pageCount; i++) {
PdfImportedPage page = writer.getImportedPage(reader, i);
writer.addPage(page);
}
reader.close();
}
document.close();
writer.close();
return outputStream.getInputStream();
} catch (DocumentException e) {
throw new br.net.woodstock.rockframework.office.DocumentException(e);
}
}
@Override
public InputStream[] split(final InputStream source, final int size) throws IOException {
try {
Assert.notNull(source, "source");
Assert.greaterThan(size, 0, "size");
PdfReader reader = new PdfReader(source);
int pageCount = reader.getNumberOfPages();
List<InputStream> list = new LinkedList<InputStream>();
Document document = null;
InputOutputStream outputStream = null;
PdfCopy writer = null;
for (int i = 1; i <= pageCount; i++) {
if ((document == null) || (i % size == 0)) {
if (document != null) {
document.close();
writer.close();
list.add(outputStream.getInputStream());
}
document = new Document(reader.getPageSizeWithRotation(1));
outputStream = new InputOutputStream();
writer = new PdfCopy(document, outputStream);
}
PdfImportedPage page = writer.getImportedPage(reader, i);
writer.addPage(page);
}
if (document != null) {
document.close();
writer.close();
list.add(outputStream.getInputStream());
}
reader.close();
return list.toArray(new InputStream[list.size()]);
} catch (DocumentException e) {
throw new br.net.woodstock.rockframework.office.DocumentException(e);
}
}
@Override
public String getText(final InputStream source) throws IOException {
Assert.notNull(source, "source");
PdfReader reader = new PdfReader(source);
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
TextExtractionStrategy strategy = new SimpleTextExtractionStrategy();
int pageCount = reader.getNumberOfPages();
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
PrintWriter writer = new PrintWriter(outputStream);
for (int i = 1; i <= pageCount; i++) {
TextExtractionStrategy result = parser.processContent(i, strategy);
String pageText = result.getResultantText();
writer.println(pageText);
}
reader.close();
writer.close();
String text = new String(outputStream.toByteArray());
return text;
}
@Override
public InputStream[] toImage(final InputStream source, final String format) throws IOException {
throw new UnsupportedOperationException();
}
}