com.itextpdf.text.pdf.XfaXmlLocator Maven / Gradle / Ivy
/*
* $Id: 2facfebfb986e6857b587cce8969f1362ff5cfe5 $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2016 iText Group NV
* Authors: Pavel Alay, Bruno Lowagie, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
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* following permission added to Section 15 as permitted in Section 7(a):
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* Section 5 of the GNU Affero General Public License.
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* or manipulated using iText.
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package com.itextpdf.text.pdf;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.security.XmlLocator;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
/**
* Helps to locate xml stream inside PDF document with Xfa form.
*/
public class XfaXmlLocator implements XmlLocator {
public XfaXmlLocator(PdfStamper stamper) throws DocumentException, IOException {
this.stamper = stamper;
try {
createXfaForm();
} catch (ParserConfigurationException e) {
throw new DocumentException(e);
} catch (SAXException e) {
throw new DocumentException(e);
}
}
private PdfStamper stamper;
private XfaForm xfaForm;
private String encoding;
protected void createXfaForm() throws ParserConfigurationException, SAXException, IOException {
xfaForm = new XfaForm(stamper.getReader());
}
/**
* Gets Document to sign
*/
public Document getDocument() {
return xfaForm.getDomDocument();
}
/**
* Save document as single XML stream in AcroForm.
* @param document signed document
* @throws IOException
* @throws DocumentException
*/
public void setDocument(Document document) throws IOException, DocumentException {
try {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
TransformerFactory tf = TransformerFactory.newInstance();
Transformer trans = tf.newTransformer();
//Convert Document to byte[] to save to PDF
trans.transform(new DOMSource(document), new StreamResult(outputStream));
//Create PdfStream
PdfIndirectReference iref = stamper.getWriter().
addToBody(new PdfStream(outputStream.toByteArray())).getIndirectReference();
stamper.getReader().getAcroForm().put(PdfName.XFA, iref);
} catch (TransformerConfigurationException e) {
throw new DocumentException(e);
} catch (TransformerException e) {
throw new DocumentException(e);
}
}
public String getEncoding() {
return encoding;
}
public void setEncoding(String encoding) {
this.encoding = encoding;
}
}