core.com.lowagie.text.pdf.FdfReader Maven / Gradle / Ivy
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iText, a free Java-PDF library
/*
* Copyright 2003 by Paulo Soares.
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library 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 Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
/** Reads an FDF form and makes the fields available
* @author Paulo Soares ([email protected])
*/
public class FdfReader extends PdfReader {
HashMap fields;
String fileSpec;
PdfName encoding;
/** Reads an FDF form.
* @param filename the file name of the form
* @throws IOException on error
*/
public FdfReader(String filename) throws IOException {
super(filename);
}
/** Reads an FDF form.
* @param pdfIn the byte array with the form
* @throws IOException on error
*/
public FdfReader(byte pdfIn[]) throws IOException {
super(pdfIn);
}
/** Reads an FDF form.
* @param url the URL of the document
* @throws IOException on error
*/
public FdfReader(URL url) throws IOException {
super(url);
}
/** Reads an FDF form.
* @param is the InputStream containing the document. The stream is read to the
* end but is not closed
* @throws IOException on error
*/
public FdfReader(InputStream is) throws IOException {
super(is);
}
protected void readPdf() throws IOException {
fields = new HashMap();
try {
tokens.checkFdfHeader();
rebuildXref();
readDocObj();
}
finally {
try {
tokens.close();
}
catch (Exception e) {
// empty on purpose
}
}
readFields();
}
protected void kidNode(PdfDictionary merged, String name) {
PdfArray kids = (PdfArray)getPdfObject(merged.get(PdfName.KIDS));
if (kids == null || kids.getArrayList().size() == 0) {
if (name.length() > 0)
name = name.substring(1);
fields.put(name, merged);
}
else {
merged.remove(PdfName.KIDS);
ArrayList ar = kids.getArrayList();
for (int k = 0; k < ar.size(); ++k) {
PdfDictionary dic = new PdfDictionary();
dic.merge(merged);
PdfDictionary newDic = (PdfDictionary)getPdfObject((PdfObject)ar.get(k));
PdfString t = (PdfString)getPdfObject(newDic.get(PdfName.T));
String newName = name;
if (t != null)
newName += "." + t.toUnicodeString();
dic.merge(newDic);
dic.remove(PdfName.T);
kidNode(dic, newName);
}
}
}
protected void readFields() {
catalog = (PdfDictionary)getPdfObject(trailer.get(PdfName.ROOT));
PdfDictionary fdf = (PdfDictionary)getPdfObject(catalog.get(PdfName.FDF));
if (fdf == null)
return;
PdfString fs = (PdfString)getPdfObject(fdf.get(PdfName.F));
if (fs != null)
fileSpec = fs.toUnicodeString();
PdfArray fld = (PdfArray)getPdfObject(fdf.get(PdfName.FIELDS));
if (fld == null)
return;
encoding = (PdfName)getPdfObject(fdf.get(PdfName.ENCODING));
PdfDictionary merged = new PdfDictionary();
merged.put(PdfName.KIDS, fld);
kidNode(merged, "");
}
/** Gets all the fields. The map is keyed by the fully qualified
* field name and the value is a merged PdfDictionary
* with the field content.
* @return all the fields
*/
public HashMap getFields() {
return fields;
}
/** Gets the field dictionary.
* @param name the fully qualified field name
* @return the field dictionary
*/
public PdfDictionary getField(String name) {
return (PdfDictionary)fields.get(name);
}
/** Gets the field value or null if the field does not
* exist or has no value defined.
* @param name the fully qualified field name
* @return the field value or null
*/
public String getFieldValue(String name) {
PdfDictionary field = (PdfDictionary)fields.get(name);
if (field == null)
return null;
PdfObject v = getPdfObject(field.get(PdfName.V));
if (v == null)
return null;
if (v.isName())
return PdfName.decodeName(((PdfName)v).toString());
else if (v.isString()) {
PdfString vs = (PdfString)v;
if (encoding == null || vs.getEncoding() != null)
return vs.toUnicodeString();
byte b[] = vs.getBytes();
if (b.length >= 2 && b[0] == (byte)254 && b[1] == (byte)255)
return vs.toUnicodeString();
try {
if (encoding.equals(PdfName.SHIFT_JIS))
return new String(b, "SJIS");
else if (encoding.equals(PdfName.UHC))
return new String(b, "MS949");
else if (encoding.equals(PdfName.GBK))
return new String(b, "GBK");
else if (encoding.equals(PdfName.BIGFIVE))
return new String(b, "Big5");
}
catch (Exception e) {
}
return vs.toUnicodeString();
}
return null;
}
/** Gets the PDF file specification contained in the FDF.
* @return the PDF file specification contained in the FDF
*/
public String getFileSpec() {
return fileSpec;
}
}