com.lowagie.text.pdf.XfdfReader Maven / Gradle / Ivy
/*
*
* Copyright 2004 by Leonard Rosenthol.
*
* 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.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Stack;
import com.lowagie.text.xml.simpleparser.SimpleXMLDocHandler;
import com.lowagie.text.xml.simpleparser.SimpleXMLParser;
/**
* Reads a XFDF.
*
* @author Leonard Rosenthol ([email protected])
*/
public class XfdfReader implements SimpleXMLDocHandler {
// stuff used during parsing to handle state
private boolean foundRoot = false;
private Stack fieldNames = new Stack();
private Stack fieldValues = new Stack();
// storage for the field list and their values
HashMap fields;
/**
* Storage for field values if there's more than one value for a field.
*
* @since 2.1.4
*/
protected HashMap listFields;
// storage for the path to referenced PDF, if any
String fileSpec;
/**
* Reads an XFDF form.
*
* @param filename the file name of the form
* @throws IOException on error
*/
public XfdfReader(String filename) throws IOException {
this(new FileInputStream(filename));
}
public XfdfReader(InputStream fin) throws IOException {
try {
SimpleXMLParser.parse(this, fin);
} finally {
try {
fin.close();
} catch (Exception e) {
}
}
}
/**
* Reads an XFDF form.
*
* @param xfdfIn the byte array with the form
* @throws IOException on error
*/
public XfdfReader(byte xfdfIn[]) throws IOException {
this(new ByteArrayInputStream(xfdfIn));
}
/**
* 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 value.
*
* @param name the fully qualified field name
* @return the field's value
*/
public String getField(String name) {
return (String) 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) {
String field = (String) fields.get(name);
if (field == null) {
return null;
} else {
return field;
}
}
/**
* Gets the field values for a list or null if the field does not
* exist or has no value defined.
*
* @param name the fully qualified field name
* @return the field values or null
* @since 2.1.4
*/
public List getListValues(String name) {
return (List) listFields.get(name);
}
/**
* Gets the PDF file specification contained in the FDF.
*
* @return the PDF file specification contained in the FDF
*/
public String getFileSpec() {
return fileSpec;
}
/**
* Called when a start tag is found.
*
* @param tag the tag name
* @param h the tag's attributes
*/
public void startElement(String tag, HashMap h) {
if (!foundRoot) {
if (!tag.equals("xfdf")) {
throw new RuntimeException("Root element is not Bookmark.");
} else {
foundRoot = true;
}
}
if (tag.equals("xfdf")) {
} else if (tag.equals("f")) {
fileSpec = (String) h.get("href");
} else if (tag.equals("fields")) {
fields = new HashMap(); // init it!
listFields = new HashMap();
} else if (tag.equals("field")) {
String fName = (String) h.get("name");
fieldNames.push(fName);
} else if (tag.equals("value")) {
fieldValues.push("");
}
}
/**
* Called when an end tag is found.
*
* @param tag the tag name
*/
public void endElement(String tag) {
if ("value".equals(tag)) {
StringBuilder fName = new StringBuilder();
for (int k = 0; k < fieldNames.size(); ++k) {
fName.append(".").append((String) fieldNames.elementAt(k));
}
if (fName.charAt(0) == '.') {
fName.deleteCharAt(0);
}
String fNameString = fName.toString();
String fVal = (String) fieldValues.pop();
String old = (String) fields.put(fNameString, fVal);
if (old != null) {
List l = (List) listFields.get(fNameString);
if (l == null) {
l = new ArrayList();
l.add(old);
}
l.add(fVal);
listFields.put(fNameString, l);
}
} else if ("field".equals(tag)) {
if (!fieldNames.isEmpty()) {
fieldNames.pop();
}
}
}
/**
* Called when the document starts to be parsed.
*/
public void startDocument() {
fileSpec = "";
}
/**
* Called after the document is parsed.
*/
public void endDocument() {
}
/**
* Called when a text element is found.
*
* @param str the text element, probably a fragment.
*/
public void text(String str) {
if (fieldNames.isEmpty() || fieldValues.isEmpty())
return;
String val = (String) fieldValues.pop();
val += str;
fieldValues.push(val);
}
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