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/*
* $Id: TagMap.java,v 1.10 2004/12/14 11:25:42 blowagie Exp $
* $Name: $
*
* Copyright 2001, 2002 by Bruno Lowagie.
*
* 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.xml;
import java.util.HashMap;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.Attributes;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import java.io.InputStream;
import org.xml.sax.InputSource;
import com.lowagie.text.*;
/**
* The <CODE>Tags</CODE>-class maps several XHTML-tags to iText-objects.
*/
public class TagMap extends HashMap {
class AttributeHandler extends DefaultHandler {
/** This is a tag */
public static final String TAG = "tag";
/** This is a tag */
public static final String ATTRIBUTE = "attribute";
/** This is an attribute */
public static final String NAME = "name";
/** This is an attribute */
public static final String ALIAS = "alias";
/** This is an attribute */
public static final String VALUE = "value";
/** This is an attribute */
public static final String CONTENT = "content";
/** This is the tagmap using the AttributeHandler */
private HashMap tagMap;
/** This is the current peer. */
private XmlPeer currentPeer;
/**
* Constructs a new SAXiTextHandler that will translate all the events
* triggered by the parser to actions on the <CODE>Document</CODE>-object.
*
* @param tagMap A Hashmap containing XmlPeer-objects
*/
public AttributeHandler(HashMap tagMap) {
super();
this.tagMap = tagMap;
}
/**
* This method gets called when a start tag is encountered.
*
* @param uri the Uniform Resource Identifier
* @param lname the local name (without prefix), or the empty string if Namespace processing is not being performed.
* @param tag the name of the tag that is encountered
* @param attrs the list of attributes
*/
public void startElement(String uri, String lname, String tag, Attributes attrs) {
String name = attrs.getValue(NAME);
String alias = attrs.getValue(ALIAS);
String value = attrs.getValue(VALUE);
if (name != null) {
if(TAG.equals(tag)) {
currentPeer = new XmlPeer(name, alias);
}
else if (ATTRIBUTE.equals(tag)) {
if (alias != null) {
currentPeer.addAlias(name, alias);
}
if (value != null) {
currentPeer.addValue(name, value);
}
}
}
value = attrs.getValue(CONTENT);
if (value != null) {
currentPeer.setContent(value);
}
}
/**
* This method gets called when ignorable white space encountered.
*
* @param ch an array of characters
* @param start the start position in the array
* @param length the number of characters to read from the array
*/
public void ignorableWhitespace(char[] ch, int start, int length) {
// do nothing
}
/**
* This method gets called when characters are encountered.
*
* @param ch an array of characters
* @param start the start position in the array
* @param length the number of characters to read from the array
*/
public void characters(char[] ch, int start, int length) {
// do nothing
}
/**
* This method gets called when an end tag is encountered.
*
* @param uri the Uniform Resource Identifier
* @param lname the local name (without prefix), or the empty string if Namespace processing is not being performed.
* @param tag the name of the tag that ends
*/
public void endElement(String uri, String lname, String tag) {
if (TAG.equals(tag))
tagMap.put(currentPeer.getAlias(), currentPeer);
}
}
/**
* Constructs a TagMap
* @param tagfile the path to an XML file with the tagmap
*/
public TagMap(String tagfile) {
super();
try {
init(TagMap.class.getClassLoader().getResourceAsStream(tagfile));
}catch(Exception e) {
throw new ExceptionConverter(e);
}
}
/**
* Constructs a TagMap.
* @param in An InputStream with the tagmap xml
*/
public TagMap(InputStream in) {
super();
init(in);
}
protected void init(InputStream in) {
try {
SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
parser.parse(new InputSource(in), new AttributeHandler(this));
}
catch(Exception e) {
throw new ExceptionConverter(e);
}
}
}
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