com.googlecode.html.parsers.DOMParser Maven / Gradle / Ivy
/*
* Copyright 2002-2009 Andy Clark, Marc Guillemot
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package com.googlecode.html.parsers;
import com.googlecode.html.HTMLConfiguration;
import com.googlecode.html.xercesbridge.XercesBridge;
import org.apache.xerces.xni.Augmentations;
import org.apache.xerces.xni.XNIException;
/**
* A DOM parser for HTML documents.
*
* @author Andy Clark
* @version $Id: DOMParser.java,v 1.5 2005/02/14 03:56:54 andyc Exp $
*/
public class DOMParser
/***/
extends org.apache.xerces.parsers.DOMParser {
/***
* // NOTE: It would be better to extend from AbstractDOMParser but // most users will find it
* easier if the API is just like the // Xerces DOM parser. By extending directly from DOMParser,
* // users can register SAX error handlers, entity resolvers, // and the like. -Ac extends
* org.apache.xerces.parsers.AbstractDOMParser { /
***/
//
// Constructors
//
/**
* Returns the parser's sub-version number.
*/
private static int getParserSubVersion() {
try {
String VERSION = XercesBridge.getInstance().getVersion();
int index1 = VERSION.indexOf('.') + 1;
int index2 = VERSION.indexOf('.', index1);
if (index2 == -1) {
index2 = VERSION.length();
}
return Integer.parseInt(VERSION.substring(index1, index2));
} catch (Exception e) {
return -1;
}
} // getParserSubVersion():int
//
// XMLDocumentHandler methods
//
/**
* Default constructor.
*/
public DOMParser() {
super(new HTMLConfiguration());
/*** extending DOMParser ***/
try {
setProperty("http://apache.org/xml/properties/dom/document-class-name",
"org.apache.html.dom.HTMLDocumentImpl");
} catch (org.xml.sax.SAXNotRecognizedException e) {
throw new RuntimeException(
"http://apache.org/xml/properties/dom/document-class-name property not recognized");
} catch (org.xml.sax.SAXNotSupportedException e) {
throw new RuntimeException(
"http://apache.org/xml/properties/dom/document-class-name property not supported");
}
/***
* extending AbstractDOMParser *** fConfiguration.setProperty(
* "http://apache.org/xml/properties/dom/document-class-name",
* "org.apache.html.dom.HTMLDocumentImpl"); /
***/
} // ()
//
// Private static methods
//
/**
* Doctype declaration.
*/
public void doctypeDecl(String root, String pubid, String sysid, Augmentations augs)
throws XNIException {
// NOTE: Xerces HTML DOM implementation (up to and including
// 2.5.0) throws a heirarchy request error exception
// when a doctype node is appended to the tree. So,
// don't insert this node into the tree for those
// versions... -Ac
String VERSION = XercesBridge.getInstance().getVersion();
boolean okay = true;
if (VERSION.startsWith("Xerces-J 2.")) {
okay = getParserSubVersion() > 5;
}
// REVISIT: As soon as XML4J is updated with the latest code
// from Xerces, then this needs to be updated to
// check XML4J's version. -Ac
else if (VERSION.startsWith("XML4J")) {
okay = false;
}
// if okay, insert doctype; otherwise, don't risk it
if (okay) {
super.doctypeDecl(root, pubid, sysid, augs);
}
} // doctypeDecl(String,String,String,Augmentations)
} // class DOMParser