The following issue has been updated:
Updater: Lucian Holland (mailto:[EMAIL PROTECTED])
Date: Tue, 4 May 2004 9:30 AM
Comment:
Proposed patch removing "optimisation" from dispatchEventToSubtree altogether as it
stops the event reaching many listeners who should receive it.
Changes:
Attachment changed to diff.txt
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For a full history of the issue, see:
http://issues.apache.org/jira/browse/XERCESJ-941?page=history
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View the issue:
http://issues.apache.org/jira/browse/XERCESJ-941
Here is an overview of the issue:
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Key: XERCESJ-941
Summary: DOM Events Module: event notification of "indirect" insertions
Type: Bug
Status: Open
Project: Xerces2-J
Components:
DOM
Versions:
2.6.2
Assignee: Xerces-J Developers Mailing List
Reporter: Martin Bernauer
Created: Tue, 6 Apr 2004 7:59 AM
Updated: Tue, 4 May 2004 9:30 AM
Environment: Operating System: Windows XP
Platform: PC
Description:
When inserting a subtree, e.g., <b><c>444</c></b> as child of document element
<a>, and registering an event listener for event type
DOMNodeInsertedIntoDocument, one would expect the DOM implementation to report
the insertions of element b, element c, and the text node containing 444.
In my above defined environment, this only happens if the event listener is
registered on the document element. When registered on the document itself, the
indirect insertions of element c and text node containing 444 are not reported.
I have enclosed a sample application and its ouput below.
Regards,
Martin
---------- sample application ----------
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.apache.xml.serialize.OutputFormat;
import org.apache.xml.serialize.XMLSerializer;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
import org.w3c.dom.events.EventListener;
import org.w3c.dom.events.EventTarget;
import org.w3c.dom.events.MutationEvent;
public class DOMEventTest
implements EventListener
{
/**
*
* @param args
* @throws Exception
*/
public static void main(String[] args)
throws Exception
{
DOMEventTest test = new DOMEventTest();
}
/**
*
* @throws Exception
*/
public DOMEventTest()
throws Exception
{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
// Initialize document
Document doc = builder.newDocument();
doc.appendChild(doc.createElement("a"));
// Alternative 1: register event listener on the document itself
((EventTarget) doc).addEventListener("DOMCharacterDataModified", this,
true);
((EventTarget) doc).addEventListener("DOMNodeInserted", this, true);
((EventTarget) doc).addEventListener("DOMNodeInsertedIntoDocument",
this, true);
// Manipulate document
manipulateDocument(doc);
System.out.println("\n----------\n");
// Initialize document
doc = builder.newDocument();
doc.appendChild(doc.createElement("a"));
// Alternative 2: register event listener on the document element
Element elt = doc.getDocumentElement();
((EventTarget) elt).addEventListener("DOMCharacterDataModified", this,
true);
((EventTarget) elt).addEventListener("DOMNodeInserted", this, true);
((EventTarget) elt).addEventListener("DOMNodeInsertedIntoDocument",
this, true);
// Manipulate document
manipulateDocument(doc);
System.out.println("\n----------\n");
OutputFormat format = new OutputFormat(doc);
XMLSerializer output = new XMLSerializer(System.out, format);
output.serialize(doc);
}
void manipulateDocument(Document doc)
{
Element elt = doc.getDocumentElement();
/*
elt.appendChild(doc.createTextNode("111"));
Text txt = (Text) elt.appendChild(doc.createTextNode("222"));
txt.setData("333");
*/
elt = doc.createElement("b");
elt.appendChild(doc.createElement("c")).appendChild(doc.createTextNode("444"));
doc.getDocumentElement().appendChild(elt);
}
/**
*
*/
public void handleEvent(org.w3c.dom.events.Event inEvt)
{
if (!(inEvt instanceof MutationEvent))
return;
MutationEvent evt = (MutationEvent) inEvt;
StringBuffer res = new StringBuffer();
res.append("[" + evt.getType() + "]\n");
res.append(" prevValue:" + evt.getPrevValue() + "\n");
res.append(" newValue:" + evt.getNewValue() + "\n");
Node targetNode = (Node) evt.getTarget();
if (targetNode != null)
{
res.append(" targetNodeType:");
switch (targetNode.getNodeType())
{
case Node.ELEMENT_NODE: res.append("ELEMENT_NODE");
break;
case Node.ATTRIBUTE_NODE:
res.append("ATTRIBUTE_NODE"); break;
case Node.TEXT_NODE: res.append("TEXT_NODE"); break;
default: res.append("##OTHER");
}
res.append("\n");
res.append(" targetNodeName:" + targetNode.getNodeName() +
"\n");
}
Node relatedNode = evt.getRelatedNode();
if (relatedNode != null)
res.append(" relatedNodeName:" + relatedNode.getNodeName() +
"\n");
System.out.print(res.toString());
}
}
---------- Output ----------
[DOMNodeInserted]
prevValue:null
newValue:null
targetNodeType:ELEMENT_NODE
targetNodeName:b
relatedNodeName:a
----------
[DOMNodeInserted]
prevValue:null
newValue:null
targetNodeType:ELEMENT_NODE
targetNodeName:b
relatedNodeName:a
[DOMNodeInsertedIntoDocument]
prevValue:null
newValue:null
targetNodeType:ELEMENT_NODE
targetNodeName:b
[DOMNodeInsertedIntoDocument]
prevValue:null
newValue:null
targetNodeType:ELEMENT_NODE
targetNodeName:c
[DOMNodeInsertedIntoDocument]
prevValue:null
newValue:null
targetNodeType:TEXT_NODE
targetNodeName:#text
----------
<?xml version="1.0" encoding="UTF-8"?>
<a><b><c>444</c></b></a>
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