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https://issues.apache.org/jira/browse/XERCESJ-1429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13049391#comment-13049391
]
Thiwanka Somasiri commented on XERCESJ-1429:
--------------------------------------------
This is a rough sketch for the AsynchronousDOMParserImpl class:
package org.apache.xerces.parsers;
import org.apache.xerces.util.SymbolTable;
import org.apache.xerces.xni.grammars.XMLGrammarPool;
import org.apache.xerces.xni.parser.XMLParserConfiguration;
import org.w3c.dom.events.Event;
import org.w3c.dom.events.EventListener;
import org.w3c.dom.Document;
import org.w3c.dom.events.*;
import org.w3c.dom.ls.LSInput;
import java.util.HashSet;
/**
* @version $Id: $
*/
public class AsynchronousDOMParserImpl extends DOMParserImpl implements
EventTarget{
//Create the HashSet to hold the event listeners that the users are
subscribed to
private HashSet listenerSet = new HashSet(); // To be added a new data
structure to hold the event type
private DOMParserImpl parser;
private boolean fBusy = false;
private LSInput ls;
//Call the super class constructors - there are four constructors in the
DOMParserImpl class
public AsynchronousDOMParserImpl(String configuration, String schemaType){
super(configuration, schemaType); //Check whether these super()
should be removed or not
parser = new DOMParserImpl(configuration, schemaType);
}
public AsynchronousDOMParserImpl(XMLParserConfiguration config){
super(config);
parser = new DOMParserImpl(config);
}
public AsynchronousDOMParserImpl(SymbolTable symbolTable){
super(symbolTable);
parser = new DOMParserImpl(symbolTable);
}
public AsynchronousDOMParserImpl(SymbolTable symbolTable, XMLGrammarPool
grammarPool){
super(symbolTable, grammarPool);
parser = new DOMParserImpl(symbolTable, grammarPool);
}
public void addEventListener(String type, EventListener listener, boolean
useCapture){
}
public void removeEventListener(String type, EventListener listener,
boolean useCapture){
}
public boolean dispatchEvent(Event evt){
return false;//TODO change the return value
}
public Document parse(LSInput is){
try{
//final LSInput input = is;
ls = is;
//Set the busy flag true before creating the thread - use a
setBusyFlag()
setBusyFlag();
//Instantiate an object from the inner class and start the thread
AsynchronousDOMParserImpl.TestInner target = new
AsynchronousDOMParserImpl.TestInner();
Thread t = new Thread(target);
t.start();
}catch(Exception e){ //TODO apply the proper exception
e.printStackTrace();
}finally{
resetBusyFlag();
}
return null;
}
public void setBusyFlag(){
fBusy = true;
}
public void resetBusyFlag(){
fBusy = false;
}
public boolean getBusy () {
return fBusy;
}
class TestInner implements Runnable{
public void run(){
try{
parser.parse(ls);
}catch(Exception e){ //TODO apply the proper exception
e.printStackTrace();
}finally{
resetBusyFlag();
}
}
}
}
> [GSoC]: Asynchronous LSParser and parseWithContext
> --------------------------------------------------
>
> Key: XERCESJ-1429
> URL: https://issues.apache.org/jira/browse/XERCESJ-1429
> Project: Xerces2-J
> Issue Type: New Feature
> Components: DOM (Level 3 Load & Save)
> Affects Versions: 2.9.1
> Reporter: Michael Glavassevich
> Labels: gsoc2011
>
> The goal of this project is to complete the implementation of the DOM Level 3
> LSParser. Though Xerces has a functional LSParser, there are a couple parts
> of the spec which still need to be implemented. This includes an asynchronous
> [1] version which returns from the parse method immediately and builds the
> DOM tree on another thread as well as parseWithContext [2] which allows a
> document fragment to be parsed and attached to an existing DOM.
> Possible Mentors: Michael Glavassevich
> [1]
> http://www.w3.org/TR/2004/REC-DOM-Level-3-LS-20040407/load-save.html#LS-LSParser
> [2]
> http://www.w3.org/TR/2004/REC-DOM-Level-3-LS-20040407/load-save.html#LS-LSParser-parseWithContext
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