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package com.sun.tools.jxc.gen.config;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
/**
*
*
* @version $Id: NGCCHandler.java,v 1.9 2002/09/29 02:55:48 okajima Exp $
* @author Kohsuke Kawaguchi ([email protected])
*/
public abstract class NGCCHandler implements NGCCEventReceiver {
protected NGCCHandler( NGCCEventSource source, NGCCHandler parent, int parentCookie ) {
_parent = parent;
_source = source;
_cookie = parentCookie;
}
/**
* Parent NGCCHandler, if any.
* If this is the root handler, this field will be null.
*/
protected final NGCCHandler _parent;
/**
* Event source.
*/
protected final NGCCEventSource _source;
/**
* This method will be implemented by the generated code
* and returns a reference to the current runtime.
*/
protected abstract NGCCRuntime getRuntime();
/**
* Cookie assigned by the parent.
*
* This value will be passed to the onChildCompleted handler
* of the parent.
*/
protected final int _cookie;
// used to copy parameters to (enter|leave)(Element|Attribute) events.
//protected String localName,uri,qname;
/**
* Notifies the completion of a child object.
*
* @param result
* The parsing result of the child state.
* @param cookie
* The cookie value passed to the child object
* when it is created.
* @param needAttCheck
* This flag is true when the callee needs to call the
* processAttribute method to check attribute transitions.
* This flag is set to false when this method is triggered by
* attribute transition.
*/
protected abstract void onChildCompleted( Object result, int cookie, boolean needAttCheck ) throws SAXException;
//
//
// spawns a new child object from event handlers.
//
//
public void spawnChildFromEnterElement( NGCCEventReceiver child,
String uri, String localname, String qname, Attributes atts) throws SAXException {
int id = _source.replace(this,child);
_source.sendEnterElement(id,uri,localname,qname,atts);
}
public void spawnChildFromEnterAttribute( NGCCEventReceiver child,
String uri, String localname, String qname) throws SAXException {
int id = _source.replace(this,child);
_source.sendEnterAttribute(id,uri,localname,qname);
}
public void spawnChildFromLeaveElement( NGCCEventReceiver child,
String uri, String localname, String qname) throws SAXException {
int id = _source.replace(this,child);
_source.sendLeaveElement(id,uri,localname,qname);
}
public void spawnChildFromLeaveAttribute( NGCCEventReceiver child,
String uri, String localname, String qname) throws SAXException {
int id = _source.replace(this,child);
_source.sendLeaveAttribute(id,uri,localname,qname);
}
public void spawnChildFromText( NGCCEventReceiver child,
String value) throws SAXException {
int id = _source.replace(this,child);
_source.sendText(id,value);
}
//
//
// reverts to the parent object from the child handler
//
//
public void revertToParentFromEnterElement( Object result, int cookie,
String uri,String local,String qname, Attributes atts ) throws SAXException {
int id = _source.replace(this,_parent);
_parent.onChildCompleted(result,cookie,true);
_source.sendEnterElement(id,uri,local,qname,atts);
}
public void revertToParentFromLeaveElement( Object result, int cookie,
String uri,String local,String qname ) throws SAXException {
if(uri==NGCCRuntime.IMPOSSIBLE && uri==local && uri==qname && _parent==null )
// all the handlers are properly finalized.
// quit now, because we don't have any more NGCCHandler.
// see the endDocument handler for detail
return;
int id = _source.replace(this,_parent);
_parent.onChildCompleted(result,cookie,true);
_source.sendLeaveElement(id,uri,local,qname);
}
public void revertToParentFromEnterAttribute( Object result, int cookie,
String uri,String local,String qname ) throws SAXException {
int id = _source.replace(this,_parent);
_parent.onChildCompleted(result,cookie,true);
_source.sendEnterAttribute(id,uri,local,qname);
}
public void revertToParentFromLeaveAttribute( Object result, int cookie,
String uri,String local,String qname ) throws SAXException {
int id = _source.replace(this,_parent);
_parent.onChildCompleted(result,cookie,true);
_source.sendLeaveAttribute(id,uri,local,qname);
}
public void revertToParentFromText( Object result, int cookie,
String text ) throws SAXException {
int id = _source.replace(this,_parent);
_parent.onChildCompleted(result,cookie,true);
_source.sendText(id,text);
}
//
//
// error handler
//
//
public void unexpectedEnterElement(String qname) throws SAXException {
getRuntime().unexpectedX('<'+qname+'>');
}
public void unexpectedLeaveElement(String qname) throws SAXException {
getRuntime().unexpectedX("');
}
public void unexpectedEnterAttribute(String qname) throws SAXException {
getRuntime().unexpectedX('@'+qname);
}
public void unexpectedLeaveAttribute(String qname) throws SAXException {
getRuntime().unexpectedX("/@"+qname);
}
}
