to.etc.webapp.query

Class QEventListenerSet

java.lang.Object

to.etc.webapp.query.QEventListenerSet

public class QEventListenerSet
extends Object

Used to separate event registration from the data source. An instance of this can be shared by multiple QDataContext factories so that they all share the same registered event handlers.

Author:

Frits Jalvingh Created on Jul 15, 2009

Field Summary

Fields

Modifier and Type	Field and Description
static QEventListenerSet	EMPTY_SET

Constructor Summary

Constructors

Constructor and Description
QEventListenerSet()

Method Summary

Modifier and Type	Method and Description
void	addQueryListener(IQueryListener l) Add a new listener for queries for this source.
void	callOnBeforeQuery(QDataContext dc, QCriteriaQueryBase<?> qc) Calls all listeners in order.
Iterable<IQueryListener>	getListenerIterator() Return an iterator over all registered event listeners.
void	removeQueryListener(IQueryListener l) Remove an earlier-registered query listener.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EMPTY_SET

public static final QEventListenerSet EMPTY_SET

Constructor Detail

QEventListenerSet

public QEventListenerSet()

Method Detail

addQueryListener

public void addQueryListener(IQueryListener l)

Add a new listener for queries for this source. All data sources obtained from this source will use these listeners.

Parameters:

l -

removeQueryListener

public void removeQueryListener(IQueryListener l)

Remove an earlier-registered query listener.

Parameters:

l -

getListenerIterator

public Iterable<IQueryListener> getListenerIterator()

Return an iterator over all registered event listeners.

Returns:

callOnBeforeQuery

public void callOnBeforeQuery(QDataContext dc,
                              QCriteriaQueryBase<?> qc)
                       throws Exception

Calls all listeners in order.

Parameters:

qc -

Throws:

Exception