Bug 183733 Implement the IScriptOjectClassInfo to provide the class infromation to support the JS code assistant.
Engine should implement the IScriptObjectClassInfo interface to return the class information for script object.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
/**
	 * Add a page break listener.
	 * 
	 * @param listener
	 *            the page break listener.
	 */
	public void addPageBreakListener( IPageBreakListener listener )
	{
		if ( pageBreakListeners == null )
		{
			pageBreakListeners = new ArrayList( );
		}
		pageBreakListeners.add( listener );
	}
	
	/**
	 * Notify page break listeners that page is broken.
	 */
	public void firePageBreakEvent( )
	{
		if ( pageBreakListeners != null )
		{
			for ( int i = 0; i < pageBreakListeners.size( ); i++ )
			{
				( (IPageBreakListener) pageBreakListeners.get( i ) )
						.onPageBreak( );
			}
		}
	}