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/api/impl/ScriptedDesignVisitor.java
{
		boolean hasJavaScript = ( handle.getOnPrepare( ) != null )
				&& ( handle.getOnPrepare( ).length( ) != 0 );
		boolean hasJavaCode = ( handle.getEventHandlerClass( ) != null )
				&& ( handle.getEventHandlerClass( ).length( ) != 0 );
		if ( !hasJavaScript && !hasJavaCode )
			return;
		executionContext.pushHandle( handle );
		try
		{
			RowScriptExecutor.handleOnPrepare( handle, executionContext );
		} finally
		{
			executionContext.popHandle( );
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.api.DesignVisitor#visitReportDesign(org.eclipse.birt.report.model.api.ReportDesignHandle)
	 */
	public void visitReportDesign( ReportDesignHandle handle )
	{
		
		
		SlotHandle pageSlot = handle.getMasterPages( );
		for ( int i = 0; i < pageSlot.getCount( ); i++ )
		{
			apply( pageSlot.get( i ) );
		}