Bug 209126 DataException throws out when set highlight condition in sub-report[0302]
Description: Set highlight condition in sub-report, when "select value..." in the highlight dialog, DataException throws out. Build version:2.3.0.v20071108-0800 Steps to reproduce: 1.Get the attached report design file, which contains a sub-report. 2.Select the inner table, and then go to "highlight" tab in the property editor view to set a highlight rule. When click "select value...", DataException throws out. Error: The expression's value can not be retrieved. An error happened in data type conversion. Can not convert the value of org.eclipse.birt.data.engine.script.DataExceptionMocker@79c17b to Integer type.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/HighlightRuleBuilder.java
gdata = new GridData( );
		gdata.widthHint = 100;
		font.setLayoutData( gdata );
		IChoiceSet fontSet = ChoiceSetFactory.getElementChoiceSet( ReportDesignConstants.STYLE_ELEMENT,
				StyleHandle.FONT_FAMILY_PROP );
		font.setData( fontSet );
		font.setItems( ChoiceSetFactory.getDisplayNamefromChoiceSet( fontSet,
				new AlphabeticallyComparator( ) ) );
		if ( SYSTEM_FONT_LIST != null && SYSTEM_FONT_LIST.length > 0 )
		{
			for ( int i = 0; i < SYSTEM_FONT_LIST.length; i++ )
			{
				font.add( SYSTEM_FONT_LIST[i] );
			}
		}
		font.add( DEFAULT_CHOICE, 0 );
		font.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				updatePreview( );
			}
		} );
		if ( font.getItemCount( ) > 0 )
		{
			font.select( 0 );
		}
		size = new FontSizeBuilder( format, SWT.None );
		if ( designHandle != null )
		{
			size.setDefaultUnit( designHandle.getPropertyHandle( StyleHandle.FONT_SIZE_PROP )