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
int widthMargins = 8;
		final Composite titleArea = new Composite( parent, SWT.NONE );
		FormLayout layout = new FormLayout( );
		layout.marginHeight = heightMargins;
		layout.marginWidth = widthMargins;
		titleArea.setLayout( layout );
		Display display = parent.getDisplay( );
		Color background = JFaceColors.getBannerBackground( display );
		GridData layoutData = new GridData( GridData.FILL_HORIZONTAL );
		layoutData.heightHint = 20 + ( heightMargins * 2 );
		titleArea.setLayoutData( layoutData );
		titleArea.setBackground( background );
		titleArea.addPaintListener( new PaintListener( ) {
			public void paintControl( PaintEvent e )
			{
				e.gc.setForeground( titleArea.getDisplay( )
						.getSystemColor( SWT.COLOR_WIDGET_NORMAL_SHADOW ) );
				Rectangle bounds = titleArea.getClientArea( );
				bounds.height = bounds.height - 2;
				bounds.width = bounds.width - 1;
				e.gc.drawRectangle( bounds );
			}
		} );
		Label label = new Label( titleArea, SWT.NONE );
		label.setBackground( background );
		label.setFont( FontManager.getFont( label.getFont( ).toString( ),
				10,
				SWT.BOLD ) );
		label.setText( Messages.getString( "HighlightRuleBuilderDialog.text.Title" ) ); 
		UIUtil.bindHelp( parent, IHelpContextIds.HIGHLIGHT_RULE_BUILDER_ID );