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
return titleArea;
	}
	private Composite createDummy( Composite parent, int colSpan )
	{
		Composite dummy = new Composite( parent, SWT.NONE );
		GridData gdata = new GridData( );
		gdata.widthHint = 22;
		gdata.horizontalSpan = colSpan;
		gdata.heightHint = 10;
		dummy.setLayoutData( gdata );
		return dummy;
	}
	private Button createToggleButton( Composite parent )
	{
		Composite wrapper = new Composite( parent, 0 );
		GridLayout layout = new GridLayout( );
		layout.marginWidth = 0;
		layout.horizontalSpacing = 0;
		wrapper.setLayout( layout );
		Button btn = new Button( wrapper, SWT.TOGGLE );
		GridData gdata = new GridData( );
		gdata.widthHint = 22;
		gdata.heightHint = 22;
		btn.setLayoutData( gdata );
		return btn;
	}
	private void updatePreview( )
	{
		if ( stylesChooser.getText( ).equals( NONE_DISPLAY_TEXT ) )
		{