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
*/
	protected void updateButtons( )
	{
		enableInput( isExpressionOK( ) );
		getOkButton( ).setEnabled( isConditionOK( ) );
	}
	private void enableInput( boolean val )
	{
		boolean val2 = val;
		stylesChooser.setEnabled( val );
		if ( ( !stylesChooser.getText( ).equals( NONE_DISPLAY_TEXT ) )
				|| ( stylesChooser.isEnabled( ) == false ) )
		{
			val2 = false;
		}
		applyLocalFormat.setEnabled( val2 );
		font.setEnabled( val2 );
		size.setEnabled( val2 );
		color.setEnabled( val2 );
		bold.setEnabled( val2 );
		italic.setEnabled( val2 );
		underline.setEnabled( val2 );
		linethrough.setEnabled( val2 );
		backColor.setEnabled( val2 );
		operator.setEnabled( val );
		
		if ( valueVisible != 3 )
		{
			if ( expressionValue1 != null && ( !expressionValue1.isDisposed( ) ) )
				expressionValue1.setEnabled( val );