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
}
				else
				{
					MessageDialog.openInformation( null,
							Messages.getString( "SelectValueDialog.selectValue" ), 
							Messages.getString( "SelectValueDialog.messages.info.selectVauleUnavailable" ) ); 
				}
			}
			else if ( value.equals( actions[1] ) )
			{
				ExpressionBuilder dialog = new ExpressionBuilder( PlatformUI.getWorkbench( )
						.getDisplay( )
						.getActiveShell( ),
						comboWidget.getText( ) );
				if ( expressionProvider == null )
					dialog.setExpressionProvier( new ExpressionProvider( designHandle ) );
				else
					dialog.setExpressionProvier( expressionProvider );
				if ( dialog.open( ) == IDialogConstants.OK_ID )
				{
					newValue = dialog.getResult( );
				}
			}
			else if ( selectionIndex > 3 )
			{
				newValue = "params[\"" + value + "\"]"; 
			}
			if ( newValue != null )
			{
				comboWidget.setText( newValue );