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
previewLabel.redraw( );
			}
		} );
		Composite preview = new Composite( innerParent, SWT.NONE );
		glayout = new GridLayout( );
		preview.setLayout( glayout );
		gdata = new GridData( GridData.FILL_BOTH );
		preview.setLayoutData( gdata );
		lb = new Label( preview, SWT.NONE );
		lb.setText( Messages.getString( "HighlightRuleBuilderDialog.text.Preview" ) ); 
		Composite previewPane = new Composite( preview, SWT.BORDER );
		glayout = new GridLayout( );
		glayout.marginWidth = 0;
		glayout.marginHeight = 0;
		previewPane.setLayout( glayout );
		gdata = new GridData( GridData.FILL_BOTH );
		gdata.heightHint = 60;
		previewPane.setLayoutData( gdata );
		previewLabel = new PreviewLabel( previewPane, 0 );
		previewLabel.setText( Messages.getString( "HighlightRuleBuilderDialog.text.PreviewContent" ) ); 
		gdata = new GridData( GridData.FILL_BOTH );
		previewLabel.setLayoutData( gdata );
		updatePreview( );
		lb = new Label( innerParent, SWT.SEPARATOR | SWT.HORIZONTAL );
		lb.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		if ( handle != null )
		{
			syncViewProperties( );
		}
		else