Bug 165624 Provides UI supports for Highlight rule refer to Style element
UI/org.eclipse.birt.report.designer.ui.views/src/org/eclipse/birt/report/designer/internal/ui/views/attributes/provider/HighlightDescriptorProvider.java
Object[] elements = HighlightDescriptorProvider.this.getElements( DEUtil.getInputElements( input ) );
			for ( int i = 0; i < elements.length; i++ )
			{
				if ( elements[i] instanceof DesignElementHandle )
				{
					DesignElementHandle element = (DesignElementHandle) elements[i];
					element.removeListener( listener );
				}
			}
		}
	}
	public String getColumnText( Object element, int columnIndex )
	{
		HighlightRuleHandle handle = (HighlightRuleHandle) element;
		switch ( columnIndex )
		{
			case 0 :
				return Messages.getString( "HighlightHandleProvider.text.Preview" ) 
						+ DEUtil.getFontSize( handle.getFontSize( )
								.getStringValue( ) )
						+ ")"; 
			case 1 :
				
				String exp = resolveNull( handle.getTestExpression( ) ) + " " 
						+ HighlightRuleBuilder.getNameForOperator( handle.getOperator( ) );
				int vv = HighlightRuleBuilder.determineValueVisible( handle.getOperator( ) );
				if ( vv == 1 )
				{
					exp += " " + resolveNull( handle.getValue1( ) ); 
				}