Bug 122306 TOC on group won't be displayed
Description: TOC on group won't be displayed Steps to reproduce: 1.Add a sample datasource and a data with table "CUSTOMERS" 2.Add a table binding with data set 3.Add a group on the table and set the toc expression to "Group" 4.Preview in HTML Expected result: TOC "Group" will be displayed on the TOC pane Actual result: Nothing in the TOC pane
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/parser/EngineIRVisitor.java
VisibilityDesign visibility = new VisibilityDesign( );
			while ( visibilityRulesIterator.hasNext( ) )
			{
				VisibilityRuleDesign hide = createHide( ( HideRuleHandle ) visibilityRulesIterator
						.next( ) );
				visibility.addRule( hide );
			}
			if ( visibility.count( ) == 0 )
			{
				return null;
			}
			return visibility;
		}
		return null;
	}
	/**
	 * Creates the visibility rule( i.e. the hide)
	 * 
	 * @param handle
	 *            the DE's handle
	 * @return the created visibility rule
	 */
	protected VisibilityRuleDesign createHide( HideRuleHandle handle )
	{
		VisibilityRuleDesign rule = new VisibilityRuleDesign( );
		rule.setExpression( createExpression( handle.getExpression( ) ) );
		rule.setFormat( handle.getFormat( ) );
		return rule;
	}
	/**