Bug 183308 IllegalArgumentException occurs after insert a empty group on a List report item[0001]
Description: IllegalArgumentException occurs after insert a empty group on a List report item[0001] Build number: 2.2.0.v20070419-0945 Steps to reproduce: 1, Insert a list 2, Insert a group on the list, only specify the Group On: "aa" Expected result: No exception Actual result: IllegalArgumentException occurs Error log: java.lang.IllegalArgumentException: Argument cannot be null at org.eclipse.swt.SWT.error(SWT.java:3483) at org.eclipse.swt.SWT.error(SWT.java:3422) at org.eclipse.swt.SWT.error(SWT.java:3393) at org.eclipse.swt.widgets.Widget.error(Widget.java:432) at org.eclipse.swt.widgets.Text.setText(Text.java:1793) at org.eclipse.birt.report.designer.ui.dialogs.GroupDialog$6.focusLost(GroupDialog.java:485) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:136) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:962)
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
{
				if ( inputGroup.getTOC( ).getStyleName( ) != null )
					tocStyleType.setText( inputGroup.getTOC( ).getStyleName( ) );
			}
		}
		index = getPagebreakBeforeIndex( inputGroup.getPageBreakBefore( ) );
		if ( index < 0 || index >= pagebreakBeforeCombo.getItemCount( ) )
		{
			pagebreakBeforeCombo.setText( inputGroup.getPageBreakBefore( ) );
		}
		else
		{
			pagebreakBeforeCombo.select( index );
		}
		index = getPagebreakAfterIndex( inputGroup.getPageBreakAfter( ) );
		if ( index < 0 || index >= pagebreakAfterCombo.getItemCount( ) )
		{
			pagebreakAfterCombo.setText( inputGroup.getPageBreakAfter( ) );
		}
		else
		{
			pagebreakAfterCombo.select( index );
		}
		index = getPagebreakInsideIndex( inputGroup.getPageBreakInside( ) );
		if ( index < 0 || index >= pagebreakInsideCombo.getItemCount( ) )
		{
			pagebreakInsideCombo.setText( inputGroup.getPageBreakInside( ) );
		}
		else
		{