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
}
	private static IChoice[] getIntervalChoicesString( )
	{
		String[] str = new String[]{
				DesignChoiceConstants.INTERVAL_NONE,
				DesignChoiceConstants.INTERVAL_PREFIX,
		};
		return getIntervalChoiceArray( str );
	}
	private static IChoice[] getIntervalChoicesDate( )
	{
		String[] str = new String[]{
				DesignChoiceConstants.INTERVAL_NONE,
				DesignChoiceConstants.INTERVAL_YEAR,
				DesignChoiceConstants.INTERVAL_QUARTER,
				DesignChoiceConstants.INTERVAL_MONTH,
				DesignChoiceConstants.INTERVAL_WEEK,
				DesignChoiceConstants.INTERVAL_DAY,
				DesignChoiceConstants.INTERVAL_HOUR,
				DesignChoiceConstants.INTERVAL_MINUTE,
				DesignChoiceConstants.INTERVAL_SECOND
		};
		return getIntervalChoiceArray( str );
	}
	private static IChoice[] getIntervalChoicesNumeric( )
	{
		String[] str = new String[]{
				DesignChoiceConstants.INTERVAL_NONE,
				DesignChoiceConstants.INTERVAL_INTERVAL,
		};