Bug 167210 No change in 'TOC Item Expression' after select a group row[0001]
Description: No change in 'TOC Item Expression' after select a group row[0001] Build number: 2.2.0.v20061208-1310 Steps to reproduce: 1, Drag a dataset into layout 2, Select the table and insert a group on it. 3, In New Group, select a row as group row 4, Check the 'TOC Item Expression' Expected result: The row["XXXX"] in 'TOC Item Expression' after selecting 'Group On' Actual result: There is still blank in 'TOC Item Expression' Error log:
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
* @param str
	 * @return
	 */
	private static IChoice[] getIntervalChoiceArray( String[] str )
	{
		List choiceList = new ArrayList( );
		for ( int i = 0; i < intervalChoicesAll.length; i++ )
		{
			for ( int j = 0; j < str.length; j++ )
			{
				if ( intervalChoicesAll[i].getName( ).equals( str[j] ) )
				{
					choiceList.add( intervalChoicesAll[i] );
					break;
				}
			}
		}
		IChoice[] choice = new IChoice[choiceList.size( )];
		return (IChoice[]) choiceList.toArray( choice );
	}
	/**
	 * Get columnDataType
	 * 
	 * @return
	 */
	private Class getColumnType( )
	{
		for ( int i = 0; i < columnList.size( ); i++ )
		{
			Object dataSetItemModel = columnList.get( i );