Bug 319351 Refactor data set editor pages' codes[28193]
Build Identifier: 20100708 Refactor data set editor pages' codes. Reproducible: Always
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/util/DataSetProvider.java
return null;
		ColumnHintHandle hint = null;
		Iterator iter = handle.getPropertyHandle( DataSetHandle.COLUMN_HINTS_PROP )
				.iterator( );
		while ( iter.hasNext( ) )
		{
			hint = (ColumnHintHandle) iter.next( );
			if ( columnName.equals( hint.getColumnName( ) ) )
			{
				return hint;
			}
		}
		return null;
	}
	/**
	 * To rollback original datasetHandle, clean unused resultset columm
	 * 
	 * @param dataSetHandle
	 * @param dsItemModel
	 */
	private void cleanUnusedResultSetColumn( DataSetHandle dataSetHandle,
			DataSetViewData[] dsItemModel )
	{
		PropertyHandle handle = dataSetHandle.getPropertyHandle( DataSetHandle.RESULT_SET_PROP );
		if ( handle != null && handle.getListValue( ) != null )
		{
			ArrayList list = handle.getListValue( );
			int count = list.size( );
			for ( int n = count - 1; n >= 0; n-- )
			{