Bug 211839 String grouping unit type needs to support interval range.
Build ID: I20071101-2000 As Chart has supported, the String grouping unit type can be set interval range, the interval range means that the string group will base on row count distinction. For instance, let's say we have a,b,c,d,e,f,g , and set interval range to 2, the grouping result should be a,c,e,g. Now it is a requirement that DtE support the grouping type.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/transform/group/GroupCalculationUtil.java
}
	public BaseQuery getQuery( )
	{
		return this.query;
	}
	/**
	 * This method is used to filter out the GroupBoundaryInfo instances that
	 * are marked as "not accepted" from GroupBoundaryInfos.
	 * 
	 * @param groupArray
	 * @return
	 */
	List[] filterGroupBoundaryInfos( List[] groupArray )
	{
		List[] result = new List[groupArray.length];
		for ( int i = 0; i < result.length; i++ )
		{
			result[i] = new CachedList( resultPopoulator.getSession( ).getTempDir( ), GroupBoundaryInfo.getCreator( ) );
		}
		for ( int i = 0; i < groupArray.length; i++ )
		{
			for ( int j = 0; j < groupArray[i].size( ); j++ )
			{
				if ( ( (GroupBoundaryInfo) groupArray[i].get( j ) ).isAccpted( ) )
				{
					result[i].add( groupArray[i].get( j ) );
				}
			}
		}
		return result;