Bug 192829 Aggregation binding filter doesn't work for crosstab
The filter condition on bindings for Crosstab doesn't take effect. Currently Dte hasn't supported this yet.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/data/impl/aggregation/AggregationExecutor.java
/**
	 * 
	 * @param diskSortedStack
	 * @param levelIndex
	 */
	DiskSortedStackWrapper( DiskSortedStack diskSortedStack, int[] levelIndex )
	{
		this.diskSortedStack = diskSortedStack;
		this.levelIndex = levelIndex;
	}
	/**
	 * 
	 * @return
	 * @throws IOException
	 */
	Object pop( ) throws IOException
	{
		currentObj = diskSortedStack.pop( );
		return currentObj;
	}
	/**
	 * 
	 * @return
	 */
	Object getCurrentObject( )
	{
		return currentObj;
	}
}