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/facttable/FactTableAccessor.java
* @throws IOException
	 */
	int find( DimensionKey key ) throws IOException
	{
		int result = binarySearch( key );
		if ( result >= 0 )
		{
			return result;
		}
		if ( diskMemberArray != null )
		{
			return traverseFind( key );
		}
		return result;
	}
	
	/**
	 * 
	 * @param key
	 * @return
	 */
	private int binarySearch( DimensionKey key )
	{
		int result = Arrays.binarySearch( memberArray, key );
		if( result >= 0 )
		{
			return memberArray[result].getDimensionPos();
		}
		return -1;