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/api/CubeQueryExecutorHelper.java
{
	Object value;
	Object index;
	public ValueObject( Object value, Object index )
	{
		this.value = value;
		this.index = index;
	}
	public int compareTo( Object obj )
	{
		if ( obj instanceof ValueObject )
		{
			ValueObject objValue = (ValueObject) obj;
			return CompareUtil.compare( value, objValue.value );
		}
		return -1;
	}
}
/**
 * 
 */
class MultiKey implements Comparable