org.apache.jackrabbit.spi.commons.query.jsr283.qom
Interface Ordering

All Known Implementing Classes:

OrderingImpl

public interface Ordering

Determines the relative order of two node-tuples by evaluating operand for each.

For a first node-tuple, nt1, for which operand evaluates to v1, and a second node-tuple, nt2, for which operand evaluates to v2:

• If order is Ascending, then:
  • if either v1 is null, v2 is null, or both v1 and v2 are null, the relative order of nt1 and nt2 is implementation determined, otherwise
  • if v1 is a different property type than v2, the relative order of nt1 and nt2 is implementation determined, otherwise
  • if v1 is ordered before v2, then nt1 precedes nt2, otherwise
  • if v1 is ordered after v2, then nt2 precedes nt1, otherwise
  • the relative order of nt1 and nt2 is implementation determined and may be arbitrary.
• Otherwise, if order is Descending, then:
  • if either v1 is null, v2 is null, or both v1 and v2 are null, the relative order of nt1 and nt2 is implementation determined, otherwise
  • if v1 is a different property type than v2, the relative order of nt1 and nt2 is implementation determined, otherwise
  • if v1 is ordered before v2, then nt2 precedes nt1, otherwise
  • if v1 is ordered after v2, then nt1 precedes nt2, otherwise
  • the relative order of nt1 and nt2 is implementation determined and may be arbitrary.

The query is invalid if operand does not evaluate to a scalar value.

Since:

JCR 2.0

Method Summary

DynamicOperand	getOperand() The operand by which to order.
int	getOrder() Gets the order.

Method Detail

getOperand

DynamicOperand getOperand()

The operand by which to order.

Returns:

the operand; non-null

getOrder

int getOrder()

Gets the order.

Returns:

either

• QueryObjectModelConstants.ORDER_ASCENDING or
• QueryObjectModelConstants.ORDER_DESCENDING