org.openanzo.glitter.query
Class OrderingCondition

java.lang.Object
  org.openanzo.glitter.query.OrderingCondition

public class OrderingCondition
extends java.lang.Object

A single ordering condition in an ORDER BY clause of a query. This can be any expression paired with either ascending or descending order. The expression is evaluated against pairs of solutions A and B. If the expression evaluates to < 0, then A comes first; if > 0 then B comes first. Otherwise, the results according to this OrderingCondition are undefined.

Author:

lee

Constructor Summary

OrderingCondition(Expression condition)
Sorts the solutions in ascending order.

OrderingCondition(Expression condition, boolean ascending)

Method Summary

Expression	getCondition()
boolean	isAscending()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OrderingCondition

public OrderingCondition(Expression condition,
                         boolean ascending)

Parameters:

condition - How to sort solutions.

ascending - Whether the sort order should be ascending (true) or descending (false)

OrderingCondition

public OrderingCondition(Expression condition)

Sorts the solutions in ascending order.

Parameters:

condition - How to sort solutions.

Method Detail

getCondition

public Expression getCondition()

Returns:

The expression giving the ordering condition.

isAscending

public boolean isAscending()

Returns:

Whether this OrderingCondition sorts ascending or not (descending).