uk.ac.bbk.dcs.automed.qproc.functions
Class SetUnion

java.lang.Object
  uk.ac.bbk.dcs.automed.qproc.functions.SortDistinct
      uk.ac.bbk.dcs.automed.qproc.functions.SetUnion

All Implemented Interfaces:

BuiltInFunction

public class SetUnion
extends SortDistinct

Constructor Summary

SetUnion()

Method Summary

int	getArity() Returns the arity of the function.
Cell	perform(Cell[] args, Evaluator e) Returns a Cell object that is the root of a graph that represents the result of applying the built-in function to the arguments args.

Methods inherited from class uk.ac.bbk.dcs.automed.qproc.functions.SortDistinct

removeDuplicates

Methods inherited from class java.lang.Object

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

Constructor Detail

SetUnion

public SetUnion()

Method Detail

getArity

public int getArity()

Description copied from interface: BuiltInFunction

Returns the arity of the function.

Specified by:

getArity in interface BuiltInFunction

Overrides:

getArity in class SortDistinct

perform

public Cell perform(Cell[] args,
                    Evaluator e)

Description copied from interface: BuiltInFunction

Returns a Cell object that is the root of a graph that represents the result of applying the built-in function to the arguments args. Uses the Evaluator e to evaluate any sub-queries that need to be evaluated.

Specified by:

perform in interface BuiltInFunction

Overrides:

perform in class SortDistinct