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

java.lang.Object
  |
  +--uk.ac.bbk.dcs.automed.qproc.functions.Group

All Implemented Interfaces:

BuiltInFunction

Direct Known Subclasses:

GroupCompute

public class Group

extends java.lang.Object

implements BuiltInFunction

Constructor Summary

Group()

Method Summary

int	getArity() Returns the arity of the function.
protected ModifiedArray	grouplist(ModifiedArray list)
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 java.lang.Object

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

Constructor Detail

Group

public Group()

Method Detail

getArity

public int getArity()

Description copied from interface: BuiltInFunction

Returns the arity of the function.

Specified by:

getArity in interface BuiltInFunction

grouplist

protected ModifiedArray grouplist(ModifiedArray list)

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