org.deri.iris.builtins.date
Class DateSubtractBuiltin

java.lang.Object
  org.deri.iris.builtins.AbstractBuiltin
      org.deri.iris.builtins.ArithmeticBuiltin
          org.deri.iris.builtins.SubtractBuiltin
              org.deri.iris.builtins.date.DateSubtractBuiltin

All Implemented Interfaces:

Comparable<IAtom>, IAtom, IBuiltinAtom

public class DateSubtractBuiltin
extends SubtractBuiltin

Represents the RIF built-in function func:subtract-dates.

Field Summary

Fields inherited from class org.deri.iris.builtins.AbstractBuiltin

EMPTY_TERM

Constructor Summary

DateSubtractBuiltin(ITerm... terms)
Creates the built-in for the specified terms.

Method Summary

protected ITerm

computeMissingTerm(int missingTermIndex, ITerm[] terms) Compute the missing term when the other two are known.

Methods inherited from class org.deri.iris.builtins.ArithmeticBuiltin

evaluateTerms, maxUnknownVariables, testForEquality

Methods inherited from class org.deri.iris.builtins.AbstractBuiltin

compareTo, equals, evaluate, getPredicate, getTuple, hashCode, isBuiltin, isGround, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DateSubtractBuiltin

public DateSubtractBuiltin(ITerm... terms)

Creates the built-in for the specified terms.

Parameters:

terms - The terms.

Throws:

NullPointerException - If one of the terms is null.

IllegalArgumentException - If the number of terms submitted is not 3.

Method Detail

computeMissingTerm

protected ITerm computeMissingTerm(int missingTermIndex,
                                   ITerm[] terms)

Description copied from class: ArithmeticBuiltin

Compute the missing term when the other two are known.

Overrides:

computeMissingTerm in class SubtractBuiltin

terms - The collection of all terms.

Returns:

The computed value.