org.deri.iris.builtins.string
Class StringContainsBuiltin

java.lang.Object
  org.deri.iris.builtins.AbstractBuiltin
      org.deri.iris.builtins.BooleanBuiltin
          org.deri.iris.builtins.string.StringContainsBuiltin

All Implemented Interfaces:

Comparable<IAtom>, IAtom, IBuiltinAtom

public class StringContainsBuiltin
extends BooleanBuiltin

Represents the RIF built-in func:contains as described in http://www.w3.org/TR/xpath-functions/#func-contains. At the moment only Unicode code point collation (http://www.w3.org/2005/xpath-functions/collation/codepoint) is supported.

Field Summary

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

EMPTY_TERM

Constructor Summary

StringContainsBuiltin(ITerm... terms)
Constructor.

Method Summary

protected boolean	computeResult(ITerm[] terms) Compute the result of the comparison.
static boolean	contains(String haystack, String needle, String collation)

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

evaluateTerms

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

StringContainsBuiltin

public StringContainsBuiltin(ITerm... terms)

Constructor.

Parameters:

terms - The terms, where the term at the first position is the haystack, the term at the second position is the needle and the term at the third position is the collation to be used. The haystack is the string being searched for the occurrence of the needle. The needle is the string to be searched for in the haystack.

Throws:

IllegalArgumentException - if one of the terms is null

Method Detail

computeResult

protected boolean computeResult(ITerm[] terms)

Description copied from class: BooleanBuiltin

Compute the result of the comparison.

Specified by:

computeResult in class BooleanBuiltin

Parameters:

terms - The terms

Returns:

The result of the comparison.

contains

public static boolean contains(String haystack,
                               String needle,
                               String collation)