com.bigdata.relation.rule
Class IN<T>

java.lang.Object
  com.bigdata.relation.rule.IN<T>

All Implemented Interfaces:

IConstraint, Serializable

public class IN<T>
extends Object
implements IConstraint

A constraint that a variable may only take on the bindings enumerated by some set.

Version:

$Id: IN.java 2265 2009-10-26 12:51:06Z thompsonbry $

Author:

Bryan Thompson

See Also:

Serialized Form

TODO:

This uses binary search, which is thread-safe. It could aslo use a HashSet, but the HashSet needs to be thread-safe since the filter could be applied concurrently during evaluation.

Constructor Summary

IN(IVariable<T> x, IConstant<T>[] set)

Method Summary

boolean

accept(IBindingSet bindingSet)

Methods inherited from class java.lang.Object

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

Constructor Detail

IN

public IN(IVariable<T> x,
          IConstant<T>[] set)

Parameters:

x - Some variable.

set - A set of legal term identifiers providing a constraint on the allowable values for that variable.

Method Detail

accept

public boolean accept(IBindingSet bindingSet)

Specified by:

accept in interface IConstraint