org.imemex.idm
Class AttributeExistsPredicate

java.lang.Object
  org.imemex.predicates.AbstractPredicate
      org.imemex.idm.AttributeExistsPredicate

All Implemented Interfaces:

Predicate

public class AttributeExistsPredicate
extends AbstractPredicate

Checks for the existance of an attribute in a tuple component.

Author:

jens

Nested Class Summary

Nested classes/interfaces inherited from interface org.imemex.predicates.Predicate

Predicate.PredType

Constructor Summary

AttributeExistsPredicate(java.lang.String tuple, java.lang.String attributeName)

Method Summary

Predicate	copy() makes an exact copy of this predicate
<T> boolean	eval(java.util.Map<java.lang.String,T> variableBindings) Evaluates the predicate with the given map of pairs.

Methods inherited from class org.imemex.predicates.AbstractPredicate

equals, getType, getVariables, renameVariable, toString, toXML

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AttributeExistsPredicate

public AttributeExistsPredicate(java.lang.String tuple,
                                java.lang.String attributeName)

Method Detail

copy

public Predicate copy()

Description copied from interface: Predicate

makes an exact copy of this predicate

Returns:

eval

public <T> boolean eval(java.util.Map<java.lang.String,T> variableBindings)
             throws UnboundVariableException

Description copied from interface: Predicate

Evaluates the predicate with the given map of pairs.

Parameters:

variableBindings - - a map that specifies the bindings for the predicate variables.

Returns:

true, if the predicate is true; false, otherwise.

Throws:

UnboundVariableException - - if some variable necessary to evaluate the predicate was not bound.