org.drools.rule
Class LiteralConstraint

java.lang.Object
  org.drools.rule.LiteralConstraint

All Implemented Interfaces:

Constraint, FieldConstraint, RuleComponent, java.io.Serializable

public class LiteralConstraint

extends java.lang.Object

implements FieldConstraint

See Also:

Serialized Form

Constructor Summary

LiteralConstraint(FieldValue field, FieldExtractor extractor, Evaluator evaluator)

Method Summary

boolean	equals(java.lang.Object object)
Evaluator	getEvaluator()
FieldValue	getField()
FieldExtractor	getFieldExtractor()
Declaration[]	getRequiredDeclarations() Literal constraints cannot have required declarations, so always return an empty array.
int	hashCode()
boolean	isAllowed(InternalFactHandle handle, Tuple tuple, WorkingMemory workingMemory)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

LiteralConstraint

public LiteralConstraint(FieldValue field,
                         FieldExtractor extractor,
                         Evaluator evaluator)

Method Detail

getEvaluator

public Evaluator getEvaluator()

getField

public FieldValue getField()

getFieldExtractor

public FieldExtractor getFieldExtractor()

getRequiredDeclarations

public Declaration[] getRequiredDeclarations()

Literal constraints cannot have required declarations, so always return an empty array.

Specified by:

getRequiredDeclarations in interface FieldConstraint

Returns:

Return an empty Declaration[]

isAllowed

public boolean isAllowed(InternalFactHandle handle,
                         Tuple tuple,
                         WorkingMemory workingMemory)

Specified by:

isAllowed in interface FieldConstraint

toString

public java.lang.String toString()

hashCode

public int hashCode()

equals

public boolean equals(java.lang.Object object)