Package org.drools.core.rule.constraint

Class EvaluatorConstraint

java.lang.Object

org.drools.core.rule.MutableTypeConstraint

org.drools.core.rule.constraint.EvaluatorConstraint

All Implemented Interfaces:

Externalizable, Serializable, Cloneable, IntervalProviderConstraint, AlphaNodeFieldConstraint, BetaNodeFieldConstraint, Constraint, RuleComponent

public class EvaluatorConstraint
extends MutableTypeConstraint
implements IntervalProviderConstraint

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	EvaluatorConstraint.LiteralContextEntry

Nested classes/interfaces inherited from interface org.drools.core.spi.Constraint

Constraint.ConstraintType

Field Summary

Fields

Modifier and Type	Field	Description
protected Declaration[]	declarations
protected Evaluator	evaluator
protected FieldValue	field
protected InternalReadAccessor	rightReadAccessor

Constructor Summary

Constructors

Constructor	Description
EvaluatorConstraint()
EvaluatorConstraint(Declaration[] declarations, Evaluator evaluator, InternalReadAccessor extractor)
EvaluatorConstraint(FieldValue field, Evaluator evaluator, InternalReadAccessor extractor)

Method Summary

Modifier and Type	Method	Description
EvaluatorConstraint	clone()	Clones the constraint
ContextEntry	createContextEntry()
boolean	equals(Object o)
Evaluator	getEvaluator()
FieldValue	getField()
Interval	getInterval()
Declaration[]	getRequiredDeclarations()	Returns all the declarations required by the given constraint implementation.
protected InternalReadAccessor	getRightReadAccessor()
int	hashCode()
boolean	isAllowed(InternalFactHandle handle, InternalWorkingMemory workingMemory)
boolean	isAllowedCachedLeft(ContextEntry context, InternalFactHandle handle)
boolean	isAllowedCachedRight(Tuple tuple, ContextEntry context)
protected boolean	isLiteral()
boolean	isSelf()
boolean	isTemporal()	Returns true in case this constraint is a temporal constraint
void	readExternal(ObjectInput in)
void	replaceDeclaration(Declaration oldDecl, Declaration newDecl)	When a rule contains multiple logical branches, i.e., makes use of 'OR' CE, it is required to clone patterns and declarations for each logical branch.
void	writeExternal(ObjectOutput out)

Methods inherited from class org.drools.core.rule.MutableTypeConstraint

cloneIfInUse, getType, setInUse, setType

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.drools.core.spi.Constraint

addPackageNames, equals, getListenedPropertyMask, getPackageNames, getType, mergeEvaluationContext, registerEvaluationContext

Field Detail

declarations

protected Declaration[] declarations

evaluator

protected Evaluator evaluator

rightReadAccessor

protected InternalReadAccessor rightReadAccessor

field

protected FieldValue field

Constructor Detail

EvaluatorConstraint

public EvaluatorConstraint()

EvaluatorConstraint

public EvaluatorConstraint(FieldValue field,
                           Evaluator evaluator,
                           InternalReadAccessor extractor)

EvaluatorConstraint

public EvaluatorConstraint(Declaration[] declarations,
                           Evaluator evaluator,
                           InternalReadAccessor extractor)

Method Detail

isLiteral

protected boolean isLiteral()

isAllowed

public boolean isAllowed(InternalFactHandle handle,
                         InternalWorkingMemory workingMemory)

Specified by:

isAllowed in interface AlphaNodeFieldConstraint

isAllowedCachedLeft

public boolean isAllowedCachedLeft(ContextEntry context,
                                   InternalFactHandle handle)

Specified by:

isAllowedCachedLeft in interface BetaNodeFieldConstraint

isAllowedCachedRight

public boolean isAllowedCachedRight(Tuple tuple,
                                    ContextEntry context)

Specified by:

isAllowedCachedRight in interface BetaNodeFieldConstraint

replaceDeclaration

public void replaceDeclaration(Declaration oldDecl,
                               Declaration newDecl)

Description copied from interface: Constraint

When a rule contains multiple logical branches, i.e., makes use of 'OR' CE, it is required to clone patterns and declarations for each logical branch. Since this is done at ReteOO build type, when constraints were already created, eventually some constraints need to update their references to the declarations.

Specified by:

replaceDeclaration in interface Constraint

getRequiredDeclarations

public Declaration[] getRequiredDeclarations()

Description copied from interface: Constraint

Returns all the declarations required by the given constraint implementation.

Specified by:

getRequiredDeclarations in interface Constraint

Returns:

isTemporal

public boolean isTemporal()

Description copied from interface: Constraint

Returns true in case this constraint is a temporal constraint

Specified by:

isTemporal in interface Constraint

Returns:

isSelf

public boolean isSelf()

getInterval

public Interval getInterval()

Specified by:

getInterval in interface IntervalProviderConstraint

getEvaluator

public Evaluator getEvaluator()

getField

public FieldValue getField()

getRightReadAccessor

protected InternalReadAccessor getRightReadAccessor()

clone

public EvaluatorConstraint clone()

Description copied from interface: Constraint

Clones the constraint

Specified by:

clone in interface Constraint

Specified by:

clone in class MutableTypeConstraint

Returns:

createContextEntry

public ContextEntry createContextEntry()

Specified by:

createContextEntry in interface BetaNodeFieldConstraint

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class MutableTypeConstraint

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class MutableTypeConstraint

Throws:

IOException

ClassNotFoundException

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object