Package org.drools.core.base

Class BaseEvaluator

java.lang.Object

org.drools.core.base.BaseEvaluator

All Implemented Interfaces:

Externalizable, Serializable, Evaluator, org.kie.api.runtime.rule.Evaluator

Direct Known Subclasses:

CoincidesEvaluatorDefinition.CoincidesEvaluator, DuringEvaluatorDefinition.DuringEvaluator, FinishedByEvaluatorDefinition.FinishedByEvaluator, FinishesEvaluatorDefinition.FinishesEvaluator, IncludesEvaluatorDefinition.IncludesEvaluator, MatchesEvaluatorsDefinition.StringMatchesEvaluator, MatchesEvaluatorsDefinition.StringNotMatchesEvaluator, MeetsEvaluatorDefinition.MeetsEvaluator, MetByEvaluatorDefinition.MetByEvaluator, OverlappedByEvaluatorDefinition.OverlappedByEvaluator, OverlapsEvaluatorDefinition.OverlapsEvaluator, PointInTimeEvaluator, SetEvaluatorsDefinition.ArrayContainsEvaluator, SetEvaluatorsDefinition.ArrayExcludesEvaluator, SetEvaluatorsDefinition.BaseMemberOfEvaluator, SetEvaluatorsDefinition.BaseNotMemberOfEvaluator, SetEvaluatorsDefinition.ObjectContainsEvaluator, SetEvaluatorsDefinition.ObjectExcludesEvaluator, SoundslikeEvaluatorsDefinition.StringNotSoundsLikeEvaluator, SoundslikeEvaluatorsDefinition.StringSoundsLikeEvaluator, StartedByEvaluatorDefinition.StartedByEvaluator, StartsEvaluatorDefinition.StartsEvaluator, StrEvaluatorDefinition.StrEvaluator

public abstract class BaseEvaluator
extends Object
implements Evaluator, Externalizable

BaseEvaluator is an Object Comparator that is operator aware

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
BaseEvaluator()
BaseEvaluator(ValueType type, Operator operator)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object object)
ValueType	getCoercedValueType()	Returns the value type this evaluator will coerce operands to, during evaluation.
Interval	getInterval()	In case this is a temporal evaluator, returns the interval in which this evaluator may match the target fact
Operator	getOperator()	Returns the operator representation object for this evaluator
ValueType	getValueType()	Returns the type of the values this evaluator operates upon.
int	hashCode()
boolean	isTemporal()	Returns true if this evaluator implements a temporal evaluation, i.e., a time sensitive evaluation whose properties of matching only events within an specific time interval can be used for determining event expirations automatically.
void	readExternal(ObjectInput in)
String	toString()
void	writeExternal(ObjectOutput out)

Methods inherited from class java.lang.Object

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

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

evaluate, evaluate, evaluateCachedLeft, evaluateCachedRight

Constructor Detail

BaseEvaluator

public BaseEvaluator()

BaseEvaluator

public BaseEvaluator(ValueType type,
                     Operator operator)

Method Detail

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

getOperator

public Operator getOperator()

Description copied from interface: Evaluator

Returns the operator representation object for this evaluator

Specified by:

getOperator in interface Evaluator

Specified by:

getOperator in interface org.kie.api.runtime.rule.Evaluator

getValueType

public ValueType getValueType()

Description copied from interface: Evaluator

Returns the type of the values this evaluator operates upon.

Specified by:

getValueType in interface Evaluator

Returns:

getCoercedValueType

public ValueType getCoercedValueType()

Description copied from interface: Evaluator

Returns the value type this evaluator will coerce operands to, during evaluation. This is useful for operators like "memberOf", that always convert to Object when evaluating, independently of the source operand value type.

Specified by:

getCoercedValueType in interface Evaluator

Returns:

isTemporal

public boolean isTemporal()

Description copied from interface: Evaluator

Returns true if this evaluator implements a temporal evaluation, i.e., a time sensitive evaluation whose properties of matching only events within an specific time interval can be used for determining event expirations automatically.

Specified by:

isTemporal in interface Evaluator

Specified by:

isTemporal in interface org.kie.api.runtime.rule.Evaluator

Returns:

true if the evaluator is a temporal evaluator.

getInterval

public Interval getInterval()

Description copied from interface: Evaluator

In case this is a temporal evaluator, returns the interval in which this evaluator may match the target fact

Specified by:

getInterval in interface Evaluator

Returns:

equals

public boolean equals(Object object)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object