Package org.drools.mvel.evaluators

Class DuringEvaluatorDefinition.DuringEvaluator

java.lang.Object

org.drools.mvel.evaluators.BaseEvaluator

org.drools.mvel.evaluators.DuringEvaluatorDefinition.DuringEvaluator

All Implemented Interfaces:

Externalizable, Serializable, org.drools.core.rule.accessor.Evaluator, MvelEvaluator, org.kie.api.runtime.rule.Evaluator

Enclosing class:

DuringEvaluatorDefinition

public static class DuringEvaluatorDefinition.DuringEvaluator
extends BaseEvaluator

Implements the 'during' evaluator itself

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
DuringEvaluator()
DuringEvaluator(org.drools.core.base.ValueType type, boolean isNegated, long[] parameters, String paramText)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
boolean	evaluate(org.drools.core.common.ReteEvaluator reteEvaluator, org.drools.core.rule.accessor.ReadAccessor extractor, org.drools.core.common.InternalFactHandle object1, org.drools.core.rule.accessor.FieldValue object2)
boolean	evaluate(org.drools.core.common.ReteEvaluator reteEvaluator, org.drools.core.rule.accessor.ReadAccessor extractor1, org.drools.core.common.InternalFactHandle handle1, org.drools.core.rule.accessor.ReadAccessor extractor2, org.drools.core.common.InternalFactHandle handle2)
boolean	evaluateCachedLeft(org.drools.core.common.ReteEvaluator reteEvaluator, VariableRestriction.VariableContextEntry context, org.drools.core.common.InternalFactHandle right)	Evaluates the expression using the provided parameters.
boolean	evaluateCachedRight(org.drools.core.common.ReteEvaluator reteEvaluator, VariableRestriction.VariableContextEntry context, org.drools.core.common.InternalFactHandle left)	Evaluates the expression using the provided parameters.
org.drools.core.time.Interval	getInterval()
int	hashCode()
boolean	isTemporal()
void	readExternal(ObjectInput in)
String	toString()
void	writeExternal(ObjectOutput out)

Methods inherited from class org.drools.mvel.evaluators.BaseEvaluator

getCoercedValueType, getOperator, getValueType

Methods inherited from class java.lang.Object

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

Constructor Detail

DuringEvaluator

public DuringEvaluator()

DuringEvaluator

public DuringEvaluator(org.drools.core.base.ValueType type,
                       boolean isNegated,
                       long[] parameters,
                       String paramText)

Method Detail

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class BaseEvaluator

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class BaseEvaluator

Throws:

IOException

isTemporal

public boolean isTemporal()

Specified by:

isTemporal in interface org.drools.core.rule.accessor.Evaluator

Specified by:

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

Overrides:

isTemporal in class BaseEvaluator

getInterval

public org.drools.core.time.Interval getInterval()

Specified by:

getInterval in interface org.drools.core.rule.accessor.Evaluator

Overrides:

getInterval in class BaseEvaluator

evaluate

public boolean evaluate(org.drools.core.common.ReteEvaluator reteEvaluator,
                        org.drools.core.rule.accessor.ReadAccessor extractor,
                        org.drools.core.common.InternalFactHandle object1,
                        org.drools.core.rule.accessor.FieldValue object2)

evaluateCachedRight

public boolean evaluateCachedRight(org.drools.core.common.ReteEvaluator reteEvaluator,
                                   VariableRestriction.VariableContextEntry context,
                                   org.drools.core.common.InternalFactHandle left)

Description copied from interface: MvelEvaluator

Evaluates the expression using the provided parameters. This method is used when evaluating right-activated beta-constraints, i.e., a fact attribute against a variable value, that is activated from the right. For instance: Person( name == $someName ) This method will be used when a new Person instance is evaluated. So it will cache the value of the "Person" instance and will iterate over the left memory comparing it to each "$someName" bound values.

Parameters:

reteEvaluator - The current working memory

context - The previously cached context, including the right value and the extractor for the left value.

left - The left object, from where to extract the bound variable. In the above example, that is the "$someName" variable value.

Returns:

Returns true if evaluation is successful. false otherwise.

evaluateCachedLeft

public boolean evaluateCachedLeft(org.drools.core.common.ReteEvaluator reteEvaluator,
                                  VariableRestriction.VariableContextEntry context,
                                  org.drools.core.common.InternalFactHandle right)

Description copied from interface: MvelEvaluator

Evaluates the expression using the provided parameters. This method is used when evaluating left-activated beta-constraints, i.e., a fact attribute against a variable value, that is activated from the left. For instance: Person( name == $someName ) This method will be used when a new $someName variable is bound. So it will cache the value of $someName and will iterate over the right memory (Person instances) evaluating each occurrence.

Parameters:

reteEvaluator - The current working memory

context - The previously cached context, including the left value and the extractor for the right value.

right - The right object, from where to extract the value. In the above example, that is the "Person" instance from where to extract the "name" attribute.

Returns:

Returns true if evaluation is successful. false otherwise.

evaluate

public boolean evaluate(org.drools.core.common.ReteEvaluator reteEvaluator,
                        org.drools.core.rule.accessor.ReadAccessor extractor1,
                        org.drools.core.common.InternalFactHandle handle1,
                        org.drools.core.rule.accessor.ReadAccessor extractor2,
                        org.drools.core.common.InternalFactHandle handle2)

toString

public String toString()

Overrides:

toString in class BaseEvaluator

hashCode

public int hashCode()

Overrides:

hashCode in class BaseEvaluator

equals

public boolean equals(Object obj)

Overrides:

equals in class BaseEvaluator