Package org.drools.mvel.evaluators

Class SetEvaluatorsDefinition.ObjectContainsEvaluator

java.lang.Object

org.drools.mvel.evaluators.BaseEvaluator

org.drools.mvel.evaluators.SetEvaluatorsDefinition.ObjectContainsEvaluator

All Implemented Interfaces:

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

Enclosing class:

SetEvaluatorsDefinition

public static class SetEvaluatorsDefinition.ObjectContainsEvaluator
extends BaseEvaluator

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static org.drools.core.rule.accessor.Evaluator	INSTANCE

Constructor Summary

Constructors

Constructor	Description
ObjectContainsEvaluator()

Method Summary

Modifier and Type	Method	Description
boolean	evaluate(org.drools.core.common.ReteEvaluator reteEvaluator, org.drools.core.rule.accessor.ReadAccessor extractor, org.drools.core.common.InternalFactHandle handle1, org.drools.core.rule.accessor.FieldValue fieldValue)
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.
String	toString()

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

equals, getCoercedValueType, getInterval, getOperator, getValueType, hashCode, isTemporal, readExternal, writeExternal

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final org.drools.core.rule.accessor.Evaluator INSTANCE

Constructor Detail

ObjectContainsEvaluator

public ObjectContainsEvaluator()

Method Detail

evaluate

public boolean evaluate(org.drools.core.common.ReteEvaluator reteEvaluator,
                        org.drools.core.rule.accessor.ReadAccessor extractor,
                        org.drools.core.common.InternalFactHandle handle1,
                        org.drools.core.rule.accessor.FieldValue fieldValue)

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