Package org.drools.mvel.evaluators

Class OverlappedByEvaluatorDefinition

java.lang.Object

org.drools.mvel.evaluators.OverlappedByEvaluatorDefinition

All Implemented Interfaces:

Externalizable, Serializable, org.drools.compiler.rule.builder.EvaluatorDefinition, org.kie.api.runtime.rule.EvaluatorDefinition

public class OverlappedByEvaluatorDefinition
extends Object
implements org.drools.compiler.rule.builder.EvaluatorDefinition

The implementation of the overlappedby evaluator definition.

The overlappedby evaluator correlates two events and matches when the correlated event starts before the current event starts and finishes after the current event starts, but before the current event finishes. In other words, both events have an overlapping period.

Lets look at an example:

$eventA : EventA( this overlappedby $eventB )

The previous pattern will match if and only if:

 $eventB.startTimestamp < $eventA.startTimestamp < $eventB.endTimestamp < $eventA.endTimestamp 

The overlappedby operator accepts 1 or 2 optional parameters as follow:

• If one parameter is defined, this will be the maximum distance between the start timestamp of the current event and the end timestamp of the correlated event. Example:

$eventA : EventA( this overlappedby[ 5s ] $eventB )

Will match if and only if:

 
 $eventB.startTimestamp < $eventA.startTimestamp < $eventB.endTimestamp < $eventA.endTimestamp &&
 0 <= $eventB.endTimestamp - $eventA.startTimestamp <= 5s 
 

• If two values are defined, the first value will be the minimum distance and the second value will be the maximum distance between the start timestamp of the current event and the end timestamp of the correlated event. Example:

$eventA : EventA( this overlappedby[ 5s, 10s ] $eventB )

Will match if and only if:

 
 $eventB.startTimestamp < $eventA.startTimestamp < $eventB.endTimestamp < $eventA.endTimestamp &&
 5s <= $eventB.endTimestamp - $eventA.startTimestamp <= 10s 
 

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	OverlappedByEvaluatorDefinition.OverlappedByEvaluator	Implements the 'overlappedby' evaluator itself

Nested classes/interfaces inherited from interface org.drools.compiler.rule.builder.EvaluatorDefinition

org.drools.compiler.rule.builder.EvaluatorDefinition.Target

Field Summary

Fields

Modifier and Type	Field	Description
static org.drools.drl.parser.impl.Operator	NOT_OVERLAPPED_BY
static org.drools.drl.parser.impl.Operator	OVERLAPPED_BY
static String	overlappedbyOp

Constructor Summary

Constructors

Constructor	Description
OverlappedByEvaluatorDefinition()

Method Summary

Modifier and Type	Method	Description
org.drools.core.rule.accessor.Evaluator	getEvaluator(org.drools.core.base.ValueType type, String operatorId, boolean isNegated, String parameterText)
org.drools.core.rule.accessor.Evaluator	getEvaluator(org.drools.core.base.ValueType type, String operatorId, boolean isNegated, String parameterText, org.drools.compiler.rule.builder.EvaluatorDefinition.Target left, org.drools.compiler.rule.builder.EvaluatorDefinition.Target right)
org.drools.core.rule.accessor.Evaluator	getEvaluator(org.drools.core.base.ValueType type, org.drools.drl.parser.impl.Operator operator)
org.drools.core.rule.accessor.Evaluator	getEvaluator(org.drools.core.base.ValueType type, org.drools.drl.parser.impl.Operator operator, String parameterText)
String[]	getEvaluatorIds()
org.drools.compiler.rule.builder.EvaluatorDefinition.Target	getTarget()
boolean	isNegatable()
void	readExternal(ObjectInput in)
boolean	supportsType(org.drools.core.base.ValueType type)
void	writeExternal(ObjectOutput out)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

overlappedbyOp

public static final String overlappedbyOp

OVERLAPPED_BY

public static final org.drools.drl.parser.impl.Operator OVERLAPPED_BY

NOT_OVERLAPPED_BY

public static final org.drools.drl.parser.impl.Operator NOT_OVERLAPPED_BY

Constructor Detail

OverlappedByEvaluatorDefinition

public OverlappedByEvaluatorDefinition()

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

getEvaluator

public org.drools.core.rule.accessor.Evaluator getEvaluator(org.drools.core.base.ValueType type,
                                                            org.drools.drl.parser.impl.Operator operator)

Specified by:

getEvaluator in interface org.drools.compiler.rule.builder.EvaluatorDefinition

getEvaluator

public org.drools.core.rule.accessor.Evaluator getEvaluator(org.drools.core.base.ValueType type,
                                                            org.drools.drl.parser.impl.Operator operator,
                                                            String parameterText)

Specified by:

getEvaluator in interface org.drools.compiler.rule.builder.EvaluatorDefinition

getEvaluator

public org.drools.core.rule.accessor.Evaluator getEvaluator(org.drools.core.base.ValueType type,
                                                            String operatorId,
                                                            boolean isNegated,
                                                            String parameterText)

Specified by:

getEvaluator in interface org.drools.compiler.rule.builder.EvaluatorDefinition

getEvaluator

public org.drools.core.rule.accessor.Evaluator getEvaluator(org.drools.core.base.ValueType type,
                                                            String operatorId,
                                                            boolean isNegated,
                                                            String parameterText,
                                                            org.drools.compiler.rule.builder.EvaluatorDefinition.Target left,
                                                            org.drools.compiler.rule.builder.EvaluatorDefinition.Target right)

Specified by:

getEvaluator in interface org.drools.compiler.rule.builder.EvaluatorDefinition

getEvaluatorIds

public String[] getEvaluatorIds()

Specified by:

getEvaluatorIds in interface org.drools.compiler.rule.builder.EvaluatorDefinition

isNegatable

public boolean isNegatable()

Specified by:

isNegatable in interface org.drools.compiler.rule.builder.EvaluatorDefinition

getTarget

public org.drools.compiler.rule.builder.EvaluatorDefinition.Target getTarget()

Specified by:

getTarget in interface org.drools.compiler.rule.builder.EvaluatorDefinition

supportsType

public boolean supportsType(org.drools.core.base.ValueType type)

Specified by:

supportsType in interface org.drools.compiler.rule.builder.EvaluatorDefinition