Package org.drools.compiler.rule.builder

Class EvaluatorWrapper

java.lang.Object

org.drools.compiler.rule.builder.EvaluatorWrapper

All Implemented Interfaces:

Serializable, Evaluator, Evaluator

public class EvaluatorWrapper
extends Object
implements Evaluator

An EvaluatorWrapper is used when executing MVEL expressions that have operator calls rewritten as: operator.evaluate( leftArg, rightArg )

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
EvaluatorWrapper(Evaluator evaluator, Declaration leftBinding, Declaration rightBinding)

Method Summary

Modifier and Type	Method	Description
boolean	evaluate(ValueResolver valueResolver, ReadAccessor extractor, FactHandle factHandle, FieldValue value)
boolean	evaluate(ValueResolver valueResolver, ReadAccessor leftExtractor, FactHandle left, ReadAccessor rightExtractor, FactHandle right)
boolean	evaluate(ReteEvaluator reteEvaluator, Object left, Object right)	This method is called when operators are rewritten as function calls.
String	getBindingName()
ValueType	getCoercedValueType()
static SelfReferenceClassFieldReader	getExtractor()
Interval	getInterval()
Operator	getOperator()
ValueType	getValueType()
boolean	isTemporal()
void	loadHandles(FactHandle[] handles, FactHandle rightHandle)
void	setBindingName(String bindingName)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

EvaluatorWrapper

public EvaluatorWrapper(Evaluator evaluator,
 Declaration leftBinding,
 Declaration rightBinding)

Method Details

evaluate

public boolean evaluate(ReteEvaluator reteEvaluator,
 Object left,
 Object right)

This method is called when operators are rewritten as function calls. For instance, x after y Is rewritten as after.evaluate( _workingMemory_, x, y )

Returns:

getValueType

public ValueType getValueType()

Specified by:

getValueType in interface Evaluator

Returns:

See Also:

• Evaluator.getValueType()

getOperator

public Operator getOperator()

Specified by:

getOperator in interface Evaluator

Specified by:

getOperator in interface Evaluator

Returns:

See Also:

• Evaluator.getOperator()

getCoercedValueType

public ValueType getCoercedValueType()

Specified by:

getCoercedValueType in interface Evaluator

Returns:

See Also:

• Evaluator.getCoercedValueType()

evaluate

public boolean evaluate(ValueResolver valueResolver,
 ReadAccessor extractor,
 FactHandle factHandle,
 FieldValue value)

Specified by:

evaluate in interface Evaluator

evaluate

public boolean evaluate(ValueResolver valueResolver,
 ReadAccessor leftExtractor,
 FactHandle left,
 ReadAccessor rightExtractor,
 FactHandle right)

Specified by:

evaluate in interface Evaluator

isTemporal

public boolean isTemporal()

Specified by:

isTemporal in interface Evaluator

Specified by:

isTemporal in interface Evaluator

Returns:

See Also:

• Evaluator.isTemporal()

getInterval

public Interval getInterval()

Specified by:

getInterval in interface Evaluator

Returns:

See Also:

• Evaluator.getInterval()

loadHandles

public void loadHandles(FactHandle[] handles,
 FactHandle rightHandle)

toString

public String toString()

Overrides:

toString in class Object

getExtractor

public static SelfReferenceClassFieldReader getExtractor()

getBindingName

public String getBindingName()

setBindingName

public void setBindingName(String bindingName)