Package com.singularsys.extensions.fastreal

Class RpEvaluator

java.lang.Object

com.singularsys.extensions.fastreal.RpEvaluator

All Implemented Interfaces:

Evaluator, JepComponent, java.io.Serializable

public class RpEvaluator
extends java.lang.Object
implements Evaluator

An evaluator using the RpEval system. Note that using this evaluator is slower than using the RpEval class directly.

Author:

Richard Morris

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
RpEvaluator(boolean updateJepVariables)	Constructor

Method Summary

Modifier and Type	Method	Description
java.lang.Object	eval(Node node)	Evaluates a sub expression.
java.lang.Object	evaluate(Node node)	Main entry point, evaluates a node and returns and object with the value of the node.
JepComponent	getLightWeightInstance()	Gets a light-weight instance suitable for using in multiple threads.
AbstractEval	getRpe()
void	init(Jep jep)	Initialize the component.
void	updateJepVariables()

Methods inherited from class java.lang.Object

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

Constructor Detail

RpEvaluator

public RpEvaluator(boolean updateJepVariables)

Constructor

Parameters:

updateJepVariables - whether to update jep variable after each call to evaluate

Method Detail

eval

public java.lang.Object eval(Node node)
                      throws EvaluationException

Description copied from interface: Evaluator

Evaluates a sub expression. This method can be called by PostfixMathCommands which implement CallbackEvaluationI

Specified by:

eval in interface Evaluator

Parameters:

node - node to evaluate

Returns:

The value after evaluating the sub expression.

Throws:

EvaluationException - if errors occur during evaluation;

evaluate

public java.lang.Object evaluate(Node node)
                          throws EvaluationException

Description copied from interface: Evaluator

Main entry point, evaluates a node and returns and object with the value of the node.

Specified by:

evaluate in interface Evaluator

Parameters:

node - node to evaluate

Returns:

value after evaluation

Throws:

EvaluationException - if errors occur during evaluation;

getLightWeightInstance

public JepComponent getLightWeightInstance()

Description copied from interface: JepComponent

Gets a light-weight instance suitable for using in multiple threads.

Specified by:

getLightWeightInstance in interface JepComponent

Returns:

either an new instance, null or 'this'.

init

public void init(Jep jep)

Description copied from interface: JepComponent

Initialize the component. This methods is called whenever a component is added to Jep. Hence it allows components to keep track of the other components they may rely on.

Specified by:

init in interface JepComponent

Parameters:

jep - the current Jep instance

getRpe

public AbstractEval getRpe()

updateJepVariables

public void updateJepVariables()