com.singularsys.jep
Interface Evaluator

All Superinterfaces:

JepComponent, java.io.Serializable

All Known Implementing Classes:

PostfixEvaluator, RealEvaluator, StandardEvaluator

public interface Evaluator
extends JepComponent

Defines a method which can be used to evaluate a part of a node-tree. It is passed to classes which use CallbackEvaluatorI which need greater control over how they are evaluated.

Author:

Rich Morris Created on 22-Apr-2005

See Also:

CallbackEvaluationI

Method Summary

java.lang.Object	eval(Node node) Evaluates a sub expression.
java.lang.Object	evaluate(Node node) Evaluates a node and returns and object with the value of the node.

Methods inherited from interface com.singularsys.jep.JepComponent

getLightWeightInstance, init

Method Detail

evaluate

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

Evaluates a node and returns and object with the value of the node.

Throws:

ParseException - if errors occur during evaluation;

EvaluationException

eval

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

Evaluates a sub expression.

Throws:

ParseException - if errors occur during evaluation;

EvaluationException