Package com.singularsys.jep

Interface Evaluator

All Superinterfaces:
JepComponent, Serializable
All Known Implementing Classes:
FastEvaluator, FastEvaluator3_4, FastEvaluator3_5, PostfixEvaluator, RealEvaluator, StackCheckingFastEvaluator, StandardEvaluator, ThreadSafeEvaluator, UncheckedEvaluator
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 that use CallbackEvaluatorI which need greater control over how they are evaluated.
Author:
Rich Morris Created on 22-Apr-2005
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    Object
    eval(Node node)
    Evaluates a sub expression.
    Object
    evaluate(Node node)
    Main entry point, evaluates a node and returns and object with the value of the node.

    Methods inherited from interface com.singularsys.jep.JepComponent

    getLightWeightInstance, init

  • Method Details

    • evaluate

      Object evaluate(Node node) throws EvaluationException
      Main entry point, evaluates a node and returns and object with the value of the node.
      Parameters:
      node - node to evaluate
      Returns:
      value after evaluation
      Throws:
      EvaluationException - if errors occur during evaluation;

    • eval

      Object eval(Node node) throws EvaluationException
      Evaluates a sub expression. This method can be called by PostfixMathCommands which implement CallbackEvaluationI
      Parameters:
      node - node to evaluate
      Returns:
      The value after evaluating the sub expression.
      Throws:
      EvaluationException - if errors occur during evaluation;