Package dk.jonaslindstrom.arithmeticparser

Class Evaluator<NumberT>

java.lang.Object

dk.jonaslindstrom.arithmeticparser.Evaluator<NumberT>

Type Parameters:

NumberT -

public class Evaluator<NumberT>
extends Object

This class can evaluate expressions parsed to reverse polish notation using the Parser class.

Constructor Summary

Constructors

Constructor	Description
Evaluator(Map<String,MultiOperator<NumberT>> functions, Map<String,java.util.function.BinaryOperator<NumberT>> operators, NumberParser<NumberT> parser)

Method Summary

Modifier and Type	Method	Description
static Double	evaluate(String expression)
static Double	evaluate(String expression, Map<String,Double> variables, Map<String,MultiOperator<Double>> functions)
NumberT	evaluate(List<Token> expression, Map<String,NumberT> variables)	Given an expression as a list of tokens in RPN (reverse Polish Notation), this evaluator computes the result.
static Evaluator<Double>	getDefault()
static Evaluator<Double>	getDefault(Map<String,MultiOperator<Double>> functions)
static <E> Evaluator<E>	getField(Field<E> field, java.util.function.Function<String,E> parser, Map<String,MultiOperator<E>> functions)
static <E> Evaluator<E>	getRing(Ring<E> field, java.util.function.Function<String,E> parser, Map<String,MultiOperator<E>> functions)

Methods inherited from class java.lang.Object

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

Constructor Details

Evaluator

public Evaluator(Map<String,MultiOperator<NumberT>> functions,
 Map<String,java.util.function.BinaryOperator<NumberT>> operators,
 NumberParser<NumberT> parser)

Method Details

getDefault

public static Evaluator<Double> getDefault()

getDefault

public static Evaluator<Double> getDefault(Map<String,MultiOperator<Double>> functions)

getField

public static <E> Evaluator<E> getField(Field<E> field,
 java.util.function.Function<String,E> parser,
 Map<String,MultiOperator<E>> functions)

getRing

public static <E> Evaluator<E> getRing(Ring<E> field,
 java.util.function.Function<String,E> parser,
 Map<String,MultiOperator<E>> functions)

evaluate

public static Double evaluate(String expression,
 Map<String,Double> variables,
 Map<String,MultiOperator<Double>> functions)

evaluate

public static Double evaluate(String expression)

evaluate

public NumberT evaluate(List<Token> expression,
 Map<String,NumberT> variables)
                 throws EvaluationException

Given an expression as a list of tokens in RPN (reverse Polish Notation), this evaluator computes the result.

Parameters:

expression -

Returns:

Throws:

EvaluationException