ru.histone.v2.evaluator

Class EvaluatorHelper

java.lang.Object

ru.histone.v2.evaluator.EvaluatorHelper

public class EvaluatorHelper
extends Object

Contains common methods for Evaluator and StdLibrary

Since:

23-06-2017

Author:

Alexey Nevinsky

Field Summary

Fields

Modifier and Type	Field and Description
protected Converter	converter

Constructor Summary

Constructors

Constructor and Description
EvaluatorHelper(Converter converter) Creates helper

Method Summary

Modifier and Type	Method and Description
Optional<Double>	getValue(EvalNode node) Return double value from specified node
CompletableFuture<EvalNode>	processAddNodes(Context context, List<EvalNode> lr) Processes summary operation of 2 nodes, e.g.
protected CompletableFuture<EvalNode>	processAddNumberNodes(EvalNode left, EvalNode right)
EvalNode	processUnaryMinus(EvalNode n) Processes node with unary minus, e.g.

Methods inherited from class java.lang.Object

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

Field Detail

converter

protected final Converter converter

Constructor Detail

EvaluatorHelper

public EvaluatorHelper(Converter converter)

Creates helper

Parameters:

converter - for convert java value to EvalNode

Method Detail

processUnaryMinus

public EvalNode processUnaryMinus(EvalNode n)

Processes node with unary minus, e.g. {{!a && b}}

Parameters:

n - for processing

Returns:

result of operation

processAddNodes

public CompletableFuture<EvalNode> processAddNodes(Context context,
                                                   List<EvalNode> lr)

Processes summary operation of 2 nodes, e.g. {{"a" + "b"}}

Parameters:

context - evaluation context of current template

lr - left and right nodes of opertaion

Returns:

operation result

processAddNumberNodes

protected CompletableFuture<EvalNode> processAddNumberNodes(EvalNode left,
                                                            EvalNode right)

getValue

public Optional<Double> getValue(EvalNode node)

Return double value from specified node

Parameters:

node - with value

Returns:

double result