test a boolean expression in string format [duplicate]

Question

I want to develop a class/method that takes as input a string of this format: "((true | false) & (!false & false))", and returns true or false, accordingly (in this case false).

How should I proceed?

So you want to take a boolean expression in the form of a string and parse it? — Arc676
– Arc676, Commented Nov 2, 2015 at 13:53
Note that this is bitwise boolean evaluation. Boolean AND and OR are represented by && and || respectively. — Mena
– Mena, Commented Nov 2, 2015 at 13:57
You're totally right, but in this case, I am interested in a regular AND/OR evaluation. But, yes to be correct I have to change the symbols. — Endrit Sino
– Endrit Sino, Commented Nov 2, 2015 at 14:19

Community · Accepted Answer · 2017-05-23 11:58:36Z

3

if performance is not the issue AND you're really sure that the boolean expression is safe (security reasons), you can launch a full-blown JavaScript engine and evaluate the expression

like described in the following question.

edited May 23, 2017 at 11:58

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answered Nov 2, 2015 at 13:54

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2 Comments

Husam Over a year ago

And Here another good example

Endrit Sino Over a year ago

Thank you Funtik! Actually I guess the performance will be an issue, for me. Adding just a small note, that might complicate a bit the problem, is that I am going to implement this in Salesforce(I don't know if you're familiar with), that uses Apex as the propietary language. Apex, is a Java-like language, and I thought that I could get a solution adaptable to Apex, but I appreciate your answer, so thank you. :)

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