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List:       jakarta-commons-dev
Subject:    [jira] [Commented] (JEXL-243) Allow restricting available features in Script/Expressions
From:       "Dmitri Blinov (JIRA)" <jira () apache ! org>
Date:       2017-10-31 5:24:00
Message-ID: JIRA.13112633.1509118885000.108100.1509427440044 () Atlassian ! JIRA
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    [ https://issues.apache.org/jira/browse/JEXL-243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16226276#comment-16226276 \
] 

Dmitri Blinov commented on JEXL-243:
------------------------------------

Well, this is basically works, the only thing is what if I have in one framework two \
different types of scripts, say scripts with side effects and scripts without side \
effects (or better to name them getters and setters). Those types of scripts are \
supposed to use a single Jexl engine instance. It would be more practical to be able \
to specify desired features right to JexlEngine.createScript() method. Maybe \
JexlEngine.createExpression() should get such an overload too, but maybe it's even \
better, not to speak of backward compatibility now, to have the only one \
JexlEngine.createScript() which could create both "scripts" and "expressions" by \
simply specifying "right" feature sets in each case.

> Allow restricting available features in Script/Expressions
> ----------------------------------------------------------
> 
> Key: JEXL-243
> URL: https://issues.apache.org/jira/browse/JEXL-243
> Project: Commons JEXL
> Issue Type: Improvement
> Affects Versions: 3.1
> Reporter: Henri Biestro
> Assignee: Henri Biestro
> Fix For: 3.2
> 
> 
> Restrict features related to potential dangers/difficulties one may encounter \
> whilst scripting; Reserved Names: a set of reserved variable names that can not be \
>                 used as local variable (or parameter) names
> Registers: boolean property allowing parsing of register syntax (#number)
> Global Side Effect : boolean property controlling assigning/modifying values on \
> global variables Side Effect: boolean property controlling side effects \
> assigning/modifying values on any variable New Instance: boolean property \
>                 controlling creating new instances through new(...) or using class \
>                 as functor
> Loops: boolean property controlling usage of loop constructs (while(true), \
>                 for(...))
> Lambda: boolean property controlling usage of script function declarations
> 



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