[jira] [Commented] (LANG-867) StrSubstitutor: Ability to turn off substitution in values

["Henri Yandell (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LANG-867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13796537#comment-13796537 ] 

Henri Yandell commented on LANG-867:
------------------------------------

Seems fair to me. Patch needed.

> StrSubstitutor: Ability to turn off substitution in values
> ----------------------------------------------------------
>
>                 Key: LANG-867
>                 URL: https://issues.apache.org/jira/browse/LANG-867
>             Project: Commons Lang
>          Issue Type: Improvement
>          Components: lang.text.*
>            Reporter: Arend v. Reinersdorff
>            Priority: Minor
>              Labels: features
>             Fix For: Patch Needed
>
>
> In StrSubstitutor variable replacement works in a recursive way. And currently there's no way to turn this off.
> Why turn it off: I want to replace some variables in a simple template. Some of the replacemnt values are arbitrary user input.
> At the moment I escape all dollar signs in the replacement values with "$$". This is annoying. Especially as I use one template with variables as a value for another variable. Here I have to escape twice.
> Here's some example code. At the moment it prints "Hello world". The commented line is my suggestion for this feature. If it works, it should print "Hello ${key2}":
> Map<String, String> valueMap = new HashMap<>();
> valueMap.put("key", "$${key2}");
> valueMap.put("key2", "world");
> String source = "Hello ${key}";
> StrSubstitutor strSubstitutor = new StrSubstitutor(valueMap);
> // strSubstitutor.setEnableSubstitutionInValues(false);
> System.out.println(strSubstitutor.replace(source));



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