[jira] [Resolved] (VELOCITY-919) Velocity is removing the Zero-Width space from the text

["Claude Brisson (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/VELOCITY-919?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Claude Brisson resolved VELOCITY-919.
-------------------------------------
    Fix Version/s: 2.2
         Assignee: Claude Brisson
       Resolution: Fixed

Fixed by commit 1866291, with corresponding test case.


> Velocity is removing the Zero-Width space from the text
> -------------------------------------------------------
>
>                 Key: VELOCITY-919
>                 URL: https://issues.apache.org/jira/browse/VELOCITY-919
>             Project: Velocity
>          Issue Type: Bug
>          Components: Engine
>    Affects Versions: 2.1
>            Reporter: Rob van Dalen
>            Assignee: Claude Brisson
>            Priority: Major
>             Fix For: 2.2
>
>         Attachments: TestVelocity.zip
>
>
> I am not sure if this is a bug but we have the following situation.
> We have a recognition application of recognizing text and decorating the text.
> When we putting the below input text to the application:
>  *Input for the application:*
> {code:none}
> see ​art. 1​ of the WW and then some other text
> {code}
> _Just before the text *art. 1* there is a Zero-Width space._
> The application will make the text like this:
>  *Input for the VelocityEngine:*
> {code:none}
> see ​${decorations[0]} and then some other text
> {code}
> _Just before the text *$\{decorations[0]}* there still is a Zero-Width space. because our application only changed *art.1 of the WW* into *$\{decorations[0]}*_
> When we put this text to the VelocityEngine together with the decoration template and a list of laws in the context, the engine is changing my text. It's removing the Zero-Width Space.
>  Just before the VelocityEngine is using the text and the template, VelocityEngine is removing the Zer0-Width Space
> Velocity should only do some markup and not change the original input text.
> *decoration.vm:*
> {code:none}
> #set($decorations = [])
> #foreach($type in $annotationsMap.keySet())
>     #foreach($citation in $annotationsMap.get($type))
>         #set($hideAddResult = $decorations.add("##
> <verwijzing>$citation</verwijzing>##
> "))
>     #end
> #end
> {code}
> This is a pace of Java code:
> {code:java}
> Path templateFile = TEMPLATE_FILE.toPath();
> VelocityEngine velocityEngine = new VelocityEngine();
> Path pathName = templateFile.getParent();
> velocityEngine.setProperty(FILE_RESOURCE_LOADER_PATH, pathName.toFile().getAbsolutePath());
> velocityEngine.init();
> Map<String, List<String>> annotationsMap = getAnnotationsMap();
> StringBuilder templateStringBuilder = new StringBuilder("see \u200B${decorations[0]} and then some other text");
> templateStringBuilder.insert(0, "#parse(\"" + templateFile.getFileName() + "\")");
> VelocityContext context = new VelocityContext();
> context.put("escape", new EscapeTool());
> // annotationsMap is put in context as a whole, so that template script can decide what to do with different CitationTypes
> context.put("annotationsMap", annotationsMap);
> StringWriter writer = new StringWriter();
> velocityEngine.evaluate(context, writer, templateFile.getFileName().toString(), templateStringBuilder.toString());
> {code}
> The output of this application is:
> {code:html}
> see <verwijzing>art. 1​ of the WW</verwijzing> and then some other text
> {code}
> But just before *<verwijzing>* i expected the Zero-Width Space, but it's gone. So somewhere in the methode evaluate of the VelocityEngine this character is removed, because it's still present in the template text *"see ​$\{decorations[0]} and then some other text"*
> Please help. 



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