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https://issues.apache.org/jira/browse/NIFI-2020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15368789#comment-15368789
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ASF GitHub Bot commented on NIFI-2020:
--------------------------------------

Github user mattyb149 commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/564#discussion_r70157534
  
    --- Diff: 
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/JoltTransformJSON.java
 ---
    @@ -95,6 +99,24 @@
                 .required(false)
                 .build();
     
    +    public static final PropertyDescriptor CUSTOM_CLASS = new 
PropertyDescriptor.Builder()
    +            .name("jolt-custom-class")
    +            .displayName("Custom Transformation Class Name")
    +            .description("Fully Qualified Class Name for Custom 
Transformation  Module Directory should be specified")
    +            .required(false)
    +            .expressionLanguageSupported(false)
    --- End diff --
    
    Any reason why EL is not supported? I can't think of a great use case for 
using EL here, but unless there's a good reason not to, it adds to the 
flexibility of the system (and could eventually benefit from the Variable 
Registry right?)


> Enhance JoltTransformJSON processor to support custom transforms
> ----------------------------------------------------------------
>
>                 Key: NIFI-2020
>                 URL: https://issues.apache.org/jira/browse/NIFI-2020
>             Project: Apache NiFi
>          Issue Type: New Feature
>          Components: Core Framework
>    Affects Versions: 1.0.0
>            Reporter: Yolanda M. Davis
>            Assignee: Yolanda M. Davis
>             Fix For: 1.0.0
>
>
> Jolt supports additional custom transforms via fully-qualified Java 
> classnames. Would like to provide the ability to support custom 
> transformation (via drop in jars) for the Jolt Transform processor.



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