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https://issues.apache.org/jira/browse/NIFI-1923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16137384#comment-16137384
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ASF GitHub Bot commented on NIFI-1923:
--------------------------------------
Github user pvillard31 commented on a diff in the pull request:
https://github.com/apache/nifi/pull/2099#discussion_r134597430
--- Diff:
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/AttributesToJSON.java
---
@@ -79,6 +80,17 @@
.addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
.build();
+
+ public static final PropertyDescriptor ATTRIBUTES_REGEX = new
PropertyDescriptor.Builder()
+ .name("attributes-to-json-regex")
+ .displayName("Attributes Regular Expression")
+ .description("Regular expression that will be evaluated
against the flow file attributes to select "
+ + "the matching attributes. This property can be used
in combination with the attributes "
+ + "list property.")
+ .required(false)
+ .addValidator(StandardValidators.REGULAR_EXPRESSION_VALIDATOR)
--- End diff --
Agree to add EL evaluation against variable registry, system properties,
etc. But won't add the evaluation against the flow file as it will impact the
performances as you said.
> AttributesToJson should support regex of Attributes List
> --------------------------------------------------------
>
> Key: NIFI-1923
> URL: https://issues.apache.org/jira/browse/NIFI-1923
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Extensions
> Affects Versions: 0.6.1
> Reporter: Andrew Grande
> Assignee: Pierre Villard
>
> Today, the Attributes List supports _only_ a comma-separated list of
> attributes to include in the output JSON. This is not flexible enough, the
> alternative is to strip every other attribute and 'convert all', which
> requires more work and may not be possible if some need to be preserved.
> *Proposal:* Attributes List must be a regex which matches the attributes to
> be included in the resulting JSON. E.g. I have lined up my data to include
> attributes like below:
> {code}
> {
> "delimited.header.column.2" : "Assignment",
> "delimited.header.column.3" : "Organization Name",
> "delimited.header.column.1" : "Registry",
> "delimited.header.column.4" : "Organization Address"
> }
> {code}
> The challenge is I have to list *delimited.header.column.1*..N explicitly,
> every property name. I may not even know how many there will be for a more
> dynamic flow.
> As a user I should be able to say *delimited.header.column\.** or any
> arbitrarily complex regex for a more dynamic conversion.
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