[GitHub] nifi issue #476: NIFI-1942 Processor to validate CSV against user-supplied s...

[JPercivall <gi...@git.apache.org>]

Github user JPercivall commented on the issue:

    https://github.com/apache/nifi/pull/476
  
    @pvillard31, I know what the problem with the end-line characters is. When going from the UI to Java, the characters are escaped so that what you input is transferred over to Java as is. So when you type the characters "\" and "\n" into the UI the Java string will end up being those two characters *not* the interpreted value "\n".
    
    There's been some discussion about it before and how we need to make some change but it hasn't been a top priority. For now what is done, is something like is done here[1]. Where the default value is escaped and then in the OnScheduled[2] or as a separate method[3] it is interpreted. 
    
    [1] https://github.com/apache/nifi/blob/1373bf672586ba5ddcfa697c45c832ccc79425cb/nifi-commons/nifi-processor-utilities/src/main/java/org/apache/nifi/processor/util/listen/AbstractListenEventBatchingProcessor.java#L61-L61
    [2] https://github.com/apache/nifi/blob/1373bf672586ba5ddcfa697c45c832ccc79425cb/nifi-commons/nifi-processor-utilities/src/main/java/org/apache/nifi/processor/util/listen/AbstractListenEventBatchingProcessor.java#L97-L97
    [3] https://github.com/apache/nifi/blob/cd846c8d627efb2606f72b6af009358dec27be63/nifi-commons/nifi-processor-utilities/src/main/java/org/apache/nifi/processor/util/put/AbstractPutEventProcessor.java#L566-L566


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