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https://issues.apache.org/jira/browse/NIFI-1919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15311380#comment-15311380
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ASF subversion and git services commented on NIFI-1919:
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Commit 812731497553404161eb51100ba34f5121fffad9 in nifi's branch
refs/heads/master from [~alopresto]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=8127314 ]
NIFI-1919 Added replaceFirst() expression language method which accepts literal
or pattern for replacement.
Reverted whitespace changes. (+8 squashed commits)
Squashed commits:
[329755c] NIFI-1919 Reverted import re-organization from IDE.
[cf73c2f] NIFI-1919 Updated expression language guide.
[d9a1455] NIFI-1919 Reverted changes to ReplaceEvaluator.
Added ReplaceFirstEvaluator.
Added replace first logic to Query buildFunctionEvaluator.
Added unit tests.
[e2eb880] NIFI-1919 Added replaceFirst to AttributeExpression lexer and parser
grammar definitions.
[11fe913] NIFI-1919 Ignored demonstrative test for replaceAll as it behaves as
expected.
[af97be1] NIFI-1919 Changed ReplaceEvaluator to use String#replaceFirst which
interprets regex instead of compiling as literal.
Demonstrative unit test now passes but two existing unit tests fail. I am not
sure these tests are correct.
[f24f17b] NIFI-1919 Added working unit test to illustrate fix.
[8a0d43b] NIFI-1919 Added Groovy unit test to demonstrate issue.
Added DelegatingMetaClass code to record it (test not complete).
This closes #474.
Signed-off-by: Andy LoPresto <[email protected]>
> Expression Language only evaluates regular expression replacement on
> replaceAll, not replace
> --------------------------------------------------------------------------------------------
>
> Key: NIFI-1919
> URL: https://issues.apache.org/jira/browse/NIFI-1919
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 0.6.1
> Reporter: Andy LoPresto
> Assignee: Andy LoPresto
> Fix For: 1.0.0, 0.7.0
>
>
> When {{${attribute:replaceAll('\w+', 'replacement')}}} is called, the pattern
> is matched and applied. However, when {{${attribute:replace('\w+',
> 'replacement')}}} is called, it is not. I believe this is because
> {{ReplaceAllEvaluator}} uses {{String#replaceAll(String regex, String
> replacement)}} while {{ReplaceEvaluator}} uses {{String#replace(CharSequence
> target, CharSequence replacement)}} which then uses
> {{Pattern.compile(target.toString(), Pattern.LITERAL)}} instead of compiling
> for a regular expression. I am writing a unit test to demonstrate this and
> show the results when {{String#replaceFirst()}} is used instead.
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