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https://issues.apache.org/jira/browse/MCHECKSTYLE-442?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Osipov updated MCHECKSTYLE-442:
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Fix Version/s: waiting-for-feedback
> Not possible to specify useful ignoreStringsRegexp property for module name
> MultipleStringLiterals without error
> ----------------------------------------------------------------------------------------------------------------
>
> Key: MCHECKSTYLE-442
> URL: https://issues.apache.org/jira/browse/MCHECKSTYLE-442
> Project: Maven Checkstyle Plugin
> Issue Type: Bug
> Components: checkstyle:check
> Reporter: Nick Williams
> Priority: Major
> Fix For: waiting-for-feedback
>
>
> The [checkstyle
> documentation|https://checkstyle.sourceforge.io/checks/coding/multiplestringliterals.html]
> specifies this example for ignoring certain strings by regex in module
> {{MultipleStringLiterals}}.
> {code:xml}
> <module name="MultipleStringLiterals">
> <property name="ignoreStringsRegexp"
> value='^(("")|(", "))$'/>
> </module>
> {code}
> Not only does this example not work, but *no* useful value for this property
> works. Any regex that contains a double quote ("), which is required for this
> property to work, results in an error:
> {noformat}
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-checkstyle-plugin:3.3.0:check
> (checkstyle-verify-style) on project oss-parent:
> Failed during checkstyle execution:
> Failed during checkstyle configuration:
> unable to parse configuration stream - Element type "property" must be
> followed by either attribute specifications, ">" or "/>".:94:85 -> [Help 1]
> {noformat}
> In addition to trying their example verbatim, I have tried all of the
> following, all of which result in the same error. I cannot find a workaround,
> so I am unable to use this property.
> {code:xml}
> <property name="ignoreStringsRegexp"
> value='^""$' />
> <property name="ignoreStringsRegexp"
> value="^""$" />
> <property name="ignoreStringsRegexp"
> value='^""$' />
> <property name="ignoreStringsRegexp"
> value="^(("")|(", "))$" />
> <property name="ignoreStringsRegexp"
> value='^(("")|(", "))$' />
> <property name="ignoreStringsRegexp"
> value="^("")|(", ")$" />
> <property name="ignoreStringsRegexp"
> value='^("")|(", ")$' />
> {code}
> The parentheses and other symbols do not appear to be a problem, because the
> following do not result in any errors, they're just also not useful because
> checkstyle won't match on them:
> {code:xml}
> <property name="ignoreStringsRegexp"
> value='^$' />
> <property name="ignoreStringsRegexp"
> value='^()$' />
> {code}
> So it would seem that it's not possible to use legal XML techniques to insert
> double quotes into property values.
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