[Closed] (MCHECKSTYLE-354) Plugin throws exception on encountering rule: SeparatorWrapDot of Google checkstyle

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[Closed] (MCHECKSTYLE-354) Plugin throws exception on encountering rule: SeparatorWrapDot of Google checkstyle

JIRA jira@apache.org

     [ https://issues.apache.org/jira/browse/MCHECKSTYLE-354?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Scholte closed MCHECKSTYLE-354.
--------------------------------------
    Resolution: Duplicate
      Assignee: Robert Scholte

> Plugin throws exception on encountering rule: SeparatorWrapDot of Google checkstyle
> -----------------------------------------------------------------------------------
>
>                 Key: MCHECKSTYLE-354
>                 URL: https://issues.apache.org/jira/browse/MCHECKSTYLE-354
>             Project: Maven Checkstyle Plugin
>          Issue Type: Bug
>          Components: predefined ruleset: Maven
>    Affects Versions: 3.0.0
>         Environment: Java 8
> Apache Maven 3.3.9
>            Reporter: Jawwad Farooq
>            Assignee: Robert Scholte
>            Priority: Major
>
> Version 3.0.0 of the plugin throws below exception if any voilation of rule '*SeparatorWrapDot*' is found in the code. I am using Google checks as the ruleset. 
>  
> {code:java}
> Execution validate of goal org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0:check fa
> iled: String index out of range: -1
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:213)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:154)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:146)
> at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
> at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
> at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
> at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
> at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:309)
> at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:194)
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:107)
> at org.apache.maven.cli.MavenCli.execute(MavenCli.java:993)
> at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:345)
> at org.apache.maven.cli.MavenCli.main(MavenCli.java:191)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
> at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
> at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
> Caused by: org.apache.maven.plugin.PluginExecutionException: Execution validate of goal org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0:check failed: String index out of range: -1
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:145)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
> ... 20 more
> Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
> at java.lang.String.substring(String.java:1967)
> at org.apache.maven.plugins.checkstyle.RuleUtil.getCategory(RuleUtil.java:95)
> at org.apache.maven.plugins.checkstyle.CheckstyleViolationCheckMojo.countViolations(CheckstyleViolationCheckMojo.java:646)
> at org.apache.maven.plugins.checkstyle.CheckstyleViolationCheckMojo.execute(CheckstyleViolationCheckMojo.java:564)
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
> ... 21 more
> {code}
>  
> Reason:
> Implementation of the function which is failing is below:
> Class: RuleUtil
> {code:java}
> public static String getCategory( String eventSrcName )
> {
>     if ( eventSrcName == null )
>     {
>         return null;
>     }
>     int end = eventSrcName.lastIndexOf( '.' );
>     eventSrcName = eventSrcName.substring( 0,  end );
>     if ( CHECKSTYLE_PACKAGE.equals( eventSrcName ) )
>     {
>         return "misc";
>     }
>     else if ( !eventSrcName.startsWith( CHECKSTYLE_PACKAGE ) )
>     {
>         return "extension";
>     }
>     return eventSrcName.substring( eventSrcName.lastIndexOf( '.' ) + 1 );
> }
> {code}
> The code 
> {code:java}
> eventSrcName = eventSrcName.substring( 0,  end );
> {code}
> The variable end is calculated using the statement:
> {code:java}
> int end = eventSrcName.lastIndexOf( '.' );
> {code}
> And for this rule, variable eventSrcName contains 'SeparatorWrapDot'. It DOES NOT contain eny dot in it. so end is -1 which results in:
>  {color:#FF0000}String index out of range: -1{color}



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