[jira] [Closed] (JXR-170) NullPointerException while parsing Java 15 multi-line String source

["Slawomir Jaranowski (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JXR-170?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Slawomir Jaranowski closed JXR-170.
-----------------------------------
    Resolution: Fixed

> NullPointerException while parsing Java 15 multi-line String source
> -------------------------------------------------------------------
>
>                 Key: JXR-170
>                 URL: https://issues.apache.org/jira/browse/JXR-170
>             Project: Maven JXR
>          Issue Type: Bug
>          Components: maven2 jxr plugin
>    Affects Versions: 3.2.0
>            Reporter: Markus Spann
>            Assignee: Slawomir Jaranowski
>            Priority: Minor
>             Fix For: next-release
>
>
> I am encountering a {{NullPointerException}} in the aggregate goal while parsing a Java source that makes use of new Java 15 multi-line Strings containing a reserved Java keyword i.e. {{{}import{}}}.
> {noformat}
> Caused by: java.lang.NullPointerException: Cannot invoke "String.length()" because "name" is null
>     at org.apache.maven.jxr.pacman.JavaFileImpl.parseRecursive (JavaFileImpl.java:128)
>     at org.apache.maven.jxr.pacman.JavaFileImpl.parseRecursive (JavaFileImpl.java:144)
>     at org.apache.maven.jxr.pacman.JavaFileImpl.parse (JavaFileImpl.java:74)
>     at org.apache.maven.jxr.pacman.JavaFileImpl.<init> (JavaFileImpl.java:59)
> {noformat}
> Command-line: 
> {noformat}
> mvn org.apache.maven.plugins:maven-jxr-plugin:3.2.0:aggregate{noformat}
> Cause: variable name is null in line 128 of {{{}org.apache.maven.jxr.pacman.JavaFileImpl{}}}:
> {code:java}
>         if ( name.charAt( name.length() - 1 ) == '.' ){code}
> This is the cause of the run-time exception.
> The real cause however is more likely a parsing issue.
> The plugin stumbles at following statement in my project, a code generator (code abbreviated for clarity):
> {code:java}
>         Code code = new Code().addFormat("""
>             import {0};
>             import java.util.List;
>             """,
>             additionalImportClass.getName()
>             );
> {code}
> Same error can be observed in older versions of the plugin.
> The only work-around I found was to exclude this source from jxr in its Maven configuration:
> {code:java}
>         <pluginManagement>
>             <plugins>
>                 <plugin>
>                     <groupId>org.apache.maven.plugins</groupId>
>                     <artifactId>maven-jxr-plugin</artifactId>
>                     <configuration>
>                         <linkJavadoc>false</linkJavadoc>
>                         <skip>false</skip>
>                         <excludes>
>                             <exclude>**/ClassFailinginJxr.java</exclude>
>                         </excludes>
>                     </configuration>
>                 </plugin>
>             </plugins>
>         </pluginManagement>
> {code}
> The plugin should not encounter run-time exceptions and ignore content of multi-line strings.



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