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https://issues.apache.org/jira/browse/CXF-3759?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Sergey Beryozkin resolved CXF-3759.
-----------------------------------

       Resolution: Fixed
    Fix Version/s: 2.5
                   2.4.3
         Assignee: Sergey Beryozkin

> wadl2java fails with NullPointerException if status codes of multiple 
> response elements are not in ascending numerical order
> ----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CXF-3759
>                 URL: https://issues.apache.org/jira/browse/CXF-3759
>             Project: CXF
>          Issue Type: Bug
>    Affects Versions: 2.4.2
>            Reporter: Oliver Jelinski
>            Assignee: Sergey Beryozkin
>            Priority: Minor
>             Fix For: 2.4.3, 2.5
>
>
> Strangely, if I have the status codes in the response not in ascending order 
> in the wadl-document, wadl2java fails with NPE.
> For example the following works correctly:
> <?xml version="1.0" encoding="UTF-8"?>
> <application 
>   xmlns="http://wadl.dev.java.net/2009/02";
>   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
>   xsi:schemaLocation="http://wadl.dev.java.net/2009/02 wadl.xsd" >
>   <resources base="http://localhost:9900/MyService";>
>     <resource path="/MyResource" id="my.Resource">
>         <method name="GET" id="putSomething">
>           <request />
>           <response status="200" />
>           <response status="400" />
>         </method>
>     </resource>
>   </resources>
> </application>
> ... while the following doesn't:
> <?xml version="1.0" encoding="UTF-8"?>
> <application 
>   xmlns="http://wadl.dev.java.net/2009/02";
>   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
>   xsi:schemaLocation="http://wadl.dev.java.net/2009/02 wadl.xsd" >
>   <resources base="http://localhost:9900/MyService";>
>     <resource path="/MyResource" id="my.Resource">
>         <method name="GET" id="putSomething">
>           <request />
>           <response status="400" />
>           <response status="200" />
>         </method>
>     </resource>
>   </resources>
> </application>
> ... but throws the following exception:
> [ERROR] Failed to execute goal 
> org.apache.cxf:cxf-wadl2java-plugin:2.4.2:wadl2java (generate-sources) on 
> project XXX: java.lang.NullPointerException -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute 
> goal org.apache.cxf:cxf-wadl2java-plugin:2.4.2:wadl2java (generate-sources) 
> on project XXX: java.lang.NullPointerException
>       at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)
>       at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
>       at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
>       at 
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
>       at 
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
>       at 
> org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
>       at 
> org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
>       at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
>       at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
>       at org.apache.maven.cli.MavenCli.execute(MavenCli.java:534)
>       at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
>       at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>       at java.lang.reflect.Method.invoke(Method.java:597)
>       at 
> org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
>       at 
> org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
>       at 
> org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
>       at 
> org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
> Caused by: org.apache.maven.plugin.MojoExecutionException: 
> java.lang.NullPointerException
>       at 
> org.apache.cxf.maven_plugin.wadlto.AbstractCodeGeneratorMojo.callCodeGenerator(AbstractCodeGeneratorMojo.java:458)
>       at 
> org.apache.cxf.maven_plugin.wadlto.WADL2JavaMojo.execute(WADL2JavaMojo.java:101)
>       at 
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:107)
>       at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
>       ... 19 more
> Caused by: org.apache.cxf.tools.common.ToolException: 
> java.lang.NullPointerException
>       at 
> org.apache.cxf.tools.wadlto.jaxrs.JAXRSContainer.execute(JAXRSContainer.java:75)
>       at 
> org.apache.cxf.tools.common.toolspec.ToolRunner.runTool(ToolRunner.java:103)
>       at org.apache.cxf.tools.wadlto.WADLToJava.run(WADLToJava.java:65)
>       at org.apache.cxf.tools.wadlto.WADLToJava.run(WADLToJava.java:57)
>       at 
> org.apache.cxf.maven_plugin.wadlto.AbstractCodeGeneratorMojo.callCodeGenerator(AbstractCodeGeneratorMojo.java:455)
>       ... 22 more
> Caused by: java.lang.NullPointerException
>       at 
> org.apache.cxf.helpers.DOMUtils.getChildrenWithName(DOMUtils.java:341)
>       at 
> org.apache.cxf.jaxrs.ext.codegen.SourceGenerator.writeResponseType(SourceGenerator.java:598)
>       at 
> org.apache.cxf.jaxrs.ext.codegen.SourceGenerator.writeResourceMethod(SourceGenerator.java:505)
>       at 
> org.apache.cxf.jaxrs.ext.codegen.SourceGenerator.writeMethods(SourceGenerator.java:416)
>       at 
> org.apache.cxf.jaxrs.ext.codegen.SourceGenerator.writeResourceClass(SourceGenerator.java:331)
>       at 
> org.apache.cxf.jaxrs.ext.codegen.SourceGenerator.generateResourceClasses(SourceGenerator.java:208)
>       at 
> org.apache.cxf.jaxrs.ext.codegen.SourceGenerator.generateSource(SourceGenerator.java:173)
>       at 
> org.apache.cxf.tools.wadlto.jaxrs.JAXRSContainer.processWadl(JAXRSContainer.java:128)
>       at 
> org.apache.cxf.tools.wadlto.jaxrs.JAXRSContainer.execute(JAXRSContainer.java:58)
>       at 
> org.apache.cxf.tools.wadlto.jaxrs.JAXRSContainer.execute(JAXRSContainer.java:67)
>       ... 26 more

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