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Date: Tue, 11 Dec 2007 00:37:43 -0800 (PST)
From: "Andrea Bernardo Ciddio (JIRA)" <jira@apache.org>
To: notifications@ant.apache.org
Subject: [jira] Closed: (IVY-659) NPE in namespace transformation during the
 ivy:findrevision and ivy:resolve task execution
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     [ https://issues.apache.org/jira/browse/IVY-659?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrea Bernardo Ciddio closed IVY-659.
--------------------------------------


> NPE in namespace transformation during the ivy:findrevision and ivy:resolve task execution
> ------------------------------------------------------------------------------------------
>
>                 Key: IVY-659
>                 URL: https://issues.apache.org/jira/browse/IVY-659
>             Project: Ivy
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 2.0.0-alpha-1, 2.0.0-alpha-2, 2.0.0-beta-1, 2.0
>            Reporter: Andrea Bernardo Ciddio
>            Assignee: Gilles Scokart
>            Priority: Critical
>             Fix For: 2.0.0-beta-2
>
>
> While executing this ant code
> {code:xml} 
> [...]
> 	<target name="build">
> 		<ivy:findrevision organisation="apache" module="ant" revision="latest.integration" property="test"/>
> 		<echo message="Latest revision: ${test}" />
> 	</target>
> [...]
> {code}
> using this ivy settings file:
> {code:xml}
> <ivysettings>
> 	<settings defaultResolver="m2" defaultConflictManager="all" />
> 	<resolvers>
> 		<ibiblio name="m2" m2compatible="true"
> 				namespace="test-ns" root="${public.root}" pattern="${public.pattern}" />
> 	</resolvers>
> 	<namespaces>
> 		<namespace name="test-ns">
> 				<rule>
> 					<fromsystem>
> 						<src org=".*" module="([^-]+)[-]*.*"/>
> 						<dest org="org.$o0.$m1" module="$m0" />
> 					</fromsystem>
> 					<tosystem>
> 						<src org="org\.([^.]+)\..*" module=".+" />
> 						<dest org="$o1" module="$m0" />
> 					</tosystem>
> 				</rule>
> 			</namespace>
> 	</namespaces>
> </ivysettings>
> {code}
> a NullPointerException is raised:
> {code}
> java.lang.NullPointerException
>         at org.apache.ivy.plugins.namespace.MRIDTransformationRule$MridRuleMatcher.match(MRIDTransformationRule.java:38)
>         at org.apache.ivy.plugins.namespace.MRIDTransformationRule.transform(MRIDTransformationRule.java:133)
>         at org.apache.ivy.plugins.namespace.Namespace$2.transform(Namespace.java:65)
>         at org.apache.ivy.core.module.descriptor.DefaultDependencyDescriptor.transformInstance(DefaultDependencyDescriptor.java:82)
>         at org.apache.ivy.plugins.namespace.NameSpaceHelper.transform(NameSpaceHelper.java:42)
>         at org.apache.ivy.plugins.resolver.AbstractResolver.toSystem(AbstractResolver.java:266)
>         at org.apache.ivy.plugins.resolver.BasicResolver.parse(BasicResolver.java:426)
>         at org.apache.ivy.plugins.resolver.BasicResolver.getDependency(BasicResolver.java:265)
>         at org.apache.ivy.plugins.resolver.IBiblioResolver.getDependency(IBiblioResolver.java:206)
>         at org.apache.ivy.core.resolve.ResolveEngine.findModule(ResolveEngine.java:945)
>         at org.apache.ivy.Ivy.findModule(Ivy.java:642)
>         at org.apache.ivy.ant.IvyFindRevision.doExecute(IvyFindRevision.java:98)
>         at org.apache.ivy.ant.IvyTask.execute(IvyTask.java:275)
>         at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
>         at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
>         at org.apache.tools.ant.Task.perform(Task.java:348)
>         at org.apache.tools.ant.Target.execute(Target.java:357)
>         at org.apache.tools.ant.Target.performTasks(Target.java:385)
>         at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
>         at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:38)
>         at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
>         at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:416)
>         at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:105)
>         at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
>         at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
>         at org.apache.tools.ant.Task.perform(Task.java:348)
>         at org.apache.tools.ant.Target.execute(Target.java:357)
>         at org.apache.tools.ant.Target.performTasks(Target.java:385)
>         at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
>         at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
>         at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
>         at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
>         at org.apache.tools.ant.Main.runBuild(Main.java:698)
>         at org.apache.tools.ant.Main.startAnt(Main.java:199)
>         at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
>         at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
> {code}
> The same thing happens when calling ivy:resolve.
> It has something to do with the way the ResolveEngine creates the DependencyDescriptor:
> {code}
> [...]
> try {
>    return r.getDependency(new DefaultDependencyDescriptor(id, true), new ResolveData(this,
>                     options, new ConfigurationResolveReport(this, md, "default", null, options)));
> } catch (ParseException e) {
>             throw new RuntimeException("problem while parsing repository module descriptor for "
>                     + id + ": " + e, e);
> }
> [...]
> {code}
> that does not set the parent revision id of the descriptor (leaving it null). After some digging into the code I wrote a simple patch that fixes this issue:
> {code}
> Index: org/apache/ivy/plugins/namespace/Namespace.java
> ===================================================================
> --- org/apache/ivy/plugins/namespace/Namespace.java     (revision 601926)
> +++ org/apache/ivy/plugins/namespace/Namespace.java     (working copy)
> @@ -37,6 +37,8 @@
>  
>      private NamespaceTransformer fromSystemTransformer = new NamespaceTransformer() {
>          public ModuleRevisionId transform(ModuleRevisionId mrid) {
> +               if (mrid == null)
> +                       return null;
>              for (Iterator iter = rules.iterator(); iter.hasNext();) {
>                  NamespaceRule rule = (NamespaceRule) iter.next();
>                  ModuleRevisionId nmrid = rule.getFromSystem().transform(mrid);
> @@ -56,6 +58,8 @@
>  
>      private NamespaceTransformer toSystemTransformer = new NamespaceTransformer() {
>          public ModuleRevisionId transform(ModuleRevisionId mrid) {
> +               if (mrid == null)
> +                       return null;
>              for (Iterator iter = rules.iterator(); iter.hasNext();) {
>                  NamespaceRule rule = (NamespaceRule) iter.next();
>                  ModuleRevisionId nmrid = rule.getToSystem().transform(mrid);
> {code}
> Hope that's useful.

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