I was able to work around the issue by adding the following to my plugin. It's
dirty, but it at least proves my suspicion:
FilteringClassLoader filter =
getServices().get(ClassLoaderRegistry).gradleApiClassLoader.parent
filter.allowPackage('org.apache.tools.zip')
filter.allowPackage('org.apache.commons.io')
-- John
On Monday, April 28, 2014 at 8:08 PM, John Engelman wrote:
> Hmm, that seems to be the problem, but I can't seem to figure out a way
> around this. What I'm trying to do is extend the Jar/Zip tasks in Gradle to
> copy the contents of Jar/Zip files using JarInputStream/JarOutputStreams
> instead of decompressing the files to a temporary directory copying them and
> then decompressing. I am doing this by overriding the 'createCopyAction'
> method to return a custom class that implements CopyAction. However, I cannot
> use the protected methods in the class else I run into the cast exceptions
> below.
>
> Is there a better way that I could do this or am I just going to be limited
> at this point?
>
> -- John
>
>
> On Monday, April 28, 2014 at 6:14 PM, John Engelman wrote:
>
> > As I was getting this stack trace, it occurred to me what is probably
> > happening. I think I was inadvertently using a class from
> > org.gradle.internal and that's where the error is coming from:
> >
> > Caused by: java.lang.ClassCastException:
> > org.apache.tools.zip.ZipOutputStream cannot be cast to
> > org.apache.tools.zip.ZipOutputStream
> > at
> > com.github.jengelman.gradle.plugins.shadow.tasks.ShadowCopyAction$1.execute(ShadowCopyAction.groovy)
> > at org.gradle.internal.IoActions.withResource(IoActions.java:74)
> > at org.gradle.internal.IoActions$withResource.call(Unknown Source)
> > at
> > org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
> > at
> > org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
> > at
> > org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120)
> > at
> > com.github.jengelman.gradle.plugins.shadow.tasks.ShadowCopyAction.execute(ShadowCopyAction.groovy:49)
> > at
> > org.gradle.api.internal.file.copy.NormalizingCopyActionDecorator.execute(NormalizingCopyActionDecorator.java:52)
> > at
> > org.gradle.api.internal.file.copy.DuplicateHandlingCopyActionDecorator.execute(DuplicateHandlingCopyActionDecorator.java:42)
> > at
> > org.gradle.api.internal.file.copy.CopyActionExecuter.execute(CopyActionExecuter.java:38)
> > at org.gradle.api.tasks.AbstractCopyTask.copy(AbstractCopyTask.java:65)
> > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> > at
> > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> > at
> > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> > at java.lang.reflect.Method.invoke(Method.java:606)
> > at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:63)
> > at
> > org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.doExecute(AnnotationProcessingTaskFactory.java:219)
> > at
> > org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:212)
> > at
> > org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:201)
> > at
> > org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:533)
> > at
> > org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:516)
> > at
> > org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80)
> > at
> > org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61)
> > ... 47 more
> >
> >
> > -- John
> >
> >
> > On Monday, April 28, 2014 at 5:51 PM, Adam Murdoch [via Gradle] wrote:
> >
> > >
> > > On 29 Apr 2014, at 12:40 am, John Engelman <[hidden email]
> > > (/user/SendEmail.jtp?type=node&node=5712626&i=0)> wrote:
> > > > Hey everyone -
> > > > I'm trying to write a plugin that uses the Apache ZipOutputStream class
> > > > in it and I can't seem to get it to work. The class appears to be
> > > > available via 'gradleApi()', but when I publish the plugin and install
> > > > it to a project, I end up with a
> > > > NoClassDefFoundException for ZipOutputStream.
> > > > Then I explicitly added the org.apache.ant:ant dependency to the plugin
> > > > and republished and now I get a ClassCastException:
> > > >
> > > > Caused by: java.lang.ClassCastException:
> > > > org.apache.tools.zip.ZipOutputStream cannot be cast to
> > > > org.apache.tools.zip.ZipOutputStream.
> > >
> > > Have you got a stack trace for this failure?
> > >
> > > --
> > > Adam Murdoch
> > > Gradle Co-founder
> > > http://www.gradle.org
> > > VP of Engineering, Gradleware Inc. - Gradle Training, Support, Consulting
> > > http://www.gradleware.com
> > >
> > > Join us for Gradle Summit 2014, June 12th and 13th in Santa Clara, CA:
> > > http://www.gradlesummit.com
> > >
> > >
> > > If you reply to this email, your message will be added to the discussion
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