Re: [platform-ant-dev] Using other eclipse plugin resources from contrib

[Chris McGee <cbmcgee@xxxxxxxxxx>]

Hi Darin,

I tried separating the task class from the rest of the plugin and gave it its own jar. When I compile the task class I add the rest of my plugin to the classpath so that it can compile with references to classes in my plugin. I don't have any references in my plugin to the task jar and my plugin.xml makes no reference to it except for the ant task extension.

I tried running my task and it half-workd just as before. It will dump some output and as soon as it tries to instantiate on of my plugin classes, it produces the following stack trace in Eclipse 3.0M6:

[diagram] org.osgi.framework.BundleException: Exception in org.eclipse.core.internal.compatibility.PluginActivator.start()

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext.startActivator(BundleContext.java:1071)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext.start(BundleContext.java:991)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:403)

[diagram] at org.eclipse.osgi.framework.internal.core.Bundle.start(Bundle.java:312)

[diagram] at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass(EclipseClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.requireClass(BundleLoader.java(Inlined Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findRequiredClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.adaptor.BundleClassLoader.loadClass(BundleClassLoader.java(Compiled Code))

[diagram] at java.lang.ClassLoader.loadClass(ClassLoader.java(Compiled Code))

[diagram] at java.lang.ClassLoader.defineClass0(Native Method)

[diagram] at java.lang.ClassLoader.defineClass(ClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.defaultadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java(Inlined Compiled Code))

[diagram] at org.eclipse.core.runtime.adaptor.EclipseClassLoader.defineClass(EclipseClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.defaultadaptor.DefaultClassLoader.findClassImpl(DefaultClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.defaultadaptor.DefaultClassLoader.findClass(DefaultClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.adaptor.BundleClassLoader.findLocalClass(BundleClassLoader.java(Inlined Compiled Code))

[diagram] at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass(EclipseClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.adaptor.BundleClassLoader.loadClass(BundleClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass(BundleLoader.java(Inlined Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.Bundle.loadClass(Bundle.java(Compiled Code))

[diagram] at org.eclipse.core.internal.plugins.PluginDescriptor.internalDoPluginActivation(PluginDescriptor.java:471)

[diagram] at org.eclipse.core.internal.plugins.PluginDescriptor.doPluginActivation(PluginDescriptor.java:438)

[diagram] at org.eclipse.core.internal.plugins.PluginDescriptor.getPlugin(PluginDescriptor.java:406)

[diagram] at org.eclipse.core.internal.compatibility.PluginActivator.start(PluginActivator.java:48)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext$1.run(BundleContext.java:1054)

[diagram] at java.security.AccessController.doPrivileged1(Native Method)

[diagram] at java.security.AccessController.doPrivileged(AccessController.java:350)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext.startActivator(BundleContext.java:1050)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext.start(BundleContext.java:991)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:403)

[diagram] at org.eclipse.osgi.framework.internal.core.Bundle.start(Bundle.java:312)

[diagram] at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass(EclipseClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.requireClass(BundleLoader.java(Inlined Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findRequiredClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.adaptor.BundleClassLoader.loadClass(BundleClassLoader.java(Compiled Code))

[diagram] at java.lang.ClassLoader.loadClass(ClassLoader.java(Compiled Code))

[diagram] at com.ibm.xtools.exportjavadoc.internal.JavadocOperation.<init>(JavadocOperation.java:47)

[diagram] at ... CustomTask.execute(Unknown Source)

[diagram] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:306)

[diagram] at org.apache.tools.ant.Task.perform(Task.java:401)

[diagram] at org.apache.tools.ant.Target.execute(Target.java:338)

[diagram] at org.apache.tools.ant.Target.performTasks(Target.java:365)

[diagram] at org.apache.tools.ant.Project.executeTarget(Project.java:1237)

[diagram] at org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:661)

[diagram] at org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:438)

[diagram] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

[diagram] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:84)

[diagram] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

[diagram] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))

[diagram] at java.lang.reflect.Method.invoke(Method.java(Compiled Code))

[diagram] at org.eclipse.ant.core.AntRunner.run(AntRunner.java:342)

[diagram] at org.eclipse.ant.internal.ui.launchConfigurations.AntLaunchDelegate.launch(AntLaunchDelegate.java:225)

[diagram] at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:157)

[diagram] at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:778)

[diagram] at org.eclipse.debug.ui.DebugUITools.buildAndLaunch(DebugUITools.java:628)

[diagram] at org.eclipse.debug.ui.DebugUITools$2.run(DebugUITools.java:536)

[diagram] at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:101)

[diagram] java.lang.ExceptionInInitializerError

[diagram] at some.plugin.somePlugin.<clinit>(somePlugin.java:49)

[diagram] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

[diagram] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:79)

[diagram] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java(Compiled Code))

[diagram] at java.lang.reflect.Constructor.newInstance(Constructor.java(Compiled Code))

[diagram] at org.eclipse.core.internal.plugins.PluginDescriptor.internalDoPluginActivation(PluginDescriptor.java:488)

[diagram] at org.eclipse.core.internal.plugins.PluginDescriptor.doPluginActivation(PluginDescriptor.java:438)

[diagram] at org.eclipse.core.internal.plugins.PluginDescriptor.getPlugin(PluginDescriptor.java:406)

[diagram] at org.eclipse.core.internal.compatibility.PluginActivator.start(PluginActivator.java:48)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext$1.run(BundleContext.java:1054)

[diagram] at java.security.AccessController.doPrivileged1(Native Method)

[diagram] at java.security.AccessController.doPrivileged(AccessController.java:350)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext.startActivator(BundleContext.java:1050)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext.start(BundleContext.java:991)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:403)

[diagram] at org.eclipse.osgi.framework.internal.core.Bundle.start(Bundle.java:312)

[diagram] at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass(EclipseClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.requireClass(BundleLoader.java(Inlined Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findRequiredClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.adaptor.BundleClassLoader.loadClass(BundleClassLoader.java(Compiled Code))

[diagram] at java.lang.ClassLoader.loadClass(ClassLoader.java(Compiled Code))

[diagram] at java.lang.ClassLoader.defineClass0(Native Method)

[diagram] at java.lang.ClassLoader.defineClass(ClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.defaultadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java(Inlined Compiled Code))

[diagram] at org.eclipse.core.runtime.adaptor.EclipseClassLoader.defineClass(EclipseClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.defaultadaptor.DefaultClassLoader.findClassImpl(DefaultClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.defaultadaptor.DefaultClassLoader.findClass(DefaultClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.adaptor.BundleClassLoader.findLocalClass(BundleClassLoader.java(Inlined Compiled Code))

[diagram] at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass(EclipseClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.adaptor.BundleClassLoader.loadClass(BundleClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass(BundleLoader.java(Inlined Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.Bundle.loadClass(Bundle.java(Compiled Code))

[diagram] at org.eclipse.core.internal.plugins.PluginDescriptor.internalDoPluginActivation(PluginDescriptor.java:471)

[diagram] at org.eclipse.core.internal.plugins.PluginDescriptor.doPluginActivation(PluginDescriptor.java:438)

[diagram] at org.eclipse.core.internal.plugins.PluginDescriptor.getPlugin(PluginDescriptor.java:406)

[diagram] at org.eclipse.core.internal.compatibility.PluginActivator.start(PluginActivator.java:48)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext$1.run(BundleContext.java:1054)

[diagram] at java.security.AccessController.doPrivileged1(Native Method)

[diagram] at java.security.AccessController.doPrivileged(AccessController.java:350)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext.startActivator(BundleContext.java:1050)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext.start(BundleContext.java:991)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:403)

[diagram] at org.eclipse.osgi.framework.internal.core.Bundle.start(Bundle.java:312)

[diagram] at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass(EclipseClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.requireClass(BundleLoader.java(Inlined Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findRequiredClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.adaptor.BundleClassLoader.loadClass(BundleClassLoader.java(Compiled Code))

[diagram] at java.lang.ClassLoader.loadClass(ClassLoader.java(Compiled Code))

[diagram] at someplugin.someOperation.<init>(someOperation.java:47)

[diagram] at someplugin.CustomTask.execute(Unknown Source)

[diagram] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:306)

[diagram] at org.apache.tools.ant.Task.perform(Task.java:401)

[diagram] at org.apache.tools.ant.Target.execute(Target.java:338)

[diagram] at org.apache.tools.ant.Target.performTasks(Target.java:365)

[diagram] at org.apache.tools.ant.Project.executeTarget(Project.java:1237)

[diagram] at org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:661)

[diagram] at org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:438)

[diagram] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

[diagram] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:84)

[diagram] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

[diagram] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))

[diagram] at java.lang.reflect.Method.invoke(Method.java(Compiled Code))

[diagram] at org.eclipse.ant.core.AntRunner.run(AntRunner.java:342)

[diagram] at org.eclipse.ant.internal.ui.launchConfigurations.AntLaunchDelegate.launch(AntLaunchDelegate.java:225)

[diagram] at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:157)

[diagram] at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:778)

[diagram] at org.eclipse.debug.ui.DebugUITools.buildAndLaunch(DebugUITools.java:628)

[diagram] at org.eclipse.debug.ui.DebugUITools$2.run(DebugUITools.java:536)

[diagram] at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:101)

[diagram] Caused by: org.eclipse.jface.util.Assert$AssertionFailedException: null argument;

[diagram] at org.eclipse.jface.util.Assert.isNotNull(Assert.java:139)

[diagram] at org.eclipse.jface.util.Assert.isNotNull(Assert.java:116)

[diagram] at org.eclipse.jface.resource.ImageRegistry.<init>(ImageRegistry.java:66)

[diagram] at org.eclipse.jface.resource.ImageRegistry.<init>(ImageRegistry.java:58)

<Some custom plugin resource manager stuff here>

[diagram] org.osgi.framework.BundleException: Exception in org.eclipse.core.internal.compatibility.PluginActivator.start()

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext.startActivator(BundleContext.java:1071)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext.start(BundleContext.java:991)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:403)

[diagram] at org.eclipse.osgi.framework.internal.core.Bundle.start(Bundle.java:312)

[diagram] at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass(EclipseClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.requireClass(BundleLoader.java(Inlined Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findRequiredClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.adaptor.BundleClassLoader.loadClass(BundleClassLoader.java(Compiled Code))

[diagram] at java.lang.ClassLoader.loadClass(ClassLoader.java(Compiled Code))

[diagram] at someplugin.someOperation.<init>(someOperation.java:47)

[diagram] at someplugin.CustomTask.execute(Unknown Source)

[diagram] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:306)

[diagram] at org.apache.tools.ant.Task.perform(Task.java:401)

[diagram] at org.apache.tools.ant.Target.execute(Target.java:338)

[diagram] at org.apache.tools.ant.Target.performTasks(Target.java:365)

[diagram] at org.apache.tools.ant.Project.executeTarget(Project.java:1237)

[diagram] at org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:661)

[diagram] at org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:438)

[diagram] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

[diagram] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:84)

[diagram] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

[diagram] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))

[diagram] at java.lang.reflect.Method.invoke(Method.java(Compiled Code))

[diagram] at org.eclipse.ant.core.AntRunner.run(AntRunner.java:342)

[diagram] at org.eclipse.ant.internal.ui.launchConfigurations.AntLaunchDelegate.launch(AntLaunchDelegate.java:225)

[diagram] at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:157)

[diagram] at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:778)

[diagram] at org.eclipse.debug.ui.DebugUITools.buildAndLaunch(DebugUITools.java:628)

[diagram] at org.eclipse.debug.ui.DebugUITools$2.run(DebugUITools.java:536)

[diagram] at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:101)

[diagram] java.lang.NoClassDefFoundError: com/ibm/xtools/common/ui/internal/plugin/XToolsUIPlugin

[diagram] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

[diagram] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:79)

[diagram] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java(Compiled Code))

[diagram] at java.lang.reflect.Constructor.newInstance(Constructor.java(Compiled Code))

[diagram] at org.eclipse.core.internal.plugins.PluginDescriptor.internalDoPluginActivation(PluginDescriptor.java:488)

[diagram] at org.eclipse.core.internal.plugins.PluginDescriptor.doPluginActivation(PluginDescriptor.java:438)

[diagram] at org.eclipse.core.internal.plugins.PluginDescriptor.getPlugin(PluginDescriptor.java:406)

[diagram] at org.eclipse.core.internal.compatibility.PluginActivator.start(PluginActivator.java:48)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext$1.run(BundleContext.java:1054)

[diagram] at java.security.AccessController.doPrivileged1(Native Method)

[diagram] at java.security.AccessController.doPrivileged(AccessController.java:350)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext.startActivator(BundleContext.java:1050)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleContext.start(BundleContext.java:991)

[diagram] at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:403)

[diagram] at org.eclipse.osgi.framework.internal.core.Bundle.start(Bundle.java:312)

[diagram] at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass(EclipseClassLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.requireClass(BundleLoader.java(Inlined Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findRequiredClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java(Compiled Code))

[diagram] at org.eclipse.osgi.framework.adaptor.BundleClassLoader.loadClass(BundleClassLoader.java(Compiled Code))

[diagram] at java.lang.ClassLoader.loadClass(ClassLoader.java(Compiled Code))

[diagram] at someplugin.someOperation.<init>(someOperation.java:47)

[diagram] at someplugin.CustomTask.execute(Unknown Source)

[diagram] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:306)

[diagram] at org.apache.tools.ant.Task.perform(Task.java:401)

[diagram] at org.apache.tools.ant.Target.execute(Target.java:338)

[diagram] at org.apache.tools.ant.Target.performTasks(Target.java:365)

[diagram] at org.apache.tools.ant.Project.executeTarget(Project.java:1237)

[diagram] at org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:661)

[diagram] at org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:438)

[diagram] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

[diagram] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:84)

[diagram] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

[diagram] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))

[diagram] at java.lang.reflect.Method.invoke(Method.java(Compiled Code))

[diagram] at org.eclipse.ant.core.AntRunner.run(AntRunner.java:342)

[diagram] at org.eclipse.ant.internal.ui.launchConfigurations.AntLaunchDelegate.launch(AntLaunchDelegate.java:225)

[diagram] at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:157)

[diagram] at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:778)

[diagram] at org.eclipse.debug.ui.DebugUITools.buildAndLaunch(DebugUITools.java:628)

[diagram] at org.eclipse.debug.ui.DebugUITools$2.run(DebugUITools.java:536)

[diagram] at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:101)

BUILD FAILED: java.lang.NullPointerException

I'm kinda baffled here. It's like the plugin class loader is failing for some reason. I'm not sure if this is because of the classloader in Eclipse 3.0M6 or if its because of what I'm trying to do. I know that other people on my team have seen some classloader problems in the new eclipse 3.0M7.

Thanks again for the help,

Chris


Thursday, February 19, 2004 4:35 PM
To: platform-ant-dev@xxxxxxxxxxx
cc:
From: Darin Swanson <Darin_Swanson@xxxxxxxxxx>
Subject: Re: [platform-ant-dev] Using other eclipse plugin resources from contributed ant task.

You are asking for all kinds of trouble bundling your 
task with the runtime JAR of your plugin. This will not work. 
See the important rules section of 
http://help.eclipse.org/help21/index.jsp?topic=/org.eclipse.platform.doc.isv/guide/ant_contributing_task.htm 

Currently your task is getting loaded by 
the plugin classloader. All of the Ant classes are getting loaded by the 
AntClassLoader. 
This leads to strange 
NPEs and "instance of" checks failing. 
They way we achieve this is to have a separate source folder and output 
location for the JARs we bundle to add to the Ant runtime classpath and ensure 
these are not in the JARs generated for our plugin. 

HTH 
Darins

Chris McGee <cbmcgee@xxxxxxxxxx> Sent by: platform-ant-dev-admin@xxxxxxxxxxx 02/19/04 01:16 PM Please respond to platform-ant-dev

To:        platform-ant-dev@xxxxxxxxxxx         cc:                 Subject:        Re: [platform-ant-dev] Using other eclipse plugin resources from contributed ant task.

Thanks 
for the info.

I managed to get the task to work fairly well as a member 
of my plugin as you suggested. For the library, I just set the xml attribute to 
"" and it seems to pick up the class from the jar for the plugin.

I must 
be running into some problems with eclipse 3.0 M6 and its classloader. There are 
some classes that I can access beyond my plugin, there are others that I can 
access beyond my plugin if I run the ant script twice (very strange) and there 
are still others that I cannot execute without exceptions being generated in the 
OSGi plugin loading code.

Thanks for the 
clarifications,

Chris

Thursday, February 19, 2004 4:11 PM
To: 
platform-ant-dev@xxxxxxxxxxx
cc: 
From: Darin Swanson 
<Darin_Swanson@xxxxxxxxxx>
Subject: Re: [platform-ant-dev] Using other 
eclipse plugin resources from contributed ant task.


I must have mislead you. 
You get all the 
classloader "magic" for free by using the extension point and setting the 
correct requirements for your plugin in the plugin.xml. 
You 
should be able to reference any class from your Ant task if that class is within 
the requirements chain for your plugin. 
The classloader for that class 
will be the plugin classloader. 
Using that classloader you can access 
the resource you need. 

To get around using the bin 
directory as the library attribute value, we make use of the external tool 
builder support to automatically generate our JARs whenever we modify the source 
for the component classes of the JARs. 

I hope I have made things 
clearer... 
Darins

Chris McGee <cbmcgee@xxxxxxxxxx> Sent by: platform-ant-dev-admin@xxxxxxxxxxx 02/19/04 11:50 AM Please respond to platform-ant-dev

To:        platform-ant-dev@xxxxxxxxxxx        cc:                Subject:        Re: [platform-ant-dev] Using other eclipse plugin resources from contributed ant task.

Hi 
Darins,

Thanks for the response.

I've defined my task using the 
extension point. What should I specify as the library tag that would normally be 
pointing to a JAR with my task? Right now, I've tried just specifying the "bin" 
directory and it seems to work alright until we decide to package this stuff. 
The ClassLoaders seem to be very fragile and will load certain classes just fine 
but throw NPE's on others.

How does one get access to the AntClassLoader? 
I'm assuming that I could get the Class for the task I've defined, and ask the 
class for its classloader, which would be the one used in ant. After that, how 
can you set the classloader's parent?

Chris



Thursday, February 19, 2004 2:25 
PM
To: platform-ant-dev@xxxxxxxxxxx
cc: 
From: Darin Swanson 
<Darin_Swanson@xxxxxxxxxx>
Subject: Re: [platform-ant-dev] Using other 
eclipse plugin resources from contributed ant task.


If the dependancies are set up correctly for the 
plugin you are providing the task from. 
Using the Eclipse extension 
point for defining tasks, the plugin classloader for the plugin contributing the 
task is added as a parent classloader of the AntClassLoader that is used during 
the build. 

Then you could get a class from the other plugin, 
get its classloader and ask that classloader to load the resource. 
I have 
not tried it but it should work...famous last words :-) 

HTH 
Darins

Chris McGee <cbmcgee@xxxxxxxxxx> Sent by: platform-ant-dev-admin@xxxxxxxxxxx 02/19/04 10:52 AM Please respond to platform-ant-dev

To:        platform-ant-dev@xxxxxxxxxxx       cc:               Subject:        [platform-ant-dev] Using other eclipse plugin resources from contributed ant task.

Hi 
All,

Sorry if this question has an obvious answer. I'm just starting to 
learn
about Ant and its integration into Eclipse 3.

Is it possible to 
define an Ant task in one of my plugins so that it may
access the other 
plugins that the plugin has dependencies? I'm able to get
an Ant task to work 
by creating a separate Jar that is not loaded as part
of my plugin but I 
would like ant task to have access to all of the
resources available from the 
other plugins.

Thanks,

Chris McGee
IBM
Ottawa, 
Canada

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