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POAbstractUIPlugin causing NoClassDefFoundError
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copied!<p>I am writing an Eclipse plugin that supports automated testing like JUnit. I have a Launch Configuration Delegate that launches my Main class, which will run the tests on the class the user provides.</p> <p>I want to programmatically show a custom View from my Eclipse plugin when I launch it with my Launch Configuration Delegate. I keep getting a NoClassDefFoundError for the AbstractUIPlugin class when I try to launch it even though I have included both org.eclipse.ui and org.eclipse.core.runtime in my plugin dependencies.</p> <p><strong>Stack Trace</strong></p> <pre><code>Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/ui/plugin/AbstractUIPlugin at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.access$100(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at eoo.thefamilycoder.specj.internal.launching.delegate.SpecJMain.main(SpecJMain.java:8) Caused by: java.lang.ClassNotFoundException: org.eclipse.ui.plugin.AbstractUIPlugin at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 13 more </code></pre> <p><strong>MANIFEST.MF</strong></p> <pre><code>Manifest-Version: 1.0 Bundle-ManifestVersion: 2 Bundle-Name: SpecJ Bundle-SymbolicName: eoo.thefamilycoder.specj;singleton:=true Bundle-Version: 1.0.0.alpha Bundle-Activator: eoo.thefamilycoder.specj.internal.Activator Require-Bundle: org.eclipse.ui;bundle-version="3.105.0", org.eclipse.core.runtime;bundle-version="3.9.0", org.eclipse.jdt.launching;bundle-version="3.7.0", org.eclipse.debug.core;bundle-version="3.8.0", org.eclipse.jdt.core;bundle-version="3.9.1", org.eclipse.debug.ui;bundle-version="3.9.0", org.eclipse.jdt.ui;bundle-version="3.9.1", org.eclipse.jdt.debug.ui;bundle-version="3.6.200" Bundle-RequiredExecutionEnvironment: JavaSE-1.7 Bundle-ActivationPolicy: lazy </code></pre> <p><strong>Main class</strong></p> <pre><code>import eoo.thefamilycoder.specj.internal.Activator; public class SpecJMain { public static void main(String[] args) { Activator.getDefault().showView(); } } </code></pre> <h2>What is causing the error, and how can I fix it?</h2> <p><strong>Edit:</strong> Adding launch code</p> <p><strong>Launch Configuration Delegate</strong></p> <pre><code>public class SpecJLaunchConfigurationDelegate extends AbstractJavaLaunchConfigurationDelegate { private static final int UNITS_OF_WORK = 4; @Override public void launch(final ILaunchConfiguration configuration, final String mode, final ILaunch launch, final IProgressMonitor monitor) throws CoreException { final IProgressMonitor pm = monitor != null ? monitor : new NullProgressMonitor(); pm.beginTask(configuration.getName(), UNITS_OF_WORK); if (pm.isCanceled()) return; try { preLaunchCheck(configuration, mode, pm); if (pm.isCanceled()) return; final VMRunnerConfiguration runConfig = new VMRunnerConfigurationFactory().create(configuration, monitor, this); if (pm.isCanceled()) return; getVMRunner(configuration, mode).run(runConfig, launch, pm); if (pm.isCanceled()) return; } finally { pm.done(); } } @Override public String[] getClasspath(ILaunchConfiguration configuration) throws CoreException { final String[] initialClasspath = super.getClasspath(configuration); final String pluginClasspath = new SpecJClasspathLocator().getClasspath(); System.out.println(pluginClasspath); if (pluginClasspath == null) return initialClasspath; final String[] classpath = new String[initialClasspath.length + 1]; classpath[0] = pluginClasspath; System.arraycopy(initialClasspath, 0, classpath, 1, initialClasspath.length); return classpath; } } </code></pre> <p><strong>VMRunnerConfigurationFactory</strong></p> <pre><code>public class VMRunnerConfigurationFactory { public VMRunnerConfiguration create(final ILaunchConfiguration configuration, final IProgressMonitor monitor, final AbstractJavaLaunchConfigurationDelegate delegate) throws CoreException { final ExecutionArguments execArgs = new ExecutionArguments(delegate.getVMArguments(configuration), ""); // Activator.MAIN_TYPE_NAME is the main class above final VMRunnerConfiguration runConfig = new VMRunnerConfiguration(Activator.MAIN_TYPE_NAME, delegate.getClasspath(configuration)); runConfig.setBootClassPath(delegate.getBootpath(configuration)); runConfig.setEnvironment(delegate.getEnvironment(configuration)); runConfig.setProgramArguments(new ProgramArgumentsFactory().create(configuration, monitor)); runConfig.setVMArguments(execArgs.getVMArgumentsArray()); runConfig.setVMSpecificAttributesMap(delegate.getVMSpecificAttributesMap(configuration)); runConfig.setWorkingDirectory(getWorkingDirectoryName(delegate.verifyWorkingDirectory(configuration))); return runConfig; } private String getWorkingDirectoryName(final File workingDir) throws CoreException { return workingDir != null ? workingDir.getAbsolutePath() : null; } } </code></pre>

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