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Build Identifier: 4.2 I20111206-1015 A contribution like this behaves differently on 3.7 and 4.2: <extension point="org.eclipse.ui.menus"> <menuContribution allPopups="false" locationURI="toolbar:org.eclipse.ui.main.toolbar"> <toolbar id="com.example.addressbook.toolbar1"> <command commandId="org.eclipse.ui.file.save" style="push"> </command> <command commandId="org.eclipse.ui.file.exit" style="push"> </command> </toolbar> </menuContribution> <menuContribution allPopups="true" locationURI="popup:org.eclipse.ui.popup.any"> <command commandId="org.eclipse.ui.edit.delete" style="push"> <visibleWhen checkEnabled="false"> <with variable="selection"> <iterate ifEmpty="false" operator="and"> <instanceof value="com.example.addressbook.Country"> </instanceof> </iterate> </with> </visibleWhen> </command> </menuContribution> </extension> - On 3.7 the save command will be disabled because no savable part is open, on 4.2 the save command is activated, and when clicked, it throws: !MESSAGE The proxied handler for 'org.eclipse.ui.internal.handlers.SaveHandler' could not be loaded !STACK 1 org.eclipse.core.runtime.CoreException: Plug-in org.eclipse.ui was unable to load class org.eclipse.ui.internal.handlers.SaveHandler. at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:194) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:176) at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905) at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243) at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55) at org.eclipse.ui.internal.handlers.HandlerProxy.loadHandler(HandlerProxy.java:350) at org.eclipse.ui.internal.handlers.HandlerProxy.setEnabled(HandlerProxy.java:230) at org.eclipse.ui.internal.handlers.E4HandlerProxy.canExecute(E4HandlerProxy.java:50) 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.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56) at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:228) at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:209) at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:123) at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.canExecute(HandlerServiceImpl.java:108) at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.canExecuteItem(HandledContributionItem.java:731) at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.access$1(HandledContributionItem.java:720) at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem$2.run(HandledContributionItem.java:178) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.updateItemEnablement(HandledContributionItem.java:205) at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem$ToolItemUpdateTimer.run(HandledContributionItem.java:123) at org.eclipse.swt.widgets.Display.runTimers(Display.java:4107) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3605) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:977) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:893) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:91) at org.eclipse.ui.internal.Workbench$3.run(Workbench.java:565) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:520) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at com.example.addressbook.Application.start(Application.java:20) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:352) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) 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.eclipse.equinox.launcher.Main.invokeFramework(Main.java:624) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:579) at org.eclipse.equinox.launcher.Main.run(Main.java:1433) at org.eclipse.equinox.launcher.Main.main(Main.java:1409) Caused by: java.lang.ClassNotFoundException: org.eclipse.ui.internal.handlers.SaveHandler at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:501) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:421) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:412) at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at org.eclipse.osgi.internal.loader.BundleLoader.loadClass(BundleLoader.java:340) at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:229) at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1212) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:174) ... 45 more - On 4.2, when opening the popup menu the first time, the command will be shown two times (see screenshot). Reproducible: Always Steps to Reproduce: 1. Import the attached example project. 2. Run the included product (adding equinox.concurrent/equinox.event + all required bundles manually in the run configuration) 3. See/click the save button in the toolbar. 4. Click the table viewer in the view on the left.
Created attachment 208079 [details] Example project
Created attachment 208080 [details] Screenshot showing the duplicate delete command
The exception is because org.eclipse.ui/plugin.xml still defines org.eclipse.ui.internal.handlers.SaveHandler as the default handler for org.eclipse.ui.file.save. In 3.7 the default handler exists and returns disabled. PW
as commit 87e62667fba514637e36765121e7d17763ed013b
in I20120123-2200 PW
