【发布时间】：2011-11-16 09:42:40
【问题描述】：
我的 RCP 应用程序有问题。
首先，我在我的 plugin.xml 中定义了一个活动：
<extension
point="org.eclipse.ui.activities">
<activity
id="myproject.view.input.activity"
name="myproject.view.input.activity">
<enabledWhen>
<with
variable="myproject.view.input.active">
<equals
value="ENABLED">
</equals>
</with>
</enabledWhen>
</activity>
<activityPatternBinding
activityId="myproject.view.input.activity"
pattern="myproject.gui/myproject.view.input">
</activityPatternBinding>
然后我定义了我的 SourceProvider：
<extension
point="org.eclipse.ui.services">
<sourceProvider
provider="myproject.util.CommandState">
<variable
name="myproject.view.input.active"
priorityLevel="workbench">
</variable>
最后，我的 CommandState 类：
public class CommandState extends AbstractSourceProvider {
public final static String OUTPUT_VIEW = "myproject.view.input.active";
// then goes some others variables, i just skip them
// ....
public final static String [] ACTIONS = {OUTPUT_VIEW /*and all others variables*/};
public final static String ENABLED = "ENABLED";
public final static String DISENABLED = "DISENABLED";
private final Map <String, String> currentState = new HashMap <String, String> ();
@Override
public void dispose() {
}
@Override
public String[] getProvidedSourceNames() {
return ACTIONS;
}
@Override
public Map <String, String> getCurrentState() {
return currentState;
}
public void setEnabled(boolean enabled, String [] commands) {
String value = enabled ? ENABLED : DISENABLED;
for (String command : commands) {
currentState.put(command, value);
fireSourceChanged(ISources.WORKBENCH, command, value);
}
}
}
在我的登录窗口中，应用程序检查用户权限，并使用 CommandState 的 setEnabled 方法启用或禁用视图、命令等。对于它工作正常的命令，它们正在正确启用或禁用（我以其他方式禁用它们，但即使我通过活动禁用它们，它也能正常工作，就像我描述的那样）。但是当我尝试禁用包含该视图（myproject.view.input）的视图并打开透视图时，它会在没有该视图的情况下打开，但也会引发异常：
!ENTRY org.eclipse.ui 4 4 2011-11-16 15:54:43.284
!MESSAGE Exception in org.eclipse.ui.internal.PageLayout.addView: org.eclipse.ui.PartInitException: Could not create view: myproject.view.input
!ENTRY org.eclipse.ui 4 4 2011-11-16 15:54:43.321
!MESSAGE Exception in org.eclipse.ui.internal.PageLayout.addView: org.eclipse.ui.PartInitException: Could not create view: myproject.view.input
!STACK 1
org.eclipse.ui.PartInitException: Could not create view: myproject.view.input
at org.eclipse.ui.internal.ViewFactory.createView(ViewFactory.java:158)
at org.eclipse.ui.internal.LayoutHelper.createView(LayoutHelper.java:162)
at org.eclipse.ui.internal.PageLayout.createView(PageLayout.java:543)
at org.eclipse.ui.internal.PageLayout.addView(PageLayout.java:416)
at org.eclipse.ui.internal.PageLayout.addStandaloneView(PageLayout.java:894)
at org.eclipse.ui.internal.registry.PerspectiveExtensionReader.processView(PerspectiveExtensionReader.java:295)
at org.eclipse.ui.internal.registry.PerspectiveExtensionReader.processExtension(PerspectiveExtensionReader.java:118)
at org.eclipse.ui.internal.registry.PerspectiveExtensionReader.readElement(PerspectiveExtensionReader.java:355)
at org.eclipse.ui.internal.registry.RegistryReader.readElements(RegistryReader.java:144)
at org.eclipse.ui.internal.registry.RegistryReader.readExtension(RegistryReader.java:155)
at org.eclipse.ui.internal.registry.RegistryReader.readRegistry(RegistryReader.java:176)
at org.eclipse.ui.internal.registry.PerspectiveExtensionReader.extendLayout(PerspectiveExtensionReader.java:82)
at org.eclipse.ui.internal.Perspective.loadPredefinedPersp(Perspective.java:818)
at org.eclipse.ui.internal.Perspective.createPresentation(Perspective.java:270)
at org.eclipse.ui.internal.Perspective.<init>(Perspective.java:156)
at org.eclipse.ui.internal.tweaklets.Workbench3xImplementation.createPerspective(Workbench3xImplementation.java:55)
at org.eclipse.ui.internal.WorkbenchPage.createPerspective(WorkbenchPage.java:1672)
at org.eclipse.ui.internal.WorkbenchPage.busySetPerspective(WorkbenchPage.java:1034)
at org.eclipse.ui.internal.WorkbenchPage.access$16(WorkbenchPage.java:1025)
at org.eclipse.ui.internal.WorkbenchPage$19.run(WorkbenchPage.java:3715)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchPage.setPerspective(WorkbenchPage.java:3713)
at org.eclipse.ui.handlers.ShowPerspectiveHandler.openPerspective(ShowPerspectiveHandler.java:146)
at org.eclipse.ui.handlers.ShowPerspectiveHandler.openOther(ShowPerspectiveHandler.java:118)
at org.eclipse.ui.handlers.ShowPerspectiveHandler.execute(ShowPerspectiveHandler.java:57)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:293)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:178)
at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:247)
at org.eclipse.ui.actions.PerspectiveMenu.runOther(PerspectiveMenu.java:376)
at org.eclipse.ui.actions.PerspectiveMenu$3.runWithEvent(PerspectiveMenu.java:130)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3540)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3161)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at myproject.arm.demo.Application.start(Application.java:28)
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:369)
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:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
at org.eclipse.equinox.launcher.Main.run(Main.java:1408)
at org.eclipse.equinox.launcher.Main.main(Main.java:1384)
!SUBENTRY 1 org.eclipse.ui 4 0 2011-11-16 15:54:43.322
!MESSAGE Could not create view: myproject.view.input
我尝试调试我的应用程序，在打开视图之前，我检查了我的 CommandState 源提供程序的 currentState，一切似乎都正常：所有变量值都是正确的并且 myproject.view.input.active = DISABLED
谁能说，为什么会抛出异常？感谢您的帮助或任何想法。对不起，大帖子和糟糕的语言
*已编辑：添加了完整的堆栈跟踪
【问题讨论】：
-
听起来与活动定义没有任何关系。我们需要堆栈跟踪以获得进一步的帮助...
标签： java eclipse-plugin eclipse-rcp