訪問Eclipse可部署插件中的資源

Question

我正在開發一個Eclipse插件。 裏面我的插件，我有以下代碼：

Bundle bundle = Platform.getBundle("org.eclipse.acceleo.EcoreDiff2EDelta"); 
URL fileURL = bundle.getEntry("src/metamodel/EcoreDiff.ecore"); 
String uri = null; 
try { 
     uri = FileLocator.resolve(fileURL).getFile(); 
    } catch (IOException e1) { 
     e1.printStackTrace(); 
    } 

    Resource resource = resourceSet.getResource(URI.createURI(uri), true); 

此代碼訪問駐留我的插件內，在src /元模型文件夾中的資源（EcoreDiff.ecore）。 當我通過右鍵單擊項目文件夾運行插件 - >運行 - > eclipse應用程序一切工作正常。 但是，如果我將插件導出爲「Deployable Plugin and Fragments」 我得到後面的堆棧跟蹤，這基本上意味着它無法找到EcoreDiff.ecore文件。 我一直在試圖解決這一兩天，我不明白什麼是錯......

java.lang.reflect.InvocationTargetException 
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:421) 
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507) 
at org.eclipse.ui.internal.progress.ProgressMonitorJobsDialog.run(ProgressMonitorJobsDialog.java:275) 
at org.eclipse.ui.internal.progress.ProgressManager$3.run(ProgressManager.java:960) 
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) 
at org.eclipse.ui.internal.progress.ProgressManager.busyCursorWhile(ProgressManager.java:995) 
at org.eclipse.ui.internal.progress.ProgressManager.busyCursorWhile(ProgressManager.java:970) 
at org.eclipse.ui.internal.progress.ProgressManager.run(ProgressManager.java:1166) 
at org.eclipse.acceleo.EcoreDiff2EDelta.ui.popupMenus.AcceleoGenerateEcoreDiff2EDeltaAction.run(AcceleoGenerateEcoreDiff2EDeltaAction.java:91) 
at org.eclipse.ui.actions.ActionDelegate.runWithEvent(ActionDelegate.java:70) 
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:241) 
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:1053) 
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4169) 
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3758) 
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1022) 
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) 
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:916) 
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86) 
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:585) 
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) 
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:540) 
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) 
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124) 
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:353) 
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
at java.lang.reflect.Method.invoke(Unknown Source) 
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629) 
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584) 
at org.eclipse.equinox.launcher.Main.run(Main.java:1438) 
at org.eclipse.equinox.launcher.Main.main(Main.java:1414) 
Caused by: java.lang.NullPointerException 
at org.eclipse.core.internal.runtime.Activator.getURLConverter(Activator.java:321) 
at org.eclipse.core.runtime.FileLocator.resolve(FileLocator.java:227) 
at org.eclipse.acceleo.EcoreDiff2EDelta.main.Generate.registerPackages(Generate.java:359) 
at org.eclipse.acceleo.engine.service.AbstractAcceleoGenerator.initialize(AbstractAcceleoGenerator.java:422) 
at org.eclipse.acceleo.EcoreDiff2EDelta.main.Generate.<init>(Generate.java:97) 
at org.eclipse.acceleo.EcoreDiff2EDelta.ui.common.GenerateAll.doGenerate(GenerateAll.java:90) 
at org.eclipse.acceleo.EcoreDiff2EDelta.ui.popupMenus.AcceleoGenerateEcoreDiff2EDeltaAction$1.run(AcceleoGenerateEcoreDiff2EDeltaAction.java:76) 
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121) 
Root exception: 
java.lang.NullPointerException 
at org.eclipse.core.internal.runtime.Activator.getURLConverter(Activator.java:321) 
at org.eclipse.core.runtime.FileLocator.resolve(FileLocator.java:227) 
at org.eclipse.acceleo.EcoreDiff2EDelta.main.Generate.registerPackages(Generate.java:359) 
at org.eclipse.acceleo.engine.service.AbstractAcceleoGenerator.initialize(AbstractAcceleoGenerator.java:422) 
at org.eclipse.acceleo.EcoreDiff2EDelta.main.Generate.<init>(Generate.java:97) 
at org.eclipse.acceleo.EcoreDiff2EDelta.ui.common.GenerateAll.doGenerate(GenerateAll.java:90) 
at org.eclipse.acceleo.EcoreDiff2EDelta.ui.popupMenus.AcceleoGenerateEcoreDiff2EDeltaAction$1.run(AcceleoGenerateEcoreDiff2EDeltaAction.java:76) 
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121) 

Answer 1

在已部署的插件，「元模型」應該是在你的JAR的根文件夾，如果它是在build.properties中指定的。如果你在罐子裏看，它在嗎？

然後嘗試：

URL url = bundle.getEntry("metamodel/EcoreDiff.ecore"); 
URL fileURL = org.eclipse.core.runtime.FileLocator.toFileURL(URL);