Команда переопределения org.mdmi.provider.BagItemProvider.createCopyCommand (домен EditingDomain, владелец EObject, помощник Helper) для копирования и вставки - PullRequest
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Команда переопределения org.mdmi.provider.BagItemProvider.createCopyCommand (домен EditingDomain, владелец EObject, помощник Helper) для копирования и вставки

0 голосов
/ 21 октября 2019

Я пытался, чтобы копирование и вставка работали с командой org.mdmi.provider.BagItemProvider.createCopyCommand (домен EditingDomain, владелец EObject, помощник Helper). Одна копия узла не дает никакой ошибки, но когда я вставляю ее, она дает узел с нулевыми значениями. Он не копирует свою семантику или значения. Когда я пытаюсь скопировать несколько узлов, выдает ошибку:

Ошибка: 

org.eclipse.emf.common.util.WrappedException: An exception was ignored during command execution
    at org.eclipse.emf.common.command.BasicCommandStack.handleError(BasicCommandStack.java:281)
    at org.eclipse.emf.common.command.BasicCommandStack.execute(BasicCommandStack.java:112)
    at org.eclipse.emf.edit.ui.action.CommandActionHandler.run(CommandActionHandler.java:86)
    at org.eclipse.ui.actions.BaseSelectionListenerAction.runWithEvent(BaseSelectionListenerAction.java:171)
    at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:580)
    at org.eclipse.jface.action.ActionContributionItem.lambda$4(ActionContributionItem.java:412)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4173)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3986)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3585)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1160)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1049)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
    at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:633)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:557)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:150)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:660)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:597)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1468)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1441)
Caused by: java.lang.NullPointerException
    at org.eclipse.emf.edit.command.InitializeCopyCommand.copyAttributes(InitializeCopyCommand.java:136)
    at org.eclipse.emf.edit.command.InitializeCopyCommand.doExecute(InitializeCopyCommand.java:114)
    at org.mdmi.provider.BagItemProvider$1.doExecute(BagItemProvider.java:228)
    at org.eclipse.emf.edit.command.AbstractOverrideableCommand.execute(AbstractOverrideableCommand.java:125)
    at org.eclipse.emf.edit.command.CopyToClipboardCommand.doExecute(CopyToClipboardCommand.java:108)
    at org.eclipse.emf.edit.command.AbstractOverrideableCommand.execute(AbstractOverrideableCommand.java:125)
    at org.eclipse.emf.common.command.BasicCommandStack.execute(BasicCommandStack.java:78)
    ... 31 more

Код: 

@Override
    protected Command createCopyCommand(EditingDomain domain, EObject owner, Helper helper) {

        InitializeCopyCommand initializeCopyCommand = new InitializeCopyCommand(domain, owner, helper) {
            @Override
            public void doExecute() {
                // TODO Auto-generated method stub
                super.doExecute();
            }

            @Override
            public boolean doCanExecute() {
                // TODO Auto-generated method stub
                return true;
            }
        };

        return initializeCopyCommand;
    }

Я не понимаю, что можно сделатьчтобы сработала эта команда? Cut, Paste и DragAndDropCommand отлично работают, но почему не работает команда копирования?

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