RCP程序“The chosen operation is not enable”对话框

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当RCP程序运行时出现'The chosen operation is not enable'对话框，原因是自定义Handler未正确设置isEnabled和isHandled为true。通过覆盖Handler的这两个方法，可以解决此问题。

现象：RCP程序运行时，跳出“The chosen operation is not enable”对话框

控制台打印异常

org.eclipse.core.commands.NotEnabledException: Trying to execute the disabled command com.cncredit.validator.ui.command.CloseAllValidatorEditor
	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:469)
	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.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:247)
	at com.cncredit.validator.ui.command.ImportValidatorConfigFile.execute(ImportValidatorConfigFile.java:44)
	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.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:247)
	at com.cncredit.validator.ui.view.ValidatorTreeView.openValidatorConfig(ValidatorTreeView.java:256)
	at com.cncredit.validator.ui.view.ValidatorTreeView.access$0(ValidatorTreeView.java:254)
	at com.cncredit.validator.ui.view.ValidatorTreeView$1.widgetSelected(ValidatorTreeView.java:82)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:240)
	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:4165)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at com.cncredit.validator.Application.start(Application.java:21)
	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:344)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
	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:622)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1386)

原因：定义的Handler没有设置isEnabled和isHandled两个标识设为true

解决：只要把你的自定义Handler的这两个方法Override就可以了