为什么com.codename1.io.Util.writeObject在UWP上引发异常，但在模拟器上没有

Question

我有一个外部化函数，它在Android，iOS和模拟器上运行良好，但是在我尝试启用的UWP版本上运行它时失败并出现异常。

谁能告诉我这是否正常，我只是不知道在 UWP 上外部化，或者这是否是我们应该作为一个问题打开的错误？

导致它的代码是：

@Override
public void externalize(DataOutputStream out) throws IOException {
    Util.writeUTF(this.modSetVersion, out);
    Util.writeObject(getObjectsArrayFromLinkedHashMap(this.modules),out); //**Exception on this line
    Util.writeObject(getObjectsArrayFromLinkedHashMap(this.categories),out);
    Util.writeObject(this.learnables,out);
}
//Generates an array of objects from a LinkedHashMap to retain order in externalized file
private Object[] getObjectsArrayFromLinkedHashMap(LinkedHashMap lhm) {
    Set set = lhm.entrySet();
    Iterator iterator = set.iterator();
    Object[] objList = new Object[set.size()];
    int i = 0;
    while(iterator.hasNext()) {
        Map.Entry me = (Map.Entry) iterator.next();
        objList[i++] = me.getValue();
    }
    return objList;
}

(请注意，在异常时间(this.modules(被外部化的数组中的对象被正确声明为可外部化，并包含其他可外部化的对象，但从堆栈跟踪来看，它似乎在失败之前没有进展到这个可外部化对象中的对象(

从 UWP 桌面客户端(Windows 10 企业版(上捕获的日志中的堆栈跟踪：

[EDT] 0:1:15,155 - Exception: java.io.IOException - Object type not supported: [Ljava.lang.Object; value: [Ljava.lang.Object;@e08d4a
   at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)
   at System.Environment.get_StackTrace()
   at UWPApp.IKVMReflectionHelper.getCurrentStackTrace()
   at java.lang.ThrowableHelper.getCurrentStackTrace()
   at java.lang.Throwable..ctor(String message)
   at java.lang.Exception..ctor(String message)
   at java.io.IOException..ctor(String message)
   at com.codename1.io.Util.writeObject(Object o, DataOutputStream out)
   at trainingtoolDataModel.ModuleSet.externalize(DataOutputStream out)
   at com.codename1.io.Util.writeObject(Object o, DataOutputStream out)
   at com.codename1.io.Storage.writeObject(String name, Object o)
   at userclasses.StateMachine.saveModuleSet(ModuleSet modSet)
   at userclasses.StateMachine.successfullyDownloadedAllAuthorizedContent(String retrievedVersion)
   at userclasses.StateMachine.updateContentFromNetwork(Boolean force)
   at userclasses.StateMachine.loadContentFirstTime(Form f)
   at userclasses.StateMachine.onFirstTimeSetupLogin_ContinueButtonAction(Component c, ActionEvent event)
   at generated.StateMachineBase.handleComponentAction(Component c, ActionEvent event)
   at com.codename1.ui.util.UIBuilder.FormListener.actionPerformed(ActionEvent evt)
   at com.codename1.ui.util.EventDispatcher.fireActionEvent(ActionEvent ev)
   at com.codename1.ui.Button.fireActionEvent(Int32 x, Int32 y)
   at com.codename1.ui.Button.released(Int32 x, Int32 y)
   at com.codename1.ui.Button.pointerReleased(Int32 x, Int32 y)
   at com.codename1.ui.Form.pointerReleased(Int32 x, Int32 y)
   at com.codename1.ui.Form.pointerReleased(Int32 x, Int32 y)
   at com.codename1.ui.Component.pointerReleased(Int32[] x, Int32[] y)
   at com.codename1.ui.Display.handleEvent(Int32 offset)
   at com.codename1.ui.Display.edtLoopImpl()
   at com.codename1.ui.Display.invokeAndBlock(Runnable r, Boolean dropEvents)
   at com.codename1.ui.Display.invokeAndBlock(Runnable r)
   at com.codename1.impl.SilverlightImplementation.editString(Component n1, Int32 n2, Int32 n3, String n4, Int32 n5)
   at com.codename1.impl.CodenameOneImplementation.editStringImpl(Component cmp, Int32 maxSize, Int32 constraint, String text, Int32 initiatingKeycode)
   at com.codename1.ui.Display.editString(Component cmp, Int32 maxSize, Int32 constraint, String text, Int32 initiatingKeycode)
   at com.codename1.ui.Display.editString(Component cmp, Int32 maxSize, Int32 constraint, String text)
   at com.codename1.ui.TextArea.editString()
   at com.codename1.ui.TextArea.pointerReleased(Int32 x, Int32 y)
   at com.codename1.ui.TextField.pointerReleased(Int32 x, Int32 y)
   at com.codename1.ui.Form.pointerReleased(Int32 x, Int32 y)
   at com.codename1.ui.Component.pointerReleased(Int32[] x, Int32[] y)
   at com.codename1.ui.Display.handleEvent(Int32 offset)
   at com.codename1.ui.Display.edtLoopImpl()
   at com.codename1.ui.Display.mainEDTLoop()
   at com.codename1.ui.RunnableWrapper.run()
   at com.codename1.impl.CodenameOneThread.run()
   at java.lang.Thread.threadProc2()
   at java.lang.Thread.threadProc()
   at java.lang.Thread.1.Invoke()
   at com.codename1.impl.NativeThreadImpl.<>c__DisplayClass6_0.<init>b__0()
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
   at System.Threading.Tasks.Task.ExecutionContextCallback(Object obj)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot)
   at System.Threading.Tasks.Task.ExecuteEntry(Boolean bPreventDoubleExecution)
   at System.Threading.Tasks.ThreadPoolTaskScheduler.LongRunningThreadWork(Object obj)
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart(Object obj)
Originating from:
Message=Object type not supported: [Ljava.lang.Object; value: [Ljava.lang.Object;@e08d4a
   at com.codename1.io.Util.writeObject(Object o, DataOutputStream out)
   at trainingtoolDataModel.ModuleSet.externalize(DataOutputStream out)
   at com.codename1.io.Util.writeObject(Object o, DataOutputStream out)
   at com.codename1.io.Storage.writeObject(String name, Object o)

Answer 1

异常意味着不支持其中一种对象类型，但很难分辨是哪一种。

我猜这条线有问题：

    objList[i++] = me.getValue();

我假设由于 UWP 上的一些不同行为，您在那里获得不同的对象类型，我建议使用您正在编写的所有对象的类名添加日志记录。