如果已经反序列化,则无法使用惰性集合

时间:2013-12-18 13:50:43

标签: android database ormlite foreign-collection

我在我的项目中使用ORM Lite,我有一种情况,其中逐步引入了一个Person对象的意图,它有一个Collection of Email对象,但当我尝试读取这个类似LazyLoad的Collection时( eager = false)下面是模型和用于检索电子邮件集合的代码:

public class Pessoa implements Serializable{

    @DatabaseField(generatedId=true)
    private int id;

        ...

    @ForeignCollectionField(eager=false)
    private Collection<Email> emails;

        ...
}
public class Email implements Serializable{

    @DatabaseField(generatedId=true)
    private int id;

    ...

    @DatabaseField(foreign=true)
    private Pessoa pessoa;

       ...
}

检索集合:

if(getIntent().hasExtra("Pessoa")){
       pessoa = (Pessoa) getIntent().getSerializableExtra("Pessoa");

Iterator<Endereco> iterator = pessoa.getEnderecos().iterator();
while(iterator.hasNext()){
        Endereco end = iterator.next();
        Log.e("ENDERECO",end.getLogradouro());
}

我收到以下错误:

  

12-18 11:48:08.168:E / AndroidRuntime(26028):致命异乎寻常:主要   12-18 11:48:08.168:E / AndroidRuntime(26028):   java.lang.RuntimeException:无法启动活动   ComponentInfo {com.example.pedidosexample / com.example.abertura.CadastroVisualizacao}:   java.lang.IllegalStateException:内部DAO对象为null。懒   如果已经反序列化,则无法使用这些集合。 12-18   11:48:08.168:E / AndroidRuntime(26028):at   android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1970)   12-18 11:48:08.168:E / AndroidRuntime(26028):at   android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1995)   12-18 11:48:08.168:E / AndroidRuntime(26028):at   android.app.ActivityThread.access $ 600(ActivityThread.java:128)12-18   11:48:08.168:E / AndroidRuntime(26028):at   android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1161)   12-18 11:48:08.168:E / AndroidRuntime(26028):at   android.os.Handler.dispatchMessage(Handler.java:99)12-18   11:48:08.168:E / AndroidRuntime(26028):at   android.os.Looper.loop(Looper.java:137)12-18 11:48:08.168:   E / AndroidRuntime(26028):at   android.app.ActivityThread.main(ActivityThread.java:4517)12-18   11:48:08.168:E / AndroidRuntime(26028):at   java.lang.reflect.Method.invokeNative(Native Method)12-18   11:48:08.168:E / AndroidRuntime(26028):at   java.lang.reflect.Method.invoke(Method.java:511)12-18 11:48:08.168:   E / AndroidRuntime(26028):at   com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:993)   12-18 11:48:08.168:E / AndroidRuntime(26028):at   com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760)12-18   11:48:08.168:E / AndroidRuntime(26028):at   dalvik.system.NativeStart.main(Native Method)12-18 11:48:08.168:   E / AndroidRuntime(26028):引起:java.lang.IllegalStateException:   内部DAO对象为null。如果它们不能使用惰性集合   已被反序列化。 12-18 11:48:08.168:E / AndroidRuntime(26028):     在   com.j256.ormlite.dao.LazyForeignCollection.seperateIteratorThrow(LazyForeignCollection.java:310)   12-18 11:48:08.168:E / AndroidRuntime(26028):at   com.j256.ormlite.dao.LazyForeignCollection.iteratorThrow(LazyForeignCollection.java:71)   12-18 11:48:08.168:E / AndroidRuntime(26028):at   com.j256.ormlite.dao.LazyForeignCollection.closeableIterator(LazyForeignCollection.java:60)   12-18 11:48:08.168:E / AndroidRuntime(26028):at   com.j256.ormlite.dao.LazyForeignCollection.iterator(LazyForeignCollection.java:47)   12-18 11:48:08.168:E / AndroidRuntime(26028):at   com.j256.ormlite.dao.LazyForeignCollection.iterator(LazyForeignCollection.java:28)   12-18 11:48:08.168:E / AndroidRuntime(26028):at   com.example.abertura.CadastroVisualizacao.preencheCampos(CadastroVisualizacao.java:85)   12-18 11:48:08.168:E / AndroidRuntime(26028):at   com.example.abertura.CadastroVisualizacao.onCreate(CadastroVisualizacao.java:53)   12-18 11:48:08.168:E / AndroidRuntime(26028):at   android.app.Activity.performCreate(Activity.java:4470)12-18   11:48:08.168:E / AndroidRuntime(26028):at   android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1053)   12-18 11:48:08.168:E / AndroidRuntime(26028):at   android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1934)   12-18 11:48:08.168:E / AndroidRuntime(26028):... 11 more

错误清楚地说明问题是什么,但它有另一种方法将Person对象传递给另一个intent并且与lite ORM一起使用?

谢谢!

1 个答案:

答案 0 :(得分:-2)

@ForeignCollectionField(eager = true)