objectbox / objectbox/objectbox-java

Crash on loading serialized object from intent in To-Many case

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bug
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Java
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Description

hi, the issue is, I have a Receipt class with an arraylist of items. so I used ToMany relation and changed arraylist to To-Many and in ReceiptItem class created a new field with To-One relationship. Its working fine and saving in 2 tables properly.

@Entity
public class Receipt implements Serializable {
    public ToMany<ReceiptItem> receipt_items;
   .... 
}
@Entity
public class ReceiptItem implements Serializable {
    public ToOne<Receipt> receiptToOne;
}

I am sending my receipt object from one activity to another activity by serialization and getting in another activity.
receipt = (Receipt) (intent.getSerializableExtra("key_receiptobject"));

No issues and this is working fine.

Now for proper One-To-Many relationship I added, @Backlink annotation.

@Entity
public class Receipt implements Serializable {
    @Backlink
    public ToMany<ReceiptItem> receipt_items;
   .... 
}

and my app crashes on this line,
receipt = (Receipt) (intent.getSerializableExtra("key_receiptobject"));

Can you please help me to resolve this.

Issue Basics

  • ObjectBox version : 1.4.0
  • Reproducibility: always
Logs & stackstraces

E/UncaughtException: java.lang.RuntimeException: Unable to start activity ComponentInfo{}: java.lang.RuntimeException: Parcelable encountered ClassNotFoundException reading a Serializable object (name = abc.sales.entity.Receipt)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2429)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2493)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1357)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5459)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
Caused by: java.lang.RuntimeException: Parcelable encountered ClassNotFoundException reading a Serializable object (name = abc.sales.entity.Receipt)
at android.os.Parcel.readSerializable(Parcel.java:2512)
at android.os.Parcel.readValue(Parcel.java:2315)
at android.os.Parcel.readArrayMapInternal(Parcel.java:2614)
at android.os.BaseBundle.unparcel(BaseBundle.java:221)
at android.os.BaseBundle.getSerializable(BaseBundle.java:992)
at android.os.Bundle.getSerializable(Bundle.java:880)
at android.content.Intent.getSerializableExtra(Intent.java:5468)
at abc.sales.Activities.sale.ITPrintReceiptActivity.onCreate(ITPrintReceiptActivity.java:129)
at android.app.Activity.performCreate(Activity.java:6259)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1130)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2382)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2493) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1357) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5459) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
Caused by: java.lang.ClassNotFoundException: long
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:324)
at android.os.Parcel$2.resolveClass(Parcel.java:2498)
at java.io.ObjectInputStream.readNewClassDesc(ObjectInputStream.java:1641)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:657)
at java.io.ObjectInputStream.readNewClass(ObjectInputStream.java:1512)
at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:755)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1983)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1940)
at java.io.ObjectInputStream.readFieldValues(ObjectInputStream.java:1113)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:454)
at java.io.ObjectInputStream.readObjectForClass(ObjectInputStream.java:1345)
at java.io.ObjectInputStream.readHierarchy(ObjectInputStream.java:1242)
at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1835)
at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:761)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1983)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1940)
at java.io.ObjectInputStream.readFieldValues(ObjectInputStream.java:1113)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:454)
at java.io.ObjectInputStream.readObjectForClass(ObjectInputStream.java:1345)
at java.io.ObjectInputStream.readHierarchy(ObjectInputStream.java:1242)
at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1835)
at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:761)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1983)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1940)
at java.io.ObjectInputStream.readFieldValues(ObjectInputStream.java:1113)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:454)
at java.io.ObjectInputStream.readObjectForClass(ObjectInputStream.java:1345)
at java.io.ObjectInputStream.readHierarchy(ObjectInputStream.java:1242)
at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1835)
at java.io.Obje
01-19 22:58:22.752 7470-7488/abc.sales D/FA: Logging event (FE): _ae, Bundle[{_o=crash, timestamp=1516382902748, fatal=1}]
01-19 22:58:23.008 7470-7470/abc.sales E/AndroidRuntime: FATAL EXCEPTION: main
Process: abc.sales, PID: 7470
java.lang.RuntimeException: Unable to start activity ComponentInfo{abc.sales/abc.sales.Activities.sale.ITPrintReceiptActivity}: java.lang.RuntimeException: Parcelable encountered ClassNotFoundException reading a Serializable object (name = abc.sales.entity.Receipt)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2429)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2493)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1357)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5459)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
Caused by: java.lang.RuntimeException: Parcelable encountered ClassNotFoundException reading a Serializable object (name = abc.sales.entity.Receipt)
at android.os.Parcel.readSerializable(Parcel.java:2512)
at android.os.Parcel.readValue(Parcel.java:2315)
at android.os.Parcel.readArrayMapInternal(Parcel.java:2614)
at android.os.BaseBundle.unparcel(BaseBundle.java:221)
at android.os.BaseBundle.getSerializable(BaseBundle.java:992)
at android.os.Bundle.getSerializable(Bundle.java:880)
at android.content.Intent.getSerializableExtra(Intent.java:5468)
at abc.sales.Activities.sale.ITPrintReceiptActivity.onCreate(ITPrintReceiptActivity.java:129)
at android.app.Activity.performCreate(Activity.java:6259)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1130)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2382)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2493) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1357) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5459) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
Caused by: java.lang.ClassNotFoundException: long
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:324)
at android.os.Parcel$2.resolveClass(Parcel.java:2498)
at java.io.ObjectInputStream.readNewClassDesc(ObjectInputStream.java:1641)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:657)
at java.io.ObjectInputStream.readNewClass(ObjectInputStream.java:1512)
at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:755)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1983)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1940)
at java.io.ObjectInputStream.readFieldValues(ObjectInputStream.java:1113)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:454)
at java.io.ObjectInputStream.readObjectForClass(ObjectInputStream.java:1345)
at java.io.ObjectInputStream.readHierarchy(ObjectInputStream.java:1242)
at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1835)
at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:761)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1983)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1940)
at java.io.ObjectInputStream.readFieldValues(ObjectInputStream.java:1113)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:454)
at java.io.ObjectInputStream.readObjectForClass(ObjectInputStream.java:1345)
at java.io.ObjectInputStream.readHierarchy(ObjectInputStream.java:1242)
at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:1835)
at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:761)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1983)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:1940)
at java.io.ObjectInputStream.readFieldValues(ObjectInputStream.java:1113)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:454)
at java.io.ObjectInputStream.readObjectForClass(ObjectInputStream.java:1345)
at java.io.ObjectInputStream.readHierarchy(ObjectInputStream.java:1242)
at java.io.ObjectInputStream.readN

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at ITPrintReceiptActivity.java:129 and inspect the Receipt and ReceiptItem declarations shown in the issue, comparing serialization before and after adding @Backlink. Reproduce the intent deserialization failure with ObjectBox 1.4.0 and the provided stack trace. Done means the activity can load the serialized Receipt with the relationship present without a ClassNotFoundException.

Written by the indexing model from the issue text.

Assessment

Tech stack
android, java
Domain
database, mobile
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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