Android serialization problems

[AnnaDKr]

Hi, while using version 2.57 I found that Class object and Timestamp object serialization does not work on Android runtime. Tested on Android 7-12.

Sample class that I want to serialize looks like:

public class SomeClassToSerialize implements Serializable {

    private Class type;

    public SomeClassToSerialize(Class type) {
        this.type = type;
    }
}

And a test case:

SomeClassToSerialize testObject = new SomeClassToSerialize(Object.class);
FSTConfiguration fstConfiguration = FSTConfiguration.createAndroidDefaultConfiguration();
SomeClassToSerialize copy = fstConfiguration.deepCopy(testObject);

It's working when I run it as a test, but in Android app it throws an exception:

2022-02-16 14:47:20.448 13606-13606/eu.eleader.psx.debug E/PsxLog: eleader: Can not make a java.lang.Class constructor accessible
    java.lang.SecurityException: Can not make a java.lang.Class constructor accessible
        at java.lang.reflect.AccessibleObject.setAccessible0(AccessibleObject.java:150)
        at java.lang.reflect.AccessibleObject.setAccessible(AccessibleObject.java:132)
        at org.nustaq.serialization.FSTObjenesisInstantiator.findConstructorForExternalize(FSTObjenesisInstantiator.java:59)
        at org.nustaq.serialization.FSTObjenesisInstantiator.findConstructorForSerializable(FSTObjenesisInstantiator.java:72)
        at org.nustaq.serialization.FSTClazzInfo.<init>(FSTClazzInfo.java:137)
        at org.nustaq.serialization.FSTClazzInfoRegistry.getCLInfo(FSTClazzInfoRegistry.java:129)
        at org.nustaq.serialization.FSTObjectOutput.getFstClazzInfo(FSTObjectOutput.java:534)
        at org.nustaq.serialization.FSTObjectOutput.writeObjectWithContext(FSTObjectOutput.java:416)
        at org.nustaq.serialization.FSTObjectOutput.writeObjectWithContext(FSTObjectOutput.java:369)
        at org.nustaq.serialization.FSTObjectOutput.writeObjectFields(FSTObjectOutput.java:664)
        at org.nustaq.serialization.FSTObjectOutput.defaultWriteObject(FSTObjectOutput.java:546)
        at org.nustaq.serialization.FSTObjectOutput.writeObjectWithContext(FSTObjectOutput.java:458)
        at org.nustaq.serialization.FSTObjectOutput.writeObjectInternal(FSTObjectOutput.java:327)
        at org.nustaq.serialization.FSTObjectOutput.writeObject(FSTObjectOutput.java:294)
        at org.nustaq.serialization.FSTObjectOutput.writeObject(FSTObjectOutput.java:204)
        at org.nustaq.serialization.FSTConfiguration.asByteArray(FSTConfiguration.java:1182)
        at org.nustaq.serialization.FSTConfiguration.deepCopy(FSTConfiguration.java:1036)

Second case:

import java.io.Serializable;
import java.sql.Timestamp;
		
public class SomeClassToSerializeWithTimestamp implements Serializable {

    private Timestamp type;

    public SomeClassToSerializeWithTimestamp(Timestamp type) {
        this.type = type;
    }
}	

SomeClassToSerializeWithTimestamp testObject = new SomeClassToSerializeWithTimestamp(new Timestamp(1645097693462L));
FSTConfiguration fstConfiguration = FSTConfiguration.createAndroidDefaultConfiguration();
SomeClassToSerializeWithTimestamp copy = fstConfiguration.deepCopy(testObject);

This time app threw exception:

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object java.lang.reflect.Field.get(java.lang.Object)' on a null object reference
     at org.nustaq.serialization.FSTClazzInfo$FSTFieldInfo.getObjectValue(FSTClazzInfo.java:873)
     at org.nustaq.serialization.FSTObjectOutput.writeObjectFields(FSTObjectOutput.java:660)
     at org.nustaq.serialization.FSTObjectOutput.writeObjectCompatibleRecursive(FSTObjectOutput.java:576)
     at org.nustaq.serialization.FSTObjectOutput.writeObjectCompatible(FSTObjectOutput.java:554)
     at org.nustaq.serialization.FSTObjectOutput.writeObjectWithContext(FSTObjectOutput.java:450)
     at org.nustaq.serialization.FSTObjectOutput.writeObjectWithContext(FSTObjectOutput.java:369)
     at org.nustaq.serialization.FSTObjectOutput.writeObjectFields(FSTObjectOutput.java:664)
     at org.nustaq.serialization.FSTObjectOutput.defaultWriteObject(FSTObjectOutput.java:546)
     at org.nustaq.serialization.FSTObjectOutput.writeObjectWithContext(FSTObjectOutput.java:458)
     at org.nustaq.serialization.FSTObjectOutput.writeObjectInternal(FSTObjectOutput.java:327)
     at org.nustaq.serialization.FSTObjectOutput.writeObject(FSTObjectOutput.java:294)
     at org.nustaq.serialization.FSTObjectOutput.writeObject(FSTObjectOutput.java:204)
     at org.nustaq.serialization.FSTConfiguration.asByteArray(FSTConfiguration.java:1182)
     at org.nustaq.serialization.FSTConfiguration.deepCopy(FSTConfiguration.java:1036)	

[bigsinger]

me too

[bigsinger]

java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object java.lang.reflect.Field.get(java.lang.Object)' on a null object reference
at org.nustaq.serialization.FSTClazzInfo$FSTFieldInfo.getObjectValue(FSTClazzInfo.java:873)
at org.nustaq.serialization.FSTObjectOutput.writeObjectFields(FSTObjectOutput.java:660)
at org.nustaq.serialization.FSTObjectOutput$3.defaultWriteObject(FSTObjectOutput.java:916)
at java.io.File.writeObject(File.java:2138)
at java.lang.reflect.Method.invoke(Native Method)
at org.nustaq.serialization.FSTObjectOutput.writeObjectCompatibleRecursive(FSTObjectOutput.java:566)
at org.nustaq.serialization.FSTObjectOutput.writeObjectCompatible(FSTObjectOutput.java:554)
at org.nustaq.serialization.FSTObjectOutput.writeObjectWithContext(FSTObjectOutput.java:450)
at org.nustaq.serialization.FSTObjectOutput.writeObjectInternal(FSTObjectOutput.java:327)
at org.nustaq.serialization.FSTObjectOutput.writeObject(FSTObjectOutput.java:294)
at org.nustaq.serialization.FSTObjectOutput.writeObject(FSTObjectOutput.java:204)
at org.nustaq.serialization.FSTConfiguration.asByteArray(FSTConfiguration.java:1182)
at com.xsl.app.MainActivity.onCreate(MainActivity.java:48)
at android.app.Activity.performCreate(Activity.java:8488)
at android.app.Activity.performCreate(Activity.java:8461)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1343)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4602)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4842)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:113)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:149)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:103)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2928)
at android.os.Handler.dispatchMessage(Handler.java:117)
at android.os.Looper.loopOnce(Looper.java:205)
at android.os.Looper.loop(Looper.java:293)
at android.app.ActivityThread.main(ActivityThread.java:9596)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:586)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1204)

[simonpoole]

I suspect the later issue is the same as what I mention here #288