0001657: Hessian 3.0.20 can't handle Singleton(Map)s

Viewing Issue Simple Details [ Jump to Notes ]

[ View Advanced ] [ Issue History ] [ Print ]

Category

Severity

Reproducibility

Date Submitted

Last Update

0001657

[Resin]

major

always

03-28-07 02:12

06-05-07 11:44

Reporter

dbrakhane

View Status

public

Assigned To

ferg

Priority

normal

Resolution

fixed

Status

closed

Product Version

3.0.20

Summary

0001657: Hessian 3.0.20 can't handle Singleton(Map)s

Description

I recently tried upgrading from (the Java) Hessianlib 3.0.8 to 3.0.20 because the latter supports enums. However, it seems like 3.0.20 (in contrast to 3.0.8) can't handle Maps that are an instance of Collections.singletonMap:

Caused by: com.caucho.hessian.io.IOExceptionWrapper: java.lang.InstantiationException: java.util.Collections$SingletonMap
        at com.caucho.hessian.io.MapDeserializer.readMap(MapDeserializer.java)
        at com.caucho.hessian.io.HessianInput.readObject(HessianInput.java)
        at com.caucho.hessian.io.HessianInput.readReply(HessianInput.java:285)
        at com.caucho.hessian.client.HessianProxy.invoke(HessianProxy.java)

The problem seems to be that MapDeserializer - as long as the class is not Map.class or SortedMap.class, tries to instanciate a new object of the given type. However, Collections$SingletonMap cannot be instanciated.

I think, modifiying MapDeserializer (and ListDeserializer) so that it, when it cannot instanciate the original type, instanciates an object of HashMap (or ArrayList, respectively) instead, should fix the problem

Additional Information

Attached Files

Relationships

Notes
(0001903) dbrakhane 05-10-07 06:29	Any thoughts on this one? This bug is keeping me from upgrading and using enums, respectively

(0002009) ferg 06-05-07 11:44	hessian/331a

Issue History
Date Modified	Username	Field	Change
03-28-07 02:12	dbrakhane	New Issue
03-28-07 02:12	dbrakhane	Issue Monitored: dbrakhane
05-10-07 06:29	dbrakhane	Note Added: 0001903
06-05-07 11:44	ferg	Note Added: 0002009
06-05-07 11:44	ferg	Assigned To	=> ferg
06-05-07 11:44	ferg	Status	new => closed
06-05-07 11:44	ferg	Resolution	open => fixed
06-05-07 11:44	ferg	Fixed in Version	=> 3.1.2

Mantis 1.0.0rc3[^]

32 total queries executed.
27 unique queries executed.