0003981: Java Enums Deserialization Problem

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Category

Severity

Reproducibility

Date Submitted

Last Update

0003981

[Hessian]

major

always

04-06-10 02:40

01-12-12 03:25

Reporter

halid

View Status

public

Assigned To

Priority

normal

Resolution

open

Status

new

Product Version

4.0.3

Summary

0003981: Java Enums Deserialization Problem

Description

We are using Hessian 4.0.3 as HTTP-Wrapper for our RMI-Services. Since we expanded one of our main services with a new parameter that contains EnumSet and Enums, we get deserialization problems on the client site.
I analyzed the problem comparing reference-arrays on the serializer and deserializer side, and could see that the Hessian-Deserializer for EnumSets creates one more reference in his reference-array. This difference leads to deserialization problems on all following attributes that are handled as references because of changed index of reference.
I attached a small Java-Program that reproduces this problem.

Additional Information

Java Runtime: Sun jdk1.5.0_16
OS: Windows XP
Hessian: 4.0.3

Attached Files

SerializationHessTest.java [^] (1,975 bytes) 04-06-10 02:40

Relationships

Notes
(0005673) sdabek 01-12-12 03:25	It seems the Hessian deserializer also tries to deserialize Enum types as Enums. EnumSets are serialized through a SerializationProxy, which contains an array of its Enums and an "elementType" attribute storing their type. Now the Hessian deserializer tries to deserialze "elementType" with the EnumDeserializer instead of the ClassDeserializer, which obviously fails. The following fix in SerializerFactory should handle this correctly: Replace: else if (Enum.class.isAssignableFrom(cl)) deserializer = new EnumDeserializer(cl); With: else if (cl.isEnum()) deserializer = new EnumDeserializer(cl);

Issue History
Date Modified	Username	Field	Change
04-06-10 02:40	halid	New Issue
04-06-10 02:40	halid	File Added: SerializationHessTest.java
09-02-10 14:17	torge	Issue Monitored: torge
01-12-12 03:25	sdabek	Note Added: 0005673
01-12-12 03:25	sdabek	Issue Monitored: sdabek
02-15-12 09:29	babasmith	Issue Monitored: babasmith

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