How can I deserialize data with Perl serialized with Java?

[Mr P]

Our Java team (you know the language- the one that needs 3000 lines
and 25 classes to say HELLO WORLD), using tomcat, has stored some page
results into a MYSQL LARGE BLOB, serialized. I can fetch the blob
into a Perl scalar. But attempts to deserialize it have been
unsucessful.

After researching Perl Data::Serializer , I sent the JAVA the 8 types
of supported serialized data. The Java guy said he had no idea which
would apply. I've been trying all of them with either errors, or no
data returned. I also tried deserialize_raw() which results in:

Use of inherited AUTOLOAD for non-method
Data::Serializer:ata:umper::SCALAR() is deprecated at (eval 8)
[blib/lib/Data/Serializer/Data/Dumper.pm (autosplit into blib/lib/auto/
Data/Serializer/Data/Dumper/deserialize.al):98] line 1.
Data::Serializer error: Can't locate auto/Data/Serializer/Data/Dumper/
SCALAR.al in @INC

Googling for SCALAR.al produces nada. (What *is* a .al file anyhow?)

Anyhow, what looked simple has basically turned into a PITA. Advice is
appreciated and most certain NOT deprecated !

Gracias and Happy Friday,
MP

 

[Mr P]

Our Java team (you know the language- the one that needs 3000 lines
and 25 classes to say HELLO WORLD), using tomcat, has stored some page
results into a MYSQL LARGE BLOB,serialized. I can fetch the blob
into a Perl scalar. But attempts to deserialize it have been
unsucessful.

After researching Perl Data::Serializer , I sent the JAVA the 8 types
of supportedserializeddata. The Java guy said he had no idea which
would apply. I've been trying all of them with either errors, or no
data returned. I also tried deserialize_raw() which results in:

Use of inherited AUTOLOAD for non-method
Data::Serializer:ata:umper::SCALAR() is deprecated at (eval 8)
[blib/lib/Data/Serializer/Data/Dumper.pm (autosplit into blib/lib/auto/
Data/Serializer/Data/Dumper/deserialize.al):98] line 1.
Data::Serializer error: Can't locate auto/Data/Serializer/Data/Dumper/
SCALAR.al in @INC

Googling for SCALAR.al produces nada. (What *is* a .al file anyhow?)

Anyhow, what looked simple has basically turned into a PITA. Advice is
appreciated and most certain NOT deprecated !

Gracias and Happy Friday,
MP

.... still ciphering on this. I did find a Perl module that sorta
looked like it would do what I need: Java::IO::ObjectInputStream ,
but it's not in CPAN.

Could unpack be helpful with this?

MP

 

[A. Sinan Unur]

I haven't written Java in a long time. However, once reasonable solution,
it seems to me, would be to make use of the Java classes themselves to de-
serialize the data.

To that end, http://search.cpan.org/~rusekd/Java-Import-0.03/ or
http://search.cpan.org/~patl/Inline-Java-0.52/Java.pod might help.

Sinan

 

[Mr P]

... stored some

I haven't written Java in a long time. However, once reasonable solution,
it seems to me, would be to make use of the Java classes themselves to de-
serialize the data.

To that end,http://search.cpan.org/~rusekd/Java...cpan.org/~patl/Inline-Java-0.52/Java.podmight help.

Sinan

Sinan:

Thank-You for this suggestion, seeking the README's now. This seems
for more esoteric than I'd anticipated.


MP