Support serializable objects
----------------------------
Key: SLING-1126
URL: https://issues.apache.org/jira/browse/SLING-1126
Project: Sling
Issue Type: Improvement
Components: JCR
Affects Versions: JCR Resource 2.0.4
Reporter: Carsten Ziegeler
Assignee: Carsten Ziegeler
Fix For: JCR Resource 2.0.6
The JcrPropertyMap and JcrModifiablePropertyMap only support reading and
writing the object types supported by JCR. It is currently not possible to
store any serializable objects.
Supporting the writing of serializable objects is easy, we just have to enhance
the JcrModifiablePropertyMap to write the serialized object into the repository
(through an ObjectOutputStream).
Reading a serialized object is more tricky as the implementation does not know
in advance, if the input stream contains a serialized object or some arbitrary
data.
The check for this is a little bit expensive as it would require to first try
to read the data through an ObjectInputStream and if that success we have the
serialized object. If this is not successful, a new input stream has to be used.
As I think that this is a very valuable feature (for example the Sling eventing
has a use case for this), we should do this special check only under certain
circumstances, for example
a) if ValueMap.get(KEY) is invoked and the property is an input stream
or
b) if ValueMap.get(KEY, Object.class) is used
Any other ideas, suggestions?
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