I am looking for feedback on the patches provided as part of QPID-1786
[1]. As a background, these are patches to the python and java code base
which were started by Ted Ross and Rafael Schloming. They add a Java
Agent which has an API similar to the CPP agent. In addition, it
introduces the notion of "non-managed objects" which are structs which
can be sent across the wire. These structs are basically managed objects
without methods. The marshalling logic is using annotations and is
heavily based on using JAXB.
The muppet scripts generates a schema which looks like the attached
file. I have a couple of open questions which I would like to get folks
input on based on this schema:
1) Denoting managed types versus not. In the current schema, the only
way to tell that a type is managed is to look for the existence of
method elements. But, this is not full proof, since a managed object can
have no behaviour. Should the type (managed or not) be called out in the
schema?
2) Type inheritance. In this example, a Pikelet is a subclass of Crumpet
. Said another way, the Pikelet type extends the Crumpet type. There
is no notion of this in the schema. Should there be?
3) Enumerations: There is no way to list enumerated strings in the
schema. There are range checks, but no valid value lists.
Comments on these questions and any other comments on the code would be
appreciated.
Thanks.
-- bk
[1] https://issues.apache.org/jira/browse/QPID-1786
<schema package='org.apache.test'>
<class name='Muppet'>
<property name='something' type='long-string' access='ReadOnly'
optional='False' />
<method name='doSomething'>
<arg name='arg0' dir='I' type='long-string' />
</method>
<method name='returnSomething'>
<arg name='result' dir='O' type='long-string' />
</method>
<method name='gimmieCrumpet'>
<arg name='arg0' dir='I' type='long-string' />
<arg name='arg1' dir='I' type='int32' />
<arg name='arg2' dir='I' type='float' />
<arg name='arg3' dir='I' type='field-table' />
<arg name='result' dir='O' type='object'
refClass='Crumpet'/>
</method>
<method name='gimmieCrumpet2'>
<arg name='result' dir='O' type='object'
refClass='Crumpet'/>
</method>
<method name='gimmeLotsOfCrumpets'>
<arg name='result' dir='O' type='list' />
</method>
<method name='divideByZero'>
<arg name='result' dir='O' type='int32' />
</method>
<method name='takeCrumpet'>
<arg name='arg0' dir='I' type='object'
refClass='Crumpet'/>
<arg name='result' dir='O' type='object'
refClass='Crumpet'/>
</method>
<method name='takeSomething'>
<arg name='arg0' dir='I' type='object'
refClass='Object'/>
<arg name='result' dir='O' type='object'
refClass='Object'/>
</method>
</class>
<class name='Pikelet'>
<property name='shape' type='long-string' access='ReadWrite'
optional='False' />
<property name='ingredients' type='list' access='ReadWrite'
optional='False' />
<property name='foo' type='long-string' access='ReadWrite'
optional='False' />
<property name='bar' type='long-string' access='ReadWrite'
optional='False' />
</class>
<class name='Crumpet'>
<property name='ingredients' type='list' access='ReadWrite'
optional='False' />
<property name='foo' type='long-string' access='ReadWrite'
optional='False' />
<property name='bar' type='long-string' access='ReadWrite'
optional='False' />
</class>
</schema>
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