Autogeneration error in python API binding with multiple parents

[Hampapur Ajay]

In the config schema files (vnc_cfg.xsd, alarm.xsd etc.) if there is a situation like below:

Obj-Type-A child of Obj-Type-1
Obj-Type-A child of Obj-Type-2
Obj-Type-B child of Obj-Type-A

Then generation of constructor of class ObjTypeB in resource_common.py encounters an error at getDefaultFQName() with traceback:

Traceback (most recent call last):

  File "tools/generateds/generateDS.py", line 5694, in <module>

    main()

  File "tools/generateds/generateDS.py", line 5683, in main

    pgenr.parseAndGenerate()

  File "tools/generateds/generateDS.py", line 1138, in parseAndGenerate

    self._Generator.generate(root, infile, self.outFilename)

  File "/root/SB-6Jan/tools/generateds/ccmap.py", line 195, in generate

    self._GenerateFrontendClassDefinitions(root)

  File "/root/SB-6Jan/tools/generateds/ccmap.py", line 159, in _GenerateFrontendClassDefinitions

    apigen.Generate(self._Parser.outFilename)

  File "/root/SB-6Jan/tools/generateds/ifmap_frontend.py", line 51, in Generate

    self._generate_common_classes(gen_filepath_pfx)

  File "/root/SB-6Jan/tools/generateds/ifmap_frontend.py", line 460, in _generate_common_classes

    parent_default_fq_name = parent_ident.getDefaultFQName()

  File "/root/SB-6Jan/tools/generateds/ifmap_model.py", line 119, in getDefaultFQName

    raise Exception('parent_type should be specified')

Exception: parent_type should be specified

scons: *** [build/debug/config/api-server/vnc_cfg_api_server/gen/__init__.py] Error 1

scons: building terminated because of errors.

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/28240
Submitter: Hampapur Ajay (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/28240
Committed: http://github.org/Juniper/contrail-generateDS/commit/ba6201374be8c70059cac37aa913c1979c90bdf0
Submitter: Zuul (<email address hidden>)
Branch: master

commit ba6201374be8c70059cac37aa913c1979c90bdf0
Author: Hampapur Ajay <email address hidden>
Date: Fri Jan 27 10:41:00 2017 -0800

When parent-type could have multiple parent-types of its own,
insist on parent_obj or parent_type+fq_name in the constructor
for python binding class.

Change-Id: I613ad19b17de175c8b57855cb835a9a2bdabd32e
Closes-Bug: 1659920