Implement multi-objective external evaluation problem

[abeham]

Feature requested on the mailinglist.

This ticket must be released after #2507.

[pfleck]

r13180

• ProtoBuff QualityMessages
  • Changed the QualityMessage to be able to be used for single- and multi-objective problems.
  • The new SingleObjectiveQualityMessage and MultiObjectiveQualityMessage now "inherits" from QualityMessages to be able to be used in a polymorph manner.
  • This is done via protobuf's nested extensions (see ​http://www.indelible.org/ink/protobuf-polymorphism/).
• EvaluationCache
  • The EvaluationCache now now stores the QualityMessage instead of a single double. This way the cache can be used for single- and multi-objective problems and additionally opens the possibility to extend the quality message with any data. (previously extended data was lost when the cache was persisted and loaded again)
  • When deserializing an older version of the cache a new single objective quality message is created from the double value. This way, no compatibility is broken and version must not be incremented.
• Adapted the ExternalEvaluationProblem to the changes of the EvaluationCache and the QualityMessage.
• Added a MultiObjectiveExternalEvaluationProblem on basis of the ExternalEvaluationProblem and added a IExternalEvaluationProblem interface.

[pfleck]

r13183

• Added a SupportScript for the MultiObjectiveExternalEvaluationProblem.
• Extracted code from the SingleObjectiveOptimizationSupportScript into the OptimizationSupportScript to reuse code for the MultiObjectiveOptimizationSupportScript.

[pfleck]

r13203 Made CacheEntry thread-safe. Renamed the persistence properties for more clarity.

[jkarder]

r13212: sealed MultiObjectiveProblemDefinitionScript

[abeham]

I am at VA today and moving to Karlsruhe right afterwards. I don't have any time until Friday to do this. But I think this is important and was requested on the mailinglist also. Maybe you can review it?

[ascheibe]

Ok, I will have a look at it.

[ascheibe]

Reviewed changes:

• Because there is now a MultiObjectiveExternalEvaluationProblem, there should also be a SingleObjectiveExternalEvaluationProblem. Please change the item names to
  • External Evaluation Problem (single-objective)
  • External Evaluation Problem (multi-objective)
• In the constructor of MultiObjectiveExternalEvaluationProblem is a line which is commented out. Please comment it in or remove it.
• In CompiledSingleObjectiveOptimizationSupport/CompiledMultiObjectiveOptimizationSupport fix commented out code

[pfleck]

r13257

• Adapted ItemName from ExternalEvaluationProblem and MultiObjectiveExternalEvaluationProblem.
• Removed/Fixed the support script code in from the comments.

[ascheibe]

Thanks!

[ascheibe]

r13259 merged r13180,r13183,r13203,r13212,r13257 into stable