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https://issues.apache.org/jira/browse/QPID-7601?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex Rudyy resolved QPID-7601.
------------------------------
    Resolution: Fixed

> [Java Broker] Allow annotations to define ManagedAttributeValueTypes as 
> abstract, some methods as derived
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: QPID-7601
>                 URL: https://issues.apache.org/jira/browse/QPID-7601
>             Project: Qpid
>          Issue Type: Improvement
>          Components: Java Broker
>            Reporter: Rob Godfrey
>            Assignee: Rob Godfrey
>             Fix For: qpid-java-7.0
>
>
> ManagedAttributeValueTypes may form a type hierarchy, however there is no way 
> for a value to be resolved to a particular instance class.
> A type can be marked as abstract meaning that it cannot itself be 
> instantiated from an input value (i.e. it cannot be used as a managed 
> attribute, or the input to an operation).  An abstract type can be used as an 
> output value (e.g. as a return value from an operation, or as a derived 
> attribute).  
> Further we should allow ManagedAttributeTypes to themselves have derived 
> attributes.  These attributes should be returned from query methods, but not 
> persisted, and values for these attributes should be ignored when present in 
> input data.



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