[jboss-jira] [JBoss JIRA] (DROOLS-1082) Querying for objects before any have been inserted prevents Class Aware Object Store from working properly

[James Elford (JIRA)]

James Elford created DROOLS-1082:
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             Summary: Querying for objects before any have been inserted prevents Class Aware Object Store from working properly
                 Key: DROOLS-1082
                 URL: https://issues.jboss.org/browse/DROOLS-1082
             Project: Drools
          Issue Type: Bug
    Affects Versions: 6.3.0.Final
            Reporter: James Elford
            Assignee: Mark Proctor


In the presence of a class heirarchy, the {{ClassAwareObjectStore}} doesn't properly manage the relationships between {{SingleClassStores}} - specifically, it can become permanently corrupt if the following order of events occurs:

* Insert object of type {{BaseClass}}
* Query for objects of type {{SubClass}}
** Note that it's important this query is fully evaluated (e.g. copy it into a list)
* Insert object of type {{SubClass}}

Subsequent queries for objects of type {{BaseClass}} will _not_ return objects of type {{SubClass}}. If the intervening query for {{SubClass}} is left out, they would.

The problem's in {{ClassAwareObjectStore#getOrCreateConcreteClass}}, where it tries to concretize an existing (non-concrete) store. It should go through the same "linking" process that gets done in the {{existingStore == null}} case (and half of which is done already in {{#getOrCreateClassStore}}).





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