[jboss-jira] [JBoss JIRA] (DROOLS-31) RowAdapter should not throw Exception when Object not found

[Ryan Nideffer (JIRA)]

Ryan Nideffer created DROOLS-31:
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             Summary: RowAdapter should not throw Exception when Object not found
                 Key: DROOLS-31
                 URL: https://issues.jboss.org/browse/DROOLS-31
             Project: Drools
          Issue Type: Enhancement
      Security Level: Public (Everyone can see)
    Affects Versions: 5.5
            Reporter: Ryan Nideffer
            Assignee: Mark Proctor


RowAdapter throws an undocumented, unchecked exception if an identifier passed to get() does not exist as a row in the returned query.

This pattern is not ideal, and instead should simply return null, thereby allowing clients to easily skip non-existent objects much more cleanly and more lightweight than exception handling.

Additionally, the ViewChangedEventListener interface does not provide a way to know which query was invoked for the callback. It is cumbersome to create per-query ViewChangedEventListener objects which allows you to avoid querying identifiers that you know exist in the query result callback.

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