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From "David Minor (JIRA)" <j...@apache.org>
Subject [jira] Updated: (OPENJPA-1741) Unecessary class load attempts when parsing JPQL
Date Wed, 21 Jul 2010 22:01:54 GMT

     [ https://issues.apache.org/jira/browse/OPENJPA-1741?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

David Minor updated OPENJPA-1741:
---------------------------------

    Attachment: cache-class-load-attempts.patch

Attached a patch to cache class load attempts in a HashMap, and return the cached results
for future identical class loads.

> Unecessary class load attempts when parsing JPQL
> ------------------------------------------------
>
>                 Key: OPENJPA-1741
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1741
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: query
>    Affects Versions: 1.2.2, 2.0.0
>            Reporter: David Minor
>         Attachments: cache-class-load-attempts.patch
>
>
> When parsing JPQL, JPQLExpressionBuilder.getPathOrConstant() tries to determine if a
token is a java class or enum by doing a class load (via QueryImpl.classForName()). The same
token will be tried as often as it appears in the query. It might be better to
> 1) cache the results
> 2) avoid the lookup if the token is a known variable name

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