Module eclipselink
Package org.eclipse.persistence.config

Class CacheUsageIndirectionPolicy

java.lang.Object
org.eclipse.persistence.config.CacheUsageIndirectionPolicy
public final class CacheUsageIndirectionPolicy extends Object
In-memory querying and conforming indirection policy.

The class contains all the valid values for QueryHints.INDIRECTION_POLICY query hint. This can be used on a query with a CACHE_USAGE hint to configure the behavior of in-memory querying and conforming's treatment of uninstantiated indirection/lazy relationships. This is only relevant when the query traverses a join across a lazy relationship.

JPA Query Hint usage: 

 query.setHint(QueryHints.INDIRECTION_POLICY, CacheUsageIndirectionPolicy.Trigger);

or 

 @QueryHint(name=QueryHints.INDIRECTION_POLICY, value=CacheUsageIndirectionPolicy.Trigger)

Hint values are case-insensitive. "" could be used instead of default value CacheUsageIndirectionPolicy.Exception.

See Also:
Author:
James Sutherland

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final String
    Conform
    If conforming encounters an uninstantiated indirection/lazy object it is assumed to conform.
    static final String
    DEFAULT
    The default type is Exception.
    static final String
    Exception
    If conforming encounters an uninstantiated indirection/lazy object an exception is thrown.
    static final String
    NotConform
    If conforming encounters an uninstantiated indirection/lazy object it is assumed to not conform.
    static final String
    Trigger
    If conforming encounters an uninstantiated indirection/lazy object it is triggered.

  • Method Summary

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • Exception

      public static final String Exception
      If conforming encounters an uninstantiated indirection/lazy object an exception is thrown.
      See Also:

    • Trigger

      public static final String Trigger
      If conforming encounters an uninstantiated indirection/lazy object it is triggered.
      See Also:

    • Conform

      public static final String Conform
      If conforming encounters an uninstantiated indirection/lazy object it is assumed to conform.
      See Also:

    • NotConform

      public static final String NotConform
      If conforming encounters an uninstantiated indirection/lazy object it is assumed to not conform.
      See Also:

    • DEFAULT

      public static final String DEFAULT
      The default type is Exception.
      See Also: