Package org.eclipse.persistence.config

Class CacheUsageIndirectionPolicy

  • public class CacheUsageIndirectionPolicy
extends java.lang.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:
    QueryHints.INDIRECTION_POLICY, ObjectLevelReadQuery.setInMemoryQueryIndirectionPolicyState(int)
    Author:
    James Sutherland

    • Field Summary

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

      • Exception

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

      • Trigger

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

      • Conform

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

      • NotConform

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

      • DEFAULT

        public static final java.lang.String DEFAULT
        The default type is Exception.
        See Also:
        Constant Field Values

    • Constructor Detail

      • CacheUsageIndirectionPolicy

        public CacheUsageIndirectionPolicy()