public Class CacheUsageIndirectionPolicy

Class Inheritance

extends Object

java.lang.Object
org.eclipse.persistence.config.CacheUsageIndirectionPolicy

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);

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

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

Author: James Sutherland
See Also: QueryHints#INDIRECTION_POLICY, org.eclipse.persistence.queries.ObjectLevelReadQuery#setInMemoryQueryIndirectionPolicyState(int)

Field Summary

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

Constructor Summary

Access	Constructor and Description
public	CacheUsageIndirectionPolicy()

Method Summary

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

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

DEFAULT	back to summary
public static final String DEFAULT The default type is Exception.

Exception	back to summary
public static final String Exception If conforming encounters an uninstantiated indirection/lazy object an exception is thrown.

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

Trigger	back to summary
public static final String Trigger If conforming encounters an uninstantiated indirection/lazy object it is triggered.

Constructor Detail

CacheUsageIndirectionPolicy	back to summary
public CacheUsageIndirectionPolicy()