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org.eclipse.persistence.config
Class CacheUsageIndirectionPolicy

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

Author:

James Sutherland

See Also:

QueryHints.INDIRECTION_POLICY, ObjectLevelReadQuery.setInMemoryQueryIndirectionPolicyState(int)

Field Summary

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.

Constructor Summary

CacheUsageIndirectionPolicy()

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()

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