com.goldencode.p2j.persist

Class FQLHelperCache

java.lang.Object

com.goldencode.p2j.persist.FQLHelperCache

final class FQLHelperCache
extends java.lang.Object

A cache of FQLHelper objects mapped to a complex key which encompasses the DMO implementation class, base where clause, Hibernate substitution types, restriction sorting, foreign key information, and whether the query is a project query.

An FQLHelper instance is retrieved using the get(java.lang.Class<? extends com.goldencode.p2j.persist.DataModelObject>, com.goldencode.p2j.persist.FqlType[], boolean, java.lang.String, java.lang.String, java.lang.Class<? extends com.goldencode.p2j.persist.DataModelObject>) method; it is stored in the cache using the put(java.lang.Class<? extends com.goldencode.p2j.persist.DataModelObject>, com.goldencode.p2j.persist.FqlType[], boolean, java.lang.String, java.lang.String, java.lang.Class<? extends com.goldencode.p2j.persist.DataModelObject>, com.goldencode.p2j.persist.FQLHelper) method.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	FQLHelperCache.Key FQLHelper hashable lookup key.

Field Summary

Fields

Modifier and Type	Field and Description
private Cache<FQLHelperCache.Key,FQLHelper>	cache Expiry cache of FQL helper objects

Constructor Summary

Constructors

Constructor and Description
FQLHelperCache() Default constructor.

Method Summary

Modifier and Type	Method and Description
(package private) FQLHelper	get(java.lang.Class<? extends DataModelObject> dmoIface, FqlType[] types, boolean idOnly, java.lang.String where, java.lang.String sort, java.lang.Class<? extends DataModelObject> joinIface) Attempt to retrieve an FQLHelper from the cache.
(package private) void	put(java.lang.Class<? extends DataModelObject> dmoIface, FqlType[] types, boolean idOnly, java.lang.String where, java.lang.String sort, java.lang.Class<? extends DataModelObject> joinIface, FQLHelper helper) Store an FQLHelper in the cache.

Methods inherited from class java.lang.Object

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

Field Detail

cache

private final Cache<FQLHelperCache.Key,FQLHelper> cache

Expiry cache of FQL helper objects

Constructor Detail

FQLHelperCache

FQLHelperCache()

Default constructor.

Method Detail

get

FQLHelper get(java.lang.Class<? extends DataModelObject> dmoIface,
              FqlType[] types,
              boolean idOnly,
              java.lang.String where,
              java.lang.String sort,
              java.lang.Class<? extends DataModelObject> joinIface)

Attempt to retrieve an FQLHelper from the cache.

Parameters:

dmoIface - DMO interface associated with the helper. May not be null.

types - Hibernate types of query substitution parameters. May be an empty array, but may not be null.

idOnly - Indicates whether query is a projection query returning the primary key ID only.

where - Where clause of a query. May be null.

sort - Order by clause of a query. May be null.

joinIface - Interface DMO associated within query by foreign key. May be null.

Returns:

A cached FQLHelper instance or null if an existing instance was not found in the cache.

put

void put(java.lang.Class<? extends DataModelObject> dmoIface,
         FqlType[] types,
         boolean idOnly,
         java.lang.String where,
         java.lang.String sort,
         java.lang.Class<? extends DataModelObject> joinIface,
         FQLHelper helper)

Store an FQLHelper in the cache.

Parameters:

dmoIface - DMO interface associated with the helper. May not be null.

types - Hibernate types of query substitution parameters. May be an empty array, but may not be null.

idOnly - Indicates whether query is a projection query returning the primary key ID only.

where - Where clause of a query. May be null.

sort - Order by clause of a query. May be null.

joinIface - Interface DMO associated within query by foreign key. May be null.

helper - FQLHelper instance to be cached.