org.opendaylight.yangtools.objcache.spi

Class NoopObjectCache

java.lang.Object

org.opendaylight.yangtools.objcache.spi.NoopObjectCache

All Implemented Interfaces:

ObjectCache

public final class NoopObjectCache
extends Object
implements ObjectCache

No-operation implementation of an Object Cache. This implementation does not do any caching, so it only returns the request object.

Method Summary

Modifier and Type	Method and Description
static NoopObjectCache	getInstance() Get the cache instance.
<B extends ProductAwareBuilder<P>,P> P	getProduct(B builder) Get a reference to an object equal to the product of a builder.
<T> T	getReference(T object) Get a reference for an object which is equal to specified object.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static NoopObjectCache getInstance()

Get the cache instance. Since the cache does not have any state, this method always returns a singleton instance.

Returns:

Cache instance.

getReference

public <T> T getReference(T object)

Description copied from interface: ObjectCache

Get a reference for an object which is equal to specified object. The cache is free return either a cached instance, or retain the object and return it back.

Specified by:

getReference in interface ObjectCache

Type Parameters:

T - object type

Parameters:

object - Requested object, may be null

Returns:

Reference to an object which is equal to the one passed in. If @object was @null, this method returns @null.

getProduct

public <B extends ProductAwareBuilder<P>,P> P getProduct(@Nonnull
                                                         B builder)

Description copied from interface: ObjectCache

Get a reference to an object equal to the product of a builder. The builder is expected to remain constant while this method executes. Unlike ObjectCache.getReference(Object), this method has the potential of completely eliding the product instantiation.

Specified by:

getProduct in interface ObjectCache

Type Parameters:

B - builder type

P - produced object type

Parameters:

builder - Builder instance, may not be null

Returns:

Result of builder's toInstance() product, or an equal object.