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60 lines
2.0 KiB
60 lines
2.0 KiB
/* |
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* Copyright (c) 2008, 2009, 2011 Oracle, Inc. All rights reserved. |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 |
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* which accompanies this distribution. The Eclipse Public License is available |
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* at http://www.eclipse.org/legal/epl-v10.html and the Eclipse Distribution License |
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* is available at http://www.eclipse.org/org/documents/edl-v10.php. |
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*/ |
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package com.fr.third.javax.persistence; |
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/** |
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* Interface used to interact with the second-level cache. |
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* If a cache is not in use, the methods of this interface have |
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* no effect, except for <code>contains</code>, which returns false. |
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* |
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* @since Java Persistence 2.0 |
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*/ |
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public interface Cache { |
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/** |
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* Whether the cache contains data for the given entity. |
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* @param cls entity class |
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* @param primaryKey primary key |
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* @return boolean indicating whether the entity is in the cache |
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*/ |
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public boolean contains(Class cls, Object primaryKey); |
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/** |
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* Remove the data for the given entity from the cache. |
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* @param cls entity class |
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* @param primaryKey primary key |
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*/ |
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public void evict(Class cls, Object primaryKey); |
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/** |
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* Remove the data for entities of the specified class (and its |
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* subclasses) from the cache. |
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* @param cls entity class |
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*/ |
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public void evict(Class cls); |
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/** |
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* Clear the cache. |
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*/ |
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public void evictAll(); |
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/** |
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* Return an object of the specified type to allow access to the provider-specific API. |
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* |
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* If the provider's Cache implementation does not support the specified class, the |
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* PersistenceException is thrown. |
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* @param cls the class of the object to be returned. This is normally either the |
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* underlying Cache implementation class or an interface that it implements. |
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* @return an instance of the specified class |
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* @throws PersistenceException if the provider does not support the call |
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*/ |
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public <T> T unwrap(Class<T> cls); |
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}
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