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 /*
  * Copyright (c) 2008, 2009 Sun Microsystems. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
  * which accompanies this distribution.
  * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
  * and the Eclipse Distribution License is available at
  * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Linda DeMichiel - Java Persistence 2.0 - Version 2.0 (October 1, 2009)
 *     Specification available from http://jcp.org/en/jsr/detail?id=317
 */
// $Id: Cache.java 20957 2011-06-13 09:58:51Z stliu $
package javax.persistence;

Interface used to interact with the second-level cache. If a cache is not in use, the methods of this interface have no effect, except for contains, which returns false.

Since:
Java Persistence 2.0
public interface Cache {

    
Whether the cache contains data for the given entity.

Parameters:
cls entity class
primaryKey primary key
Returns:
boolean indicating whether the entity is in the cache
    public boolean contains(Class clsObject primaryKey);

    
Remove the data for the given entity from the cache.

Parameters:
cls entity class
primaryKey primary key
    public void evict(Class clsObject primaryKey);

    
Remove the data for entities of the specified class (and its subclasses) from the cache.

Parameters:
cls entity class
    public void evict(Class cls);

    
Clear the cache.
    public void evictAll();
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