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Cache.java
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Cache.java
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/**
* Copyright (C) 2022 Czech Technical University in Prague
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jopa.sessions;
import cz.cvut.kbss.jopa.model.descriptors.Descriptor;
import java.net.URI;
/**
* Interface used to interact with the second-level cache.
* <p>
* If a cache is not in use, the methods of this interface have no effect, except for contains, which
* returns false.
* <p>
* Taken from JPA 2.
*/
public interface Cache {
/**
* Checks whether the cache contains data for the given entity.
*
* @param cls Entity class
* @param identifier Instance identifier
* @param descriptor Specifies instance context and additional possible information, e.g. language tags
* @return {@code boolean} indicating whether the entity is in the cache
*/
boolean contains(Class<?> cls, Object identifier, Descriptor descriptor);
/**
* Removes the data for the given entity from the cache.
*
* @param cls Entity class
* @param identifier Instance identifier
* @param context Context URI, possibly {@code null}, meaning the default context
*/
void evict(Class<?> cls, Object identifier, URI context);
/**
* Removes the data for entities of the specified class (and its subclasses) from the cache.
* <p>
* This method removes the entities from all available contexts.
*
* @param cls entity class
*/
void evict(Class<?> cls);
/**
* Removes the data for entities of the specified repository context from the cache.
*
* @param context URI of the context to evict, possibly {@code null}, meaning the default context
*/
void evict(URI context);
/**
* Clears the cache.
*/
void evictAll();
}