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ObjectOntologyMapper.java
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ObjectOntologyMapper.java
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/**
* Copyright (C) 2016 Czech Technical University in Prague
* <p>
* 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.
* <p>
* 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.oom;
import java.lang.reflect.Field;
import java.net.URI;
import cz.cvut.kbss.jopa.model.descriptors.Descriptor;
import cz.cvut.kbss.jopa.oom.exceptions.UnpersistedChangeException;
import cz.cvut.kbss.jopa.sessions.LoadingParameters;
public interface ObjectOntologyMapper {
/**
* Checks whether the storage contains individual with the specified
* identifier and of the specified type. </p>
*
* @param cls Class representing the individual type
* @param primaryKey Identifier
* @param descriptor Descriptor, can specify context
* @return {@code true} if the ontology contains such individual,
* {@code false} otherwise
*/
<T> boolean containsEntity(Class<T> cls, URI primaryKey, Descriptor descriptor);
/**
* Loads and reconstructs the entity from the ontology. </p>
*
* @param loadingParameters Entity loading parameters
* @return Reconstructed entity or {@code null} if there is none such
*/
<T> T loadEntity(LoadingParameters<T> loadingParameters);
/**
* Loads entity field value and sets it on the specified entity. </p>
*
* @param entity The entity on which the field value will be set
* @param field The field to load
* @param descriptor Descriptor possibly specifying the field context
*/
<T> void loadFieldValue(T entity, Field field, Descriptor descriptor);
/**
* Persists the specified entity into the underlying ontology. </p>
*
* @param primaryKey Primary key of the persisted entity, possibly {@code null}
* @param entity The entity to persist
* @param descriptor Descriptor possibly specifying entity and attribute contexts
*/
<T> void persistEntity(URI primaryKey, T entity, Descriptor descriptor);
/**
* Removes entity with specified identifier from the ontology.
*
* @param primaryKey Entity identifier
* @param cls Entity class
* @param descriptor Descriptor specifying entity attribute contexts
*/
<T> void removeEntity(URI primaryKey, Class<T> cls, Descriptor descriptor);
/**
* Checks that there are no pending changes in the mapper. </p>
*
* @throws UnpersistedChangeException Thrown when there are unpersisted changes
*/
void checkForUnpersistedChanges();
/**
* Sets value of property represented by the specified field to the field's
* value.
*
* @param entity Entity containing the field
* @param field The field to update
* @param descriptor Optionally specifies context
*/
<T> void updateFieldValue(T entity, Field field, Descriptor descriptor);
}