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ConnectionWrapper.java
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ConnectionWrapper.java
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/**
* Copyright (C) 2016 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.exceptions.OWLPersistenceException;
import cz.cvut.kbss.jopa.model.descriptors.Descriptor;
import cz.cvut.kbss.jopa.oom.ObjectOntologyMapper;
import cz.cvut.kbss.jopa.oom.ObjectOntologyMapperImpl;
import cz.cvut.kbss.jopa.utils.EntityPropertiesUtils;
import cz.cvut.kbss.ontodriver.Connection;
import cz.cvut.kbss.ontodriver.Statement;
import cz.cvut.kbss.ontodriver.exception.OntoDriverException;
import java.lang.reflect.Field;
import java.net.URI;
import java.util.List;
public class ConnectionWrapper {
private final Connection connection;
private ObjectOntologyMapper mapper;
public ConnectionWrapper(Connection connection) {
this.connection = connection;
}
void setUnitOfWork(UnitOfWorkImpl uow) {
this.mapper = new ObjectOntologyMapperImpl(uow, connection);
}
<T> boolean contains(Object primaryKey, Class<T> cls, Descriptor descriptor) {
final URI pkUri = getPrimaryKeyAsUri(primaryKey);
return pkUri != null && mapper.containsEntity(cls, pkUri, descriptor);
}
<T> T find(LoadingParameters<T> loadingParameters) {
return mapper.loadEntity(loadingParameters);
}
<T> void merge(T entity, Field field, Descriptor descriptor) {
mapper.updateFieldValue(entity, field, descriptor);
}
<T> void persist(Object primaryKey, T entity, Descriptor descriptor) {
final URI pkUri = getPrimaryKeyAsUri(primaryKey);
mapper.persistEntity(pkUri, entity, descriptor);
}
<T> void remove(Object primaryKey, Class<T> cls, Descriptor descriptor) {
final URI pkUri = getPrimaryKeyAsUri(primaryKey);
mapper.removeEntity(pkUri, cls, descriptor);
}
<T> void loadFieldValue(T entity, Field field, Descriptor descriptor) {
mapper.loadFieldValue(entity, field, descriptor);
}
void commit() {
try {
mapper.checkForUnpersistedChanges();
connection.commit();
} catch (OntoDriverException e) {
throw new OWLPersistenceException(e);
}
}
void rollback() {
try {
connection.rollback();
} catch (OntoDriverException e) {
throw new OWLPersistenceException(e);
}
}
void close() {
try {
connection.close();
} catch (Exception e) {
throw new OWLPersistenceException(e);
}
}
boolean isConsistent(URI context) {
try {
return connection.isConsistent(context);
} catch (OntoDriverException e) {
throw new OWLPersistenceException(e);
}
}
List<URI> getContexts() {
try {
return connection.getContexts();
} catch (OntoDriverException e) {
throw new OWLPersistenceException(e);
}
}
public Statement createStatement() {
try {
return connection.createStatement();
} catch (OntoDriverException e) {
throw new OWLPersistenceException(e);
}
}
private URI getPrimaryKeyAsUri(Object primaryKey) {
return primaryKey == null ? null : EntityPropertiesUtils.getValueAsURI(primaryKey);
}
}