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JOPAPersistenceProvider.java
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JOPAPersistenceProvider.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.model;
import cz.cvut.kbss.jopa.exceptions.OWLInferredAttributeModifiedException;
import cz.cvut.kbss.jopa.sessions.CloneBuilderImpl;
import java.lang.reflect.Field;
import java.util.HashSet;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
public class JOPAPersistenceProvider implements PersistenceProvider, ProviderUtil {
private static Set<EntityManagerFactoryImpl> emfs = new HashSet<>();
@Override
public EntityManagerFactoryImpl createEntityManagerFactory(String emName, Map<String, String> properties) {
final EntityManagerFactoryImpl emf = new EntityManagerFactoryImpl(properties);
emfs.add(emf);
return emf;
}
@Override
public ProviderUtil getProviderUtil() {
return this;
}
@Override
public LoadState isLoaded(Object entity) {
final Optional<EntityManagerFactoryImpl> found = emfs.stream().filter(emf -> emf.isLoaded(entity)).findAny();
return found.map(entityManagerFactory -> LoadState.LOADED).orElse(LoadState.UNKNOWN);
}
@Override
public LoadState isLoadedWithReference(Object entity, String attributeName) {
return isLoadedWithoutReference(entity, attributeName);
}
@Override
public LoadState isLoadedWithoutReference(Object entity, String attributeName) {
final Optional<EntityManagerFactoryImpl> found = emfs.stream()
.filter(emf -> emf.isLoaded(entity, attributeName))
.findAny();
return found.map(entityManagerFactory -> LoadState.LOADED).orElse(LoadState.UNKNOWN);
}
static void verifyInferredAttributeNotModified(Object entity, Field field) {
if (CloneBuilderImpl.isFieldInferred(field)) {
throw new OWLInferredAttributeModifiedException(
String.format("Field %s of instance %s is inferred and cannot be modified.", field, entity));
}
}
}