com.speedment.runtime.core.internal.component.EntityManagerImpl Maven / Gradle / Ivy
/**
*
* Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); You may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.speedment.runtime.core.internal.component;
import com.speedment.common.injector.annotation.ExecuteBefore;
import com.speedment.runtime.core.component.EntityManager;
import com.speedment.runtime.core.component.ManagerComponent;
import com.speedment.runtime.core.exception.SpeedmentException;
import com.speedment.runtime.core.manager.Manager;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;
import static com.speedment.common.injector.State.RESOLVED;
import static com.speedment.common.invariant.NullUtil.requireNonNulls;
import static java.util.Objects.requireNonNull;
/**
*
* @author Emil Forslund
*/
public final class EntityManagerImpl implements EntityManager {
private final Map, Manager> managers;
public EntityManagerImpl() {
this.managers = new ConcurrentHashMap<>();
}
@ExecuteBefore(RESOLVED)
void installManagers(ManagerComponent managerComponent) {
managerComponent.stream()
.forEach(m -> managers.put(m.getEntityClass(), m));
}
@Override
public void persist(ENTITY entity) throws SpeedmentException {
requireNonNull(entity);
managerOf(entity).persist(entity);
}
@Override
public void update(ENTITY entity) throws SpeedmentException {
requireNonNull(entity);
managerOf(entity).update(entity);
}
@Override
public void remove(ENTITY entity) throws SpeedmentException {
requireNonNull(entity);
managerOf(entity).remove(entity);
}
private Manager managerOf(ENTITY entity) {
requireNonNull(entity);
@SuppressWarnings("rawtypes")
final Optional manager = lookup(entity.getClass());
if (manager.isPresent()) {
@SuppressWarnings("unchecked")
final Manager result = (Manager) manager.get();
return result;
}
throw new IllegalStateException("There is no registered Manager for the class " + entity.getClass().getName());
}
@SuppressWarnings("rawtypes")
private Optional lookup(Class entityClass) {
requireNonNulls(entityClass);
// Base case in recursion
@SuppressWarnings("unchecked")
final Manager manager = (Manager)managers.get(entityClass);
if (manager != null) {
return Optional.of(manager);
}
for (final Class parentEntityInterface : entityClass.getInterfaces()) {
// Recuresively explore...
final Optional parentManager = lookup(parentEntityInterface);
if (parentManager.isPresent()) {
return parentManager;
}
}
return Optional.empty();
}
}