/*
* Copyright 2014 MovingBlocks
*
* 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 org.terasology.persistence.internal;
import org.terasology.entitySystem.Component;
import org.terasology.entitySystem.entity.EntityManager;
import org.terasology.entitySystem.entity.EntityRef;
import org.terasology.entitySystem.event.Event;
import org.terasology.entitySystem.prefab.Prefab;
/**
* The class represents a future entity ref that has yet to be bound to an entity manager.
* <p>
* Currently it gets used by the StorageManager to create entity refs on the main thread for storage off the main
* thread. During the storage the entities will be bound to the entity manager that is private the the saving thread.
*
*/
public class DelayedEntityRef extends EntityRef {
private final long id;
private EntityRef entityRef;
public DelayedEntityRef(long id) {
this.id = id;
this.entityRef = null;
}
private EntityRef getEntityRef() {
if (entityRef == null) {
throw new IllegalStateException("The entity ref must be bound to an entity manager before it can be used");
}
return entityRef;
}
public void bindTo(EntityManager entityManager) {
if (entityRef != null) {
throw new IllegalStateException("Entity was already bound to an entity manager");
}
entityRef = entityManager.getEntity(id);
}
@Override
public EntityRef copy() {
return getEntityRef().copy();
}
@Override
public boolean exists() {
return getEntityRef().exists();
}
@Override
public boolean isActive() {
return getEntityRef().isActive();
}
@Override
public void destroy() {
getEntityRef().destroy();
}
@Override
public <T extends Event> T send(T event) {
return getEntityRef().send(event);
}
@Override
public long getId() {
return id;
}
@Override
public boolean isPersistent() {
return getEntityRef().isPersistent();
}
@Override
public boolean isAlwaysRelevant() {
return getEntityRef().isAlwaysRelevant();
}
@Override
public void setAlwaysRelevant(boolean alwaysRelevant) {
getEntityRef().setAlwaysRelevant(alwaysRelevant);
}
@Override
public EntityRef getOwner() {
return getEntityRef().getOwner();
}
@Override
public void setOwner(EntityRef owner) {
getEntityRef().setOwner(owner);
}
@Override
public Prefab getParentPrefab() {
return getEntityRef().getParentPrefab();
}
@Override
public String toFullDescription() {
return getEntityRef().toFullDescription();
}
@Override
public <T extends Component> T addComponent(T component) {
return getEntityRef().addComponent(component);
}
@Override
public void removeComponent(Class<? extends Component> componentClass) {
getEntityRef().removeComponent(componentClass);
}
@Override
public void saveComponent(Component component) {
getEntityRef().saveComponent(component);
}
@Override
public boolean hasComponent(Class<? extends Component> component) {
return getEntityRef().hasComponent(component);
}
@Override
public <T extends Component> T getComponent(Class<T> componentClass) {
return getEntityRef().getComponent(componentClass);
}
@Override
public Iterable<Component> iterateComponents() {
return getEntityRef().iterateComponents();
}
}