public EntityRef newInstance(BlockFamily blockFamily, EntityRef blockEntity) {
if (blockFamily == null) {
return EntityRef.NULL;
}
EntityBuilder builder = entityManager.newBuilder("engine:blockItemBase");
if (blockFamily.getArchetypeBlock().getLuminance() > 0) {
builder.addComponent(new LightComponent());
}
// Copy the components from block prefab into the block item
for (Component component : blockEntity.iterateComponents()) {
if (component.getClass().getAnnotation(AddToBlockBasedItem.class) != null) {
builder.addComponent(entityManager.getComponentLibrary().copy(component));
}
}
ItemComponent item = builder.getComponent(ItemComponent.class);
if (blockFamily.getArchetypeBlock().isStackable()) {
item.stackId = "block:" + blockFamily.getURI().toString();
item.stackCount = (byte) 1;
}
BlockItemComponent blockItem = builder.getComponent(BlockItemComponent.class);
blockItem.blockFamily = blockFamily;
return builder.build();
}
private void cleanUpTemporaryEntity(EntityRef entity) {
Prefab prefab = entity.getParentPrefab();
for (Component comp : entity.iterateComponents()) {
if (!COMMON_BLOCK_COMPONENTS.contains(comp.getClass())
&& (prefab == null || !prefab.hasComponent(comp.getClass()))) {
entity.removeComponent(comp.getClass());
}
}
entity.removeComponent(NetworkComponent.class);
if (prefab != null) {
for (Component comp : prefab.iterateComponents()) {
Component currentComp = entity.getComponent(comp.getClass());
if (currentComp == null) {
entity.addComponent(entityManager.getComponentLibrary().copy(comp));
} else {
ComponentMetadata<?> metadata =
entityManager.getComponentLibrary().getMetadata(comp.getClass());
boolean changed = false;
for (FieldMetadata field : metadata.getFields()) {
Object expected = field.getValue(comp);
if (!Objects.equal(expected, field.getValue(currentComp))) {
field.setValue(currentComp, expected);
changed = true;
}
}
if (changed) {
entity.saveComponent(currentComp);
}
}
}
}
entityManager.destroyEntityWithoutEvents(entity);
}
/**
* Transforms a block entity with the change of block type. This is driven from the delta between
* the old and new block type prefabs, but takes into account changes made to the block entity.
*
* @param blockEntity The entity to update
* @param oldType The previous type of the block
* @param type The new type of the block
*/
private void updateBlockEntityComponents(
EntityRef blockEntity,
Block oldType,
Block type,
Set<Class<? extends Component>> retainComponents) {
BlockComponent blockComponent = blockEntity.getComponent(BlockComponent.class);
Optional<Prefab> oldPrefab = oldType.getPrefab();
EntityBuilder oldEntityBuilder = entityManager.newBuilder(oldPrefab.orElse(null));
oldEntityBuilder.addComponent(
new BlockComponent(oldType, new Vector3i(blockComponent.getPosition())));
BeforeEntityCreated oldEntityEvent =
new BeforeEntityCreated(oldPrefab.orElse(null), oldEntityBuilder.iterateComponents());
blockEntity.send(oldEntityEvent);
for (Component comp : oldEntityEvent.getResultComponents()) {
oldEntityBuilder.addComponent(comp);
}
Optional<Prefab> newPrefab = type.getPrefab();
EntityBuilder newEntityBuilder = entityManager.newBuilder(newPrefab.orElse(null));
newEntityBuilder.addComponent(
new BlockComponent(type, new Vector3i(blockComponent.getPosition())));
BeforeEntityCreated newEntityEvent =
new BeforeEntityCreated(newPrefab.orElse(null), newEntityBuilder.iterateComponents());
blockEntity.send(newEntityEvent);
for (Component comp : newEntityEvent.getResultComponents()) {
newEntityBuilder.addComponent(comp);
}
for (Component component : blockEntity.iterateComponents()) {
if (!COMMON_BLOCK_COMPONENTS.contains(component.getClass())
&& !entityManager
.getComponentLibrary()
.getMetadata(component.getClass())
.isRetainUnalteredOnBlockChange()
&& !newEntityBuilder.hasComponent(component.getClass())
&& !retainComponents.contains(component.getClass())) {
blockEntity.removeComponent(component.getClass());
}
}
blockComponent.setBlock(type);
blockEntity.saveComponent(blockComponent);
HealthComponent health = blockEntity.getComponent(HealthComponent.class);
if (health == null && type.isDestructible()) {
blockEntity.addComponent(
new HealthComponent(type.getHardness(), type.getHardness() / BLOCK_REGEN_SECONDS, 1.0f));
} else if (health != null && !type.isDestructible()) {
blockEntity.removeComponent(HealthComponent.class);
} else if (health != null && type.isDestructible()) {
health.maxHealth = type.getHardness();
health.currentHealth = Math.min(health.currentHealth, health.maxHealth);
blockEntity.saveComponent(health);
}
for (Component comp : newEntityBuilder.iterateComponents()) {
copyIntoPrefab(blockEntity, comp, retainComponents);
}
}
private EntityData.PackedEntity.Builder serializeEntityFull(
EntityRef entityRef, FieldSerializeCheck<Component> fieldCheck) {
EntityData.PackedEntity.Builder entity = EntityData.PackedEntity.newBuilder();
ByteString.Output fieldIds = ByteString.newOutput();
ByteString.Output componentFieldCounts = ByteString.newOutput();
for (Component component : entityRef.iterateComponents()) {
if (!componentSerializeCheck.serialize(componentLibrary.getMetadata(component.getClass()))) {
continue;
}
serializeComponentFull(
component, false, fieldCheck, entity, fieldIds, componentFieldCounts, true);
}
entity.setFieldIds(fieldIds.toByteString());
entity.setComponentFieldCounts(componentFieldCounts.toByteString());
return entity;
}
private EntityData.PackedEntity.Builder serializeEntityDelta(
EntityRef entityRef, Prefab prefab, FieldSerializeCheck<Component> fieldCheck) {
EntityData.PackedEntity.Builder entity = EntityData.PackedEntity.newBuilder();
entity.setParentPrefabUri(prefab.getName());
Set<Class<? extends Component>> presentClasses = Sets.newHashSet();
ByteString.Output fieldIds = ByteString.newOutput();
ByteString.Output componentFieldCounts = ByteString.newOutput();
for (Component component : entityRef.iterateComponents()) {
if (!componentSerializeCheck.serialize(componentLibrary.getMetadata(component.getClass()))) {
continue;
}
presentClasses.add(component.getClass());
Component prefabComponent = prefab.getComponent(component.getClass());
if (prefabComponent == null) {
serializeComponentFull(
component, false, fieldCheck, entity, fieldIds, componentFieldCounts, true);
} else {
serializeComponentDelta(
prefabComponent, component, fieldCheck, entity, fieldIds, componentFieldCounts, true);
}
}
entity.setFieldIds(fieldIds.toByteString());
entity.setComponentFieldCounts(componentFieldCounts.toByteString());
for (Component prefabComponent : prefab.iterateComponents()) {
if (!presentClasses.contains(prefabComponent.getClass())
&& componentSerializeCheck.serialize(
componentLibrary.getMetadata(prefabComponent.getClass()))) {
entity.addRemovedComponent(idTable.get(prefabComponent.getClass()));
}
}
return entity;
}
