/**
* Expand an cause object.
*
* @param list the list to add elements to
* @param element an array of objects
*/
private static void expand(List<Object> list, @Nullable Object... element) {
if (element != null) {
for (Object o : element) {
if (o == null) {
continue;
}
if (o instanceof TNTPrimed) {
expand(list, ((TNTPrimed) o).getSource());
} else if (o instanceof Projectile) {
expand(list, ((Projectile) o).getShooter());
} else if (o instanceof Vehicle) {
expand(list, ((Vehicle) o).getPassenger());
} else if (o instanceof Tameable) {
expand(list, ((Tameable) o).getOwner());
}
// Add manually tracked parent causes
Object source = o;
int index = list.size();
while (source instanceof Metadatable && !(source instanceof Block)) {
source = WGMetadata.getIfPresent((Metadatable) source, CAUSE_KEY, Object.class);
if (source != null) {
list.add(index, source);
}
}
list.add(o);
}
}
}
/**
* Add a parent cause to a {@code Metadatable} object.
*
* <p>Note that {@code target} cannot be an instance of {@link Block} because {@link
* #create(Object...)} will not bother checking for such data on blocks (because it is relatively
* costly to do so).
*
* @param target the target
* @param parent the parent cause
* @throws IllegalArgumentException thrown if {@code target} is an instance of {@link Block}
*/
public static void trackParentCause(Metadatable target, Object parent) {
if (target instanceof Block) {
throw new IllegalArgumentException(
"Can't track causes on Blocks because Cause doesn't check block metadata");
}
WGMetadata.put(target, CAUSE_KEY, parent);
}