package net.minecraft.core;

import org.jetbrains.annotations.Nullable;

public interface IdMap<T> extends Iterable<T> {
	int DEFAULT = -1;

	/**
	 * @return the integer ID used to identify the given object
	 */
	int getId(T value);

	@Nullable
	T byId(int id);

	default T byIdOrThrow(int id) {
		T object = this.byId(id);
		if (object == null) {
			throw new IllegalArgumentException("No value with id " + id);
		} else {
			return object;
		}
	}

	default int getIdOrThrow(T value) {
		int i = this.getId(value);
		if (i == -1) {
			throw new IllegalArgumentException("Can't find id for '" + value + "' in map " + this);
		} else {
			return i;
		}
	}

	int size();
}