src/main/java/li/cil/oc/api/Machine.java

package li.cil.oc.api;

import li.cil.oc.api.detail.MachineAPI;
import li.cil.oc.api.machine.Architecture;
import li.cil.oc.api.machine.Owner;

import java.util.Collections;

/**
 * This API is intended for people who would like to implement custom computer
 * blocks or anything else hosting a computer.
 * <p/>
 * It also allows registering new {@link li.cil.oc.api.machine.Architecture}s,
 * which are implementations of specific languages (e.g. assembler). The built-
 * in ones are available as static fields in this class.
 * <p/>
 * Note that registration of architectures is optional and only intended as a
 * convenience feature to provide mods with a way to iterate available
 * architectures using {@link #architectures()}. Also note that any architecture
 * passed to {@link #create(li.cil.oc.api.machine.Owner, Class)} that has not
 * yet been registered will automatically be registered.
 * <p/>
 * Note that these methods should <em>not</em> be called in the pre-init phase,
 * since the {@link #instance} may not have been initialized at that time. Only
 * start calling these methods in the init phase or later.
 */
public final class Machine {
    public static void add(Class<? extends Architecture> architecture) {
        if (instance != null) instance.add(architecture);
    }

    public static Iterable<Class<? extends Architecture>> architectures() {
        if (instance != null) return instance.architectures();
        return Collections.emptyList();
    }

    public static li.cil.oc.server.component.machine.Machine create(Owner owner, Class<? extends Architecture> architecture) {
        if (instance != null) return instance.create(owner, architecture);
        return null;
    }

    public static li.cil.oc.server.component.machine.Machine create(Owner owner) {
        if (instance != null) return instance.create(owner, LuaArchitecture);
        return null;
    }

    // ----------------------------------------------------------------------- //

    private Machine() {
    }

    public static MachineAPI instance = null;

    /**
     * The built-in Lua architecture. This will be set to the native Lua
     * implementation when possible, to the LuaJ fallback, otherwise.
     */
    public static Class<? extends Architecture> LuaArchitecture = null;
}