public void install()

in Minecraft/src/main/java/com/microsoft/Malmo/MissionHandlers/CommandForKey.java [271:369]
85 lines of code
18 McCabe index (conditional complexity)

    public void install(MissionInit missionInit)
    {
        // Attempt to find the keybinding that matches the description we were given,
        // and replace it with our own KeyHook object:
        GameSettings settings = Minecraft.getMinecraft().gameSettings;
        boolean createdHook = false;
        // GameSettings contains both a field for each KeyBinding (eg keyBindAttack), and an array of KeyBindings with a pointer to
        // each field. We want to make sure we replace both pointers, otherwise Minecraft will end up using our object for some things, and
        // the original object for others.
        // So we need to use reflection to replace the field:
        Field[] fields = GameSettings.class.getFields();
        for (int i = 0; i < fields.length; i++)
        {
            Field f = fields[i];
            if (f.getType() == KeyBinding.class)
            {
                KeyBinding kb;
                try
                {
                    kb = (KeyBinding)(f.get(settings));
                    if (kb != null && kb.getKeyDescription().equals(this.keyDescription))
                    {
                        this.originalBinding = kb;
                        this.keyHook = create(this.originalBinding);
                        createdHook = true;
                        f.set(settings, this.keyHook);
                    }
                }
                catch (IllegalArgumentException e)
                {
                    e.printStackTrace();
                }
                catch (IllegalAccessException e)
                {
                    e.printStackTrace();
                }
            }
        }
        // And then we replace the pointer in the array:
        for (int i = 0; i < settings.keyBindings.length; i++)
        {
            if (settings.keyBindings[i].getKeyDescription().equals(this.keyDescription))
            {
                this.originalBindingIndex = i;
                if (!createdHook)
                {
                    this.originalBinding = settings.keyBindings[i];
                    this.keyHook = create(this.originalBinding);
                    createdHook = true;
                }
                settings.keyBindings[i] = this.keyHook;
            }
        }
        // And possibly in the hotbar array too:
        for (int i = 0; i < settings.keyBindsHotbar.length; i++)
        {
            if (settings.keyBindsHotbar[i].getKeyDescription().equals(this.keyDescription))
            {
                this.originalBindingIndex = i;
                if (!createdHook)
                {
                    this.originalBinding = settings.keyBindsHotbar[i];
                    this.keyHook = create(this.originalBinding);
                    createdHook = true;
                }
                settings.keyBindsHotbar[i] = this.keyHook;
            }
        }
        // Newer versions of MC have changed the way they map from key value to KeyBinding, so we
        // *also* need to fiddle with the static KeyBinding HASH map:
        Field[] kbfields = KeyBinding.class.getDeclaredFields();
        for (Field f : kbfields)
        {
            if (f.getType() == KeyBindingMap.class)
            {
                net.minecraftforge.client.settings.KeyBindingMap kbp;
                try
                {
                    f.setAccessible(true);
                    kbp = (KeyBindingMap) (f.get(null));
                    // Our new keybinding should already have been added;
                    // just need to remove the original one.
                    while (kbp.lookupAll(this.keyHook.getKeyCode()).size() > 1)
                        kbp.removeKey(this.originalBinding);
                    return;
                }
                catch (IllegalArgumentException e)
                {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                catch (IllegalAccessException e)
                {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }