Managing a large project’s systems, and ensuring their enable/disable ordering can be tiresome. Automate the process.

AESystem.java

package com.gmail.justisroot.autoecon;

import java.util.ArrayList;
import java.util.List;

import com.gmail.justisroot.autoecon.command.SoftCommand;
import com.gmail.justisroot.autoecon.data.EventProvider;
import com.gmail.justisroot.autoecon.data.FilePool;
import com.gmail.justisroot.autoecon.data.ScheduledSave;
import com.gmail.justisroot.autoecon.data.file.UserData;
import com.gmail.justisroot.autoecon.data.text.PlaceholderProvider;
import com.gmail.justisroot.autoecon.economy.EconomyWrapper;
import com.gmail.justisroot.autoecon.economy.MarketDirector;
import com.gmail.justisroot.autoecon.economy.items.EconItem;
import com.gmail.justisroot.autoecon.inventory.GUIListener;

public enum AESystem {

	FILE_POOL(FilePool.install()),
	ECON_ITEM(EconItem.install(), FILE_POOL),
	EVENT_PROVIDER(EventProvider.install()),
	USER_DATA(UserData.install(), EVENT_PROVIDER),
	GUI_LISTENER(GUIListener.install(), EVENT_PROVIDER),
	MARKET_DIRECTOR(MarketDirector.install(), FILE_POOL, USER_DATA, EVENT_PROVIDER),
	ECONOMY_WRAPPER(EconomyWrapper.install(), FILE_POOL, EVENT_PROVIDER),
	SCHEDULED_SAVE(ScheduledSave.install(), FILE_POOL, MARKET_DIRECTOR),
	PLACEHOLDER_PROVIDER(PlaceholderProvider.install(), MARKET_DIRECTOR, ECONOMY_WRAPPER, ECON_ITEM),
	COMMANDS(SoftCommand.install(), FILE_POOL, MARKET_DIRECTOR);

	private final Switch swij;
	private final AESystem[] dependencies;
	private final List<AESystem> requiredBy = new ArrayList<>();

	private AESystem(Switch swij, AESystem... dependencies) {
		this.swij = swij;
		this.dependencies = dependencies;
		for (AESystem dependency : dependencies)
			dependency.requiredBy.add(this);
	}

	public static abstract class Switch {

		private boolean enabled;

		private void enable() {
			this.onEnable();
			this.enabled = true;
		}

		private void disable() {
			this.onDisable();
			this.enabled = true;
		}

		private boolean isEnabled() {
			return this.enabled;
		}

		public abstract void onEnable();
		public abstract void onDisable();

	}

	public static final void enableAll() {
		for (AESystem system : values()) {
			for (AESystem dependency : system.dependencies)
				if (!dependency.swij.isEnabled())
					dependency.swij.enable();
			if (!system.swij.isEnabled())
				system.swij.enable();
		}
	}

	public static final void disableAll() {
		for (AESystem system : values()) {
			for (AESystem requiring : system.requiredBy)
				if (requiring.swij.isEnabled())
					requiring.swij.disable();
			if (system.swij.isEnabled())
				system.swij.disable();
		}
	}

}