xy.reflect.ui.util.FututreActionBuilder Maven / Gradle / Ivy

/*******************************************************************************
 * Copyright (C) 2018 OTK Software
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * The GNU General Public License allows you also to freely redistribute 
 * the libraries under the same license, if you provide the terms of the 
 * GNU General Public License with them and add the following 
 * copyright notice at the appropriate place (with a link to 
 * http://javacollection.net/reflectionui/ web site when possible).
 ******************************************************************************/
package xy.reflect.ui.util;

import java.util.HashMap;
import java.util.Map;

public class FututreActionBuilder {

	protected Action currentAction;

	public Runnable will(FuturePerformance performance) {
		currentAction = new Action(performance);
		return currentAction;
	}

	public void setOption(String key, Object value) {
		if (currentAction == null) {
			throw new IllegalStateException("Cannot set action option: The performance was not specified");
		}
		currentAction.getOptions().put(key, value);
	}

	public void build() {
		if (currentAction == null) {
			throw new IllegalStateException("Cannot build action: The performance was not specified");
		}
		currentAction.setReady(true);
		currentAction = null;
	}

	protected class Action implements Runnable {

		protected boolean ready = false;
		protected FuturePerformance performance;
		protected Map options = new HashMap();

		public Action(FuturePerformance performance) {
			this.performance = performance;
		}

		public boolean isReady() {
			return ready;
		}

		public void setReady(boolean ready) {
			this.ready = ready;
		}

		public Map getOptions() {
			return options;
		}

		@Override
		public void run() {
			if (!ready) {
				throw new IllegalStateException("Cannot run action: Action creation is not finished");
			}
			performance.perform(options);
		}

	}

	public interface FuturePerformance {

		public void perform(Map options);

	}

}