IDManager.java

/*******************************************************************************
 * DialogueEditor
 * Copyright (C) 2013-2014 Pawel Pastuszak
 * <p>
 * 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.
 * <p>
 * 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.
 * <p>
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/

package pl.kotcrab.jdialogue.editor.components;

import java.util.ArrayList;
import java.util.Collections;

public class IDManager {
	private ArrayList<Integer> freeIDs = new ArrayList<>(30);

	private int IDCounter = 1;

	public IDManager () {
		genertesIDs();
	}

	private void genertesIDs () {
		int targetIDCounter = IDCounter + 30;
		for (; IDCounter < targetIDCounter; IDCounter++) {
			freeIDs.add(IDCounter);
		}
	}

	public void freeID (int id) {
		if (freeIDs.contains(id))
			return;
		else
			freeIDs.add(id);

		Collections.sort(freeIDs);
	}

	public int getFreeId () {
		if (freeIDs.size() == 0) genertesIDs(); //we ran out of ids, generate more!

		int id = freeIDs.get(0);
		freeIDs.remove(0);
		return id;
	}
}