RecentFileSet.java

/**
 *
 */
package com.soundlooper.system.preferences.recentfile;

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

/**
 *-------------------------------------------------------
 * Sound Looper is an audio player that allow user to loop between two points
 * Copyright (C) 2014 Alexandre NEDJARI
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Manage the recent file list
 *
 * @author Alexandre NEDJARI
 * @since  19 juin 2012
 *-------------------------------------------------------
 */
public class RecentFileSet {

	/**
	 * The recent file list
	 */
	private ArrayList<RecentFile> recentFileList = new ArrayList<RecentFile>();

	/**
	 * The recent file list max size
	 */
	private int recentFileListSize;

	/**
	 * Constructor
	 * @param  newRecentFileListSize the max size of the set
	 */
	public RecentFileSet(int newRecentFileListSize) {
		this.recentFileListSize = newRecentFileListSize;
	}

	/**
	 * Add a new recent file to the list
	 * If the recent file is already in the list, just update
	 * The last access date
	 * @param recentFile the recent file to add/update
	 */
	public void addRecentFile(RecentFile recentFile) {
		if (!recentFile.getFile().exists()) {
			return;
		}
		for (RecentFile recentFileToCheck : this.recentFileList) {
			if (recentFileToCheck.getFile().equals(recentFile.getFile())) {
				//File is already in the recent files, just update the last access date
				recentFileToCheck.setLastAccessDate(recentFile.getLastAccessDate());
				return;
			}
		}
		//File is not already in the list, add it
		this.recentFileList.add(recentFile);
		Collections.sort(this.recentFileList, new RecentFileComparatorByLastAccessDate());
		while (this.recentFileList.size() > this.recentFileListSize) {
			this.recentFileList.remove(0);
		}
	}

	/**
	 * Get a copy of the complete list (sorted by last access date
	 * @return a copy of the complete list
	 */
	public List<RecentFile> getRecentFileListCopy() {
		Collections.sort(this.recentFileList, new RecentFileComparatorByLastAccessDate());
		return new ArrayList<RecentFile>(this.recentFileList);
	}

}