/* Copyright (c) 2009 Peter Troshin
 *  
 *  JAva Bioinformatics Analysis Web Services (JABAWS) @version: 1.0     
 * 
 *  This library is free software; you can redistribute it and/or modify it under the terms of the
 *  Apache License version 2 as published by the Apache Software Foundation
 * 
 *  This library 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 Apache 
 *  License for more details.
 * 
 *  A copy of the license is in apache_license.txt. It is also available here:
 * @see: http://www.apache.org/licenses/LICENSE-2.0.txt
 * 
 * Any republication or derived work distributed in source code form
 * must include this copyright and license notice.
 */

package compbio.engine.conf;

import javax.management.openmbean.InvalidKeyException;

import compbio.util.Util;

@Deprecated
public final class _Key {

	public final static String DELIM = "#";

	private final String cname;
	private final long id;

	public _Key(Class<?> clazz) {
		if (clazz == null) {
			throw new IllegalArgumentException("Class or Id is NULL");
		}
		this.cname = clazz.getSimpleName();
		this.id = getNonRepeatableNumber();
	}

	_Key(Class<?> clazz, long id) {
		if (clazz == null) {
			throw new IllegalArgumentException("Class or Id is NULL");
		}
		this.cname = clazz.getSimpleName();
		this.id = id;
	}

	@Override
	public boolean equals(Object obj) {
		if (obj == null) {
			return false;
		}
		_Key ckey = null;
		if (obj instanceof _Key) {
			ckey = (_Key) obj;
		} else {
			return false;
		}
		if (ckey.cname.equals(this.cname) && id == ckey.id) {
			return true;
		}
		return false;
	}

	@Override
	public String toString() {
		return cname + DELIM + id;
	}

	/*
	 * id = 533411011589881 - 15 or 16 chars depending on the OS
	 * 
	 * @see java.lang.Object#hashCode()
	 */
	@Override
	public int hashCode() {
		return new Integer(cname.hashCode()
				* new Integer(new Long(id).toString().substring(9))).intValue();
	}

	static long getNonRepeatableNumber() {
		// Keep the random number 2 digits wide to simplify the task Id parsing
		// if required
		// The random value is concatenated with time value not added to it and
		// then converted to long.
		return Long.parseLong(Util.getRandomNumber(10, 99) + ""
				+ System.nanoTime());
	}

	public static _Key parse(String key) {
		if (Util.isEmpty(key)) {
			throw new NullPointerException("Key must be provided!");
		}
		if (!key.contains(DELIM)) {
			throw new InvalidKeyException("Key " + key
					+ " is not a valid task id");
		}

		int idx = key.indexOf(DELIM);
		if (idx < 0) {
			throw new InvalidKeyException("Key " + key
					+ " is not a valid task id");
		}
		String runnerName = key.substring(0, idx);
		long id = 0;
		Class<?> runner = null;
		try {
			runner = Class.forName(runnerName);
			id = Long.parseLong(key.substring(idx + 1));
		} catch (NumberFormatException e) {
			throw new InvalidKeyException("Key " + key
					+ " is not a valid task id");
		} catch (ClassNotFoundException e) {
			throw new InvalidKeyException("Key " + key
					+ " is not a valid task id");
		}
		return new _Key(runner, id);
	}

}