/*
* Mojito Distributed Hash Table (Mojito DHT)
* Copyright (C) 2006-2007 LimeWire LLC
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.limewire.mojito;
import java.io.Serializable;
import java.util.Map;
import org.limewire.mojito.util.FixedSizeHashMap;
/**
* A 16 bit <code>int</code> value and a String which may or may
* not describe the <code>StatusCode</code>.
*/
public class StatusCode implements Serializable, Comparable<StatusCode> {
private static final long serialVersionUID = 948952689527998250L;
private static final Map<Integer, StatusCode> CODES
= new FixedSizeHashMap<Integer, StatusCode>(16, 0.75f, true, 32);
private final int code;
private final String description;
private StatusCode(int code, String description) {
this.code = code;
this.description = description;
}
/**
* Returns the actual status code.
*/
public int shortValue() {
return code;
}
/**
* Returns the description of the StatusCode.
*/
public String getDescription() {
return description;
}
public int compareTo(StatusCode other) {
return code - other.code;
}
@Override
public int hashCode() {
return code;
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
} else if (!(o instanceof StatusCode)) {
return false;
}
return compareTo((StatusCode)o) == 0;
}
@Override
public String toString() {
return code + ": " + description;
}
/**
* Returns a canonical version of status code.
*
* @param description must not be null
*/
public static StatusCode valueOf(int code, String description) {
if (description == null) {
throw new NullPointerException("description must not be null, code: " + code);
}
Integer key = Integer.valueOf(code & 0xFFFF);
StatusCode statusCode = null;
synchronized (CODES) {
statusCode = CODES.get(key);
if (statusCode == null || !statusCode.description.equals(description)) {
statusCode = new StatusCode(code, description);
CODES.put(key, statusCode);
}
}
return statusCode;
}
}