/* * Copyright 2005-2011 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.wamblee.xmlrouter.common; /** * This class provides a generic typesafe id wrapping a long value. * * @author Erik Brakkee * * @param * Type the id refers to. */ public class Id implements Comparable> { private String id; /** * Constructs the id. * * @param aId * Integer id. * @throws NullPointerException * in case the id is null. */ public Id(String aId) { if (aId == null) { throw new NullPointerException("id is null"); } id = aId; } /** * @return The underlying id. */ public String getId() { return id; } @Override public int hashCode() { return id.hashCode(); } @Override public boolean equals(Object aObj) { if (aObj == null) { return false; } if (!(aObj instanceof Id)) { return false; } return id.equals(((Id) aObj).id); } @Override public String toString() { return id; } @Override public int compareTo(Id aId) { return id.compareTo(aId.getId()); } }