001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.utils;
014
015/**
016 * Simple interface for defining atomic ID generators.
017 *
018 * @param <K> The ID type.
019 */
020public interface IdGenerator<K> {
021
022   /**
023    * Returns the next available ID.
024    *
025    * @return The next available ID.
026    */
027   K next();
028
029   /**
030    * Sets a lower bound for this generator.
031    *
032    * @param k The lower bound.
033    */
034   void lb(K k);
035}