| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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.apache.impala.common; |
| |
| /** |
| * Generator of consecutively numbered integers to be used as ids by subclasses of Id. |
| * Subclasses of Id should be able to create a generator for their Id type. |
| */ |
| public abstract class IdGenerator<IdType extends Id<IdType>> { |
| protected int nextId_ = 0; |
| public abstract IdType getNextId(); |
| public abstract IdType getMaxId(); |
| } |
