/*
 * 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.skywalking.apm.collector.analysis.register.provider.register;

/**
 * @author peng-yongsheng
 */
public enum IdAutoIncrement {
    INSTANCE;

    public int increment(int min, int max) {
        int id;
        if (min == max) {
            if (min == 0) {
                id = -1;
            } else {
                id = 1;
            }
        } else if (min + max == 0) {
            id = max + 1;
        } else if (min + max > 0) {
            id = min - 1;
        } else {
            id = max + 1;
        }
        return id;
    }
}
