IsolationLevel.java

/*
 * Copyright (C) 2019 Brett Wooldridge
 *
 * 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 com.zaxxer.hikari.util;

/**
 * An enumeration representing the various isolation levels for database transactions.
 * Each isolation level corresponds to a specific behavior regarding visibility of changes made by other transactions.
 * The levels are defined according to the SQL standard and may vary in implementation across different databases.
 *
 * @author Brett Wooldridge
 * @hidden
 */
public enum IsolationLevel
{
   TRANSACTION_NONE(0),
   TRANSACTION_READ_UNCOMMITTED(1),
   TRANSACTION_READ_COMMITTED(2),
   TRANSACTION_CURSOR_STABILITY(3),
   TRANSACTION_REPEATABLE_READ(4),
   TRANSACTION_LAST_COMMITTED(5),
   TRANSACTION_SERIALIZABLE(8),
   TRANSACTION_SQL_SERVER_SNAPSHOT_ISOLATION_LEVEL(4096);

   private final int levelId;

   IsolationLevel(int levelId) {
      this.levelId = levelId;
   }

   public int getLevelId() {
      return levelId;
   }
}