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/*
 * Copyright 2016- Anatoly Kutyakov
 *
 * 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 buckelieg.fn.db;

import java.sql.Connection;

/**
 * Transaction isolation level
 *
 * @see Connection#TRANSACTION_READ_UNCOMMITTED
 * @see Connection#TRANSACTION_READ_COMMITTED
 * @see Connection#TRANSACTION_REPEATABLE_READ
 * @see Connection#TRANSACTION_SERIALIZABLE
 */
public enum TransactionIsolation {

    READ_UNCOMMITTED(Connection.TRANSACTION_READ_UNCOMMITTED),
    READ_COMMITTED(Connection.TRANSACTION_READ_COMMITTED),
    REPEATABLE_READ(Connection.TRANSACTION_REPEATABLE_READ),
    SERIALIZABLE(Connection.TRANSACTION_SERIALIZABLE);

    int level;

    TransactionIsolation(int level) {
        this.level = level;
    }

    public static TransactionIsolation valueOf(int level) {
        switch (level) {
            case Connection.TRANSACTION_READ_COMMITTED : return READ_COMMITTED;
            case Connection.TRANSACTION_REPEATABLE_READ: return REPEATABLE_READ;
            case Connection.TRANSACTION_READ_UNCOMMITTED: return READ_UNCOMMITTED;
            case Connection.TRANSACTION_SERIALIZABLE: return SERIALIZABLE;
            default: throw new SQLRuntimeException("Unsupported transaction level: " + level);
        }
    }
}