package io.ebean.annotation;

import java.sql.Connection;

The Transaction Isolation levels.

These match those of java.sql.Connection with the addition of DEFAULT which
implies the configured default of the DataSource.


This can be used with TxScope to define transactional scopes to execute
method within.

/**
 * The Transaction Isolation levels.
 * <p>
 * These match those of java.sql.Connection with the addition of DEFAULT which
 * implies the configured default of the DataSource.
 * </p>
 * <p>
 * This can be used with TxScope to define transactional scopes to execute
 * method within.
 * </p>
 */
public enum TxIsolation {

  
Read Committed Isolation level. This is typically the default for most
configurations.
/**
   * Read Committed Isolation level. This is typically the default for most
   * configurations.
   */
  READ_COMMITED(Connection.TRANSACTION_READ_COMMITTED),

  
Read uncommitted Isolation level.
/**
   * Read uncommitted Isolation level.
   */
  READ_UNCOMMITTED(Connection.TRANSACTION_READ_UNCOMMITTED),

  
Repeatable Read Isolation level.
/**
   * Repeatable Read Isolation level.
   */
  REPEATABLE_READ(Connection.TRANSACTION_REPEATABLE_READ),

  
Serializable Isolation level.
/**
   * Serializable Isolation level.
   */
  SERIALIZABLE(Connection.TRANSACTION_SERIALIZABLE),

  
No Isolation level.
/**
   * No Isolation level.
   */
  NONE(Connection.TRANSACTION_NONE),

  
The default isolation level. This typically means the default that the
DataSource is using or configured to use.
/**
   * The default isolation level. This typically means the default that the
   * DataSource is using or configured to use.
   */
  DEFAULT(-1);

  final int level;

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

  
Return the level as per java.sql.Connection.

Note that -1 denotes the default isolation level.

/**
   * Return the level as per java.sql.Connection.
   * <p>
   * Note that -1 denotes the default isolation level.
   * </p>
   */
  public int getLevel() {
    return level;
  }

  
Return the TxIsolation given the java.sql.Connection isolation level.

Note that -1 denotes the default isolation level.

/**
   * Return the TxIsolation given the java.sql.Connection isolation level.
   * <p>
   * Note that -1 denotes the default isolation level.
   * </p>
   */
  public static TxIsolation fromLevel(int connectionIsolationLevel) {

    switch (connectionIsolationLevel) {
      case Connection.TRANSACTION_READ_UNCOMMITTED:
        return TxIsolation.READ_UNCOMMITTED;

      case Connection.TRANSACTION_READ_COMMITTED:
        return TxIsolation.READ_COMMITED;

      case Connection.TRANSACTION_REPEATABLE_READ:
        return TxIsolation.REPEATABLE_READ;

      case Connection.TRANSACTION_SERIALIZABLE:
        return TxIsolation.SERIALIZABLE;

      case Connection.TRANSACTION_NONE:
        return TxIsolation.NONE;

      case -1:
        return TxIsolation.DEFAULT;

      default:
        throw new RuntimeException("Unknown isolation level " + connectionIsolationLevel);
    }

  }
}