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/*
 *  Copyright 2004 Clinton Begin
 *
 *  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.ibatis.common.jdbc.exception;



import java.sql.SQLException;

/**
 * Unchecked exception to allow passing an Exception with the original SQLException 
 */
public class RuntimeSQLException extends RuntimeException {

  /**
   * Default constructor
   */
  public RuntimeSQLException() {
  }

  /**
   * Constructor to pass along a message
   * @param msg - the message
   */
  public RuntimeSQLException(String msg) {
    super(msg);
  }

  /**
   * Constructor to pass along another exception
   * @param sqlException - the exception
   */
  public RuntimeSQLException(SQLException sqlException) {
    super(sqlException);
  }

  /**
   * Constructor to pass along a message and an exception
   * @param msg - the message
   * @param sqlException - the exception
   */
  public RuntimeSQLException(String msg, SQLException sqlException) {
    super(msg, sqlException);
  }

  /**
   * Getter for the SQL State
   * @return - the state
   */
  public String getSQLState() {
    Throwable cause = getCause();
    if (cause instanceof SQLException) {
      return ((SQLException) cause).getSQLState();
    } else {
      return null;
    }

  }

  /**
   * Getter for the error code
   * @return - the error code
   */
  public int getErrorCode() {
    Throwable cause = getCause();
    if (cause instanceof SQLException) {
      return ((SQLException) cause).getErrorCode();
    } else {
      return -1;
    }
  }

  /**
   * Get the next exception in the chain
   * @return - the next exception
   */
  public SQLException getNextException() {
    Throwable cause = getCause();
    if (cause instanceof SQLException) {
      return ((SQLException) cause).getNextException();
    } else {
      return null;
    }
  }

  /**
   * Set the next exception in the chain
   * @param ex - the next exception
   */
  public synchronized void setNextException(SQLException ex) {
    Throwable cause = getCause();
    if (cause instanceof SQLException) {
      ((SQLException) cause).setNextException(ex);
    }
  }

}