/*
 * 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.log4j.db;

import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Set;

import org.apache.log4j.spi.LoggingEvent;

/**
 * @author Ceki G&uuml;lc&uuml;
 *
 */
public class DBHelper {
  
  public final static short PROPERTIES_EXIST = 0x01;
  public final static short EXCEPTION_EXISTS = 0x02;
  
  public  static short computeReferenceMask(LoggingEvent event) {
    short mask = 0;
    Set propertiesKeys = event.getPropertyKeySet();
    if(propertiesKeys.size() > 0) {
      mask = PROPERTIES_EXIST;
    }
    String[] strRep = event.getThrowableStrRep();
    if(strRep != null) {
      mask |= EXCEPTION_EXISTS;
    }
    return mask;
  }
  
  static public void closeConnection(Connection connection) {
    if(connection != null) {
      try { 
        connection.close();
      } catch(SQLException sqle) {
        // static utility classes should not log without an explicit repository
        // reference
      }
    }
  }
  
  public static void closeStatement(Statement statement) {
    if(statement != null) {
      try {
        statement.close();
      } catch(SQLException sqle) {
      }
    }
  }
}