/*

  * This file is part of dependency-check-core.

  *

  * 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.

  *

  * Copyright (c) 2013 Jeremy Long. All Rights Reserved.

  */

 package org.owasp.dependencycheck.utils;

 import java.sql.PreparedStatement;

 import java.sql.ResultSet;

 import java.sql.SQLException;

 import java.sql.Statement;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 import org.owasp.dependencycheck.data.nvdcve.DatabaseException;

 /**

  *

  * @author Jeremy Long <jeremy.long@owasp.org>

  */

 public final class DBUtils {

     /**

      * The logger.

      */

     private static final Logger LOGGER = Logger.getLogger(DBUtils.class.getName());

     /**

      * Private constructor for a utility class.

      */

     private DBUtils() {

     }

     /**

      * Returns the generated integer primary key for a newly inserted row.

      *

      * @param statement a prepared statement that just executed an insert

      * @return a primary key

      * @throws DatabaseException thrown if there is an exception obtaining the key

      */

     public static int getGeneratedKey(PreparedStatement statement) throws DatabaseException {

         ResultSet rs = null;

         int id = 0;

         try {

             rs = statement.getGeneratedKeys();

             if (!rs.next()) {

                 throw new DatabaseException("Unable to get primary key for inserted row");

             }

             id = rs.getInt(1);

         } catch (SQLException ex) {

             throw new DatabaseException("Unable to get primary key for inserted row");

         } finally {

             closeResultSet(rs);

         }

         return id;

     }

     /**

      * Closes the given statement object ignoring any exceptions that occur.

      *

      * @param statement a Statement object

      */

     public static void closeStatement(Statement statement) {

         if (statement != null) {

             try {

                 statement.close();

             } catch (SQLException ex) {

                 LOGGER.log(Level.FINEST, statement.toString(), ex);

             }

         }

     }

     /**

      * Closes the result set capturing and ignoring any SQLExceptions that occur.

      *

      * @param rs a ResultSet to close

      */

     public static void closeResultSet(ResultSet rs) {

         if (rs != null) {

             try {

                 rs.close();

             } catch (SQLException ex) {

                 LOGGER.log(Level.FINEST, rs.toString(), ex);

             }

         }

     }

 }