/*
    * Copyright 2001-2004 The Apache Software Foundation.
    * 
    * 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 org.apache.juddi.datastore.jdbc;
  
  import java.sql.Connection;
  import java.sql.PreparedStatement;
  import java.sql.ResultSet;
  import java.util.Vector;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.juddi.datatype.Description;
  import org.apache.juddi.registry.RegistryEngine;
  import org.apache.juddi.util.Config;
  
  /***
   * @author Steve Viens (sviens@apache.org)
   */
  class TModelDescTable
  {
    // private reference to the jUDDI logger
    private static Log log = LogFactory.getLog(TModelDescTable.class);
  
    static String insertSQL = null;
    static String selectSQL = null;
    static String deleteSQL = null;
    static String tablePrefix = "";
    
    static
    {
     tablePrefix = Config.getStringProperty(
         RegistryEngine.PROPNAME_TABLE_PREFIX,RegistryEngine.DEFAULT_TABLE_PREFIX);
      // buffer used to build SQL statements
      StringBuffer sql = null;
  
      // build insertSQL
      sql = new StringBuffer(150);
      sql.append("INSERT INTO ").append(tablePrefix).append("TMODEL_DESCR (");
      sql.append("TMODEL_KEY,");
      sql.append("TMODEL_DESCR_ID,");
      sql.append("LANG_CODE,");
      sql.append("DESCR) ");
      sql.append("VALUES (?,?,?,?)");
      insertSQL = sql.toString();
  
      // build selectSQL
      sql = new StringBuffer(200);
      sql.append("SELECT ");
      sql.append("LANG_CODE,");
      sql.append("DESCR, ");
      sql.append("TMODEL_DESCR_ID ");
      sql.append("FROM ").append(tablePrefix).append("TMODEL_DESCR ");
      sql.append("WHERE TMODEL_KEY=? ");
      sql.append("ORDER BY TMODEL_DESCR_ID");
      selectSQL = sql.toString();
  
      // build deleteSQL
      sql = new StringBuffer(100);
      sql.append("DELETE FROM ").append(tablePrefix).append("TMODEL_DESCR ");
      sql.append("WHERE TMODEL_KEY=?");
      deleteSQL = sql.toString();
    }
  
    /***
     * Insert new row into the TMODEL_DESCR table.
     *
     * @param tModelKey BusinessKey to the BusinessEntity object that owns the Description to be inserted
     * @param descList Vector of Description objects holding values to be inserted
     * @param connection JDBC connection
     * @throws java.sql.SQLException
     */
    public static void insert(
      String tModelKey,
      Vector descList,
      Connection connection)
      throws java.sql.SQLException
    {
      if ((descList == null) || (descList.size() == 0))
        return; // everything is valid but no elements to insert
  
      PreparedStatement statement = null;
  
      try
      {
        statement = connection.prepareStatement(insertSQL);
        statement.setString(1, tModelKey.toString());
 
       int listSize = descList.size();
       for (int descID = 0; descID < listSize; descID++)
       {
         Description desc = (Description) descList.elementAt(descID);
 
         statement.setInt(2, descID);
         statement.setString(3, desc.getLanguageCode());
         statement.setString(4, desc.getValue());
 
         if (log.isDebugEnabled()) {
             log.debug(
               "insert into " + tablePrefix + "TMODEL_DESCR table:\n\n\t"
                 + insertSQL
                 + "\n\t TMODEL_KEY="
                 + tModelKey.toString()
                 + "\n\t TMODEL_DESCR_ID="
                 + descID
                 + "\n\t LANG_CODE="
                 + desc.getLanguageCode()
                 + "\n\t DESCR="
                 + desc.getValue()
                 + "\n");
         }
 
         statement.executeUpdate();
       }
     }
     finally
     {
       try
       {
         statement.close();
       }
       catch (Exception e)
       { /* ignored */
       }
     }
   }
 
   /***
    * Select all rows from the TMODEL_DESCR table for a given TModelKey.
    *
    * @param  tModelKey String
    * @param  connection JDBC connection
    * @throws java.sql.SQLException
    */
   public static Vector select(String tModelKey, Connection connection)
     throws java.sql.SQLException
   {
     Vector descList = new Vector();
     PreparedStatement statement = null;
     ResultSet resultSet = null;
 
     try
     {
       // create a statement to query with
       statement = connection.prepareStatement(selectSQL);
       statement.setString(1, tModelKey.toString());
 
       if (log.isDebugEnabled()) {
           log.debug(
             "select from " + tablePrefix + "TMODEL_DESCR table:\n\n\t"
               + selectSQL
               + "\n\t TMODEL_KEY="
               + tModelKey.toString()
               + "\n");
       }
 
       // execute the statement
       resultSet = statement.executeQuery();
       while (resultSet.next())
       {
         Description desc = new Description();
         desc.setLanguageCode(resultSet.getString(1));//("LANG_CODE"));
         desc.setValue(resultSet.getString(2));//("DESCR"));
         descList.add(desc);
       }
 
       return descList;
     }
     finally
     {
       try
       {
         resultSet.close();
         statement.close();
       }
       catch (Exception e)
       { /* ignored */
       }
     }
   }
 
   /***
    * Delete multiple rows from the TMODEL_DESCR table that are assigned to the
    * TModelKey specified.
    *
    * @param  tModelKey String
    * @param  connection JDBC connection
    * @throws java.sql.SQLException
    */
   public static void delete(String tModelKey, Connection connection)
     throws java.sql.SQLException
   {
     PreparedStatement statement = null;
 
     try
     {
       // prepare the delete
       statement = connection.prepareStatement(deleteSQL);
       statement.setString(1, tModelKey.toString());
 
       if (log.isDebugEnabled()) {
           log.debug(
             "delete from " + tablePrefix + "TMODEL_DESCR table:\n\n\t"
               + deleteSQL
               + "\n\t TMODEL_KEY="
               + tModelKey.toString()
               + "\n");
       }
 
       // execute
       statement.executeUpdate();
     }
     finally
     {
       try
       {
         statement.close();
       }
       catch (Exception e)
       { /* ignored */
       }
     }
   }
 }