/*
    * 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.KeyedReference;
  import org.apache.juddi.registry.RegistryEngine;
  import org.apache.juddi.util.Config;
  
  /***
   * @author Steve Viens (sviens@apache.org)
   */
  class ServiceCategoryTable
  {
    // private reference to the jUDDI logger
    private static Log log = LogFactory.getLog(ServiceCategoryTable.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("SERVICE_CATEGORY (");
      sql.append("SERVICE_KEY,");
      sql.append("CATEGORY_ID,");
      sql.append("TMODEL_KEY_REF,");
      sql.append("KEY_NAME,");
      sql.append("KEY_VALUE) ");
      sql.append("VALUES (?,?,?,?,?)");
      insertSQL = sql.toString();
  
      // build selectSQL
      sql = new StringBuffer(200);
      sql.append("SELECT ");
      sql.append("TMODEL_KEY_REF,");
      sql.append("KEY_NAME,");
      sql.append("KEY_VALUE, ");
      sql.append("CATEGORY_ID ");
      sql.append("FROM ").append(tablePrefix).append("SERVICE_CATEGORY ");
      sql.append("WHERE SERVICE_KEY=? ");
      sql.append("ORDER BY CATEGORY_ID");
      selectSQL = sql.toString();
  
      // build deleteSQL
      sql = new StringBuffer(100);
      sql.append("DELETE FROM ").append(tablePrefix).append("SERVICE_CATEGORY ");
      sql.append("WHERE SERVICE_KEY=?");
      deleteSQL = sql.toString();
    }
  
    /***
     * Insert new row into the SERVICE_CATEGORY table.
     *
     * @param serviceKey String to the parent BusinessService object.
     * @param keyRefs A Vector of KeyedReference instances to insert.
     * @param connection JDBC connection
     * @throws java.sql.SQLException
     */
    public static void insert(
      String serviceKey,
      Vector keyRefs,
      Connection connection)
      throws java.sql.SQLException
    {
      PreparedStatement statement = null;
  
      try
      {
        statement = connection.prepareStatement(insertSQL);
        statement.setString(1, serviceKey.toString());
  
       int listSize = keyRefs.size();
       for (int categoryID = 0; categoryID < listSize; categoryID++)
       {
         KeyedReference keyRef = (KeyedReference) keyRefs.elementAt(categoryID);
 
         // extract values to insert
         String tModelKeyValue = null;
         if (keyRef.getTModelKey() != null)
           tModelKeyValue = keyRef.getTModelKey().toString();
 
         // set the values
         statement.setInt(2, categoryID);
         statement.setString(3, tModelKeyValue);
         statement.setString(4, keyRef.getKeyName());
         statement.setString(5, keyRef.getKeyValue());
 
         if (log.isDebugEnabled()) {
             log.debug(
               "insert into " + tablePrefix + "SERVICE_CATEGORY table:\n\n\t"
                 + insertSQL
                 + "\n\t SERVICE_KEY="
                 + serviceKey.toString()
                 + "\n\t CATEGORY_ID="
                 + categoryID
                 + "\n\t TMODEL_KEY_REF="
                 + tModelKeyValue
                 + "\n\t KEY_NAME="
                 + keyRef.getKeyName()
                 + "\n\t KEY_VALUE="
                 + keyRef.getKeyValue()
                 + "\n");
         }
 
         // insert
         statement.executeUpdate();
       }
     }
     finally
     {
       try
       {
         statement.close();
       }
       catch (Exception e)
       { /* ignored */
       }
     }
   }
 
   /***
    * Select all rows from the SERVICE_CATEGORY table for a given ServiceKey.
    *
    * @param  serviceKey String
    * @param  connection JDBC connection
    * @throws java.sql.SQLException
    */
   public static Vector select(String serviceKey, Connection connection)
     throws java.sql.SQLException
   {
     Vector keyRefList = new Vector();
     PreparedStatement statement = null;
     ResultSet resultSet = null;
 
     try
     {
       // create a statement to query with
       statement = connection.prepareStatement(selectSQL);
       statement.setString(1, serviceKey.toString());
 
       if (log.isDebugEnabled()) {
           log.debug(
             "select from " + tablePrefix + "SERVICE_CATEGORY table:\n\n\t"
               + selectSQL
               + "\n\t SERVICE_KEY="
               + serviceKey.toString()
               + "\n");
       }
 
       // execute the statement
       resultSet = statement.executeQuery();
       while (resultSet.next())
       {
         KeyedReference keyRef = new KeyedReference();
         keyRef.setTModelKey(resultSet.getString(1));//("TMODEL_KEY_REF"));
         keyRef.setKeyName(resultSet.getString(2));//("KEY_NAME"));
         keyRef.setKeyValue(resultSet.getString(3));//("KEY_VALUE"));
         keyRefList.add(keyRef);
       }
 
       return keyRefList;
     }
     finally
     {
       try
       {
         resultSet.close();
         statement.close();
       }
       catch (Exception e)
       { /* ignored */
       }
     }
   }
 
   /***
    * Delete multiple rows from the SERVICE_CATEGORY table that are assigned to the
    * ServiceKey specified.
    *
    * @param  serviceKey String
    * @param  connection JDBC connection
    * @throws java.sql.SQLException
    */
   public static void delete(String serviceKey, Connection connection)
     throws java.sql.SQLException
   {
     PreparedStatement statement = null;
 
     try
     {
       // prepare the delete
       statement = connection.prepareStatement(deleteSQL);
       statement.setString(1, serviceKey.toString());
 
       if (log.isDebugEnabled()) {
           log.debug(
             "delete from " + tablePrefix + "SERVICE_CATEGORY table:\n\n\t"
               + deleteSQL
               + "\n\t SERVICE_KEY="
               + serviceKey.toString()
               + "\n");
       }
 
       // execute
       statement.executeUpdate();
     }
     finally
     {
       try
       {
         statement.close();
       }
       catch (Exception e)
       { /* ignored */
       }
     }
   }
 }