content: /*****************************************************************
   *   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
   *
   *    https://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.cayenne.test.jdbc;
  
  import java.sql.ResultSet;
  import java.sql.SQLException;
  
  /**
   * A JDBC template for reading a single row from the database.
   */
  abstract class RowTemplate<T> extends ResultSetTemplate<T> {
  
      public RowTemplate(DBHelper parent) {
          super(parent);
      }
  
      abstract T readRow(ResultSet rs, String sql) throws SQLException;
  
      @Override
      T readResultSet(ResultSet rs, String sql) throws SQLException {
          if (rs.next()) {
  
              T row = readRow(rs, sql);
  
              if (rs.next()) {
                  throw new SQLException("More than one result for sql: " + sql);
              }
  
              return row;
          }
          else {
              throw new SQLException("No results for sql: " + sql);
          }
      }
  }
  