/*
    *    Copyright 2016-2025 the original author or authors.
    *
    *    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
    *
    *       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 examples.array;
  
  import java.sql.Array;
  import java.sql.CallableStatement;
  import java.sql.PreparedStatement;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  import java.util.Arrays;
  import java.util.List;
  
  import org.apache.ibatis.type.BaseTypeHandler;
  import org.apache.ibatis.type.JdbcType;
  
  public class StringArrayTypeHandler extends BaseTypeHandler<String[]> {
      @Override
      public void setNonNullParameter(PreparedStatement ps, int i, String[] parameter, JdbcType jdbcType) throws SQLException {
          Array array = ps.getConnection().createArrayOf("VARCHAR", parameter);
          ps.setArray(i, array);
          array.free();
      }
  
      @Override
      public String[] getNullableResult(ResultSet rs, String columnName) throws SQLException {
          Array array = rs.getArray(columnName);
          return extractArray(array);
      }
  
      @Override
      public String[] getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
          Array array = rs.getArray(columnIndex);
          return extractArray(array);
      }
  
      @Override
      public String[] getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
          Array array = cs.getArray(columnIndex);
          return extractArray(array);
      }
  
      private String[] extractArray(Array array) throws SQLException {
          Object[] objArray = (Object[]) array.getArray();
          array.free();
  
          List<String> stringList = Arrays.stream(objArray)
                  .map(Object::toString)
                  .toList();
  
          String[] stringArray = new String[stringList.size()];
          return stringList.toArray(stringArray);
      }
  }