/*
    *    Copyright 2009-2021 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
    *
    *       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.ibatis.type;
  
  import java.sql.CallableStatement;
  import java.sql.PreparedStatement;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  
  import org.apache.ibatis.executor.result.ResultMapException;
  import org.apache.ibatis.session.Configuration;
  
  /**
   * The base {@link TypeHandler} for references a generic type.
   * <p>
   * Important: Since 3.5.0, This class never call the {@link ResultSet#wasNull()} and
   * {@link CallableStatement#wasNull()} method for handling the SQL {@code NULL} value.
   * In other words, {@code null} value handling should be performed on subclass.
   * </p>
   *
   * @author Clinton Begin
   * @author Simone Tripodi
   * @author Kzuki Shimizu
   */
  public abstract class BaseTypeHandler<T> extends TypeReference<T> implements TypeHandler<T> {
  
    /**
     * @deprecated Since 3.5.0 - See https://github.com/mybatis/mybatis-3/issues/1203. This field will remove future.
     */
    @Deprecated
    protected Configuration configuration;
  
    /**
     * Sets the configuration.
     *
     * @param c
     *          the new configuration
     * @deprecated Since 3.5.0 - See https://github.com/mybatis/mybatis-3/issues/1203. This property will remove future.
     */
    @Deprecated
    public void setConfiguration(Configuration c) {
      this.configuration = c;
    }
  
    @Override
    public void setParameter(PreparedStatement ps, int i, T parameter, JdbcType jdbcType) throws SQLException {
      if (parameter == null) {
        if (jdbcType == null) {
          throw new TypeException("JDBC requires that the JdbcType must be specified for all nullable parameters.");
        }
        try {
          ps.setNull(i, jdbcType.TYPE_CODE);
        } catch (SQLException e) {
          throw new TypeException("Error setting null for parameter #" + i + " with JdbcType " + jdbcType + " . "
                + "Try setting a different JdbcType for this parameter or a different jdbcTypeForNull configuration property. "
                + "Cause: " + e, e);
        }
      } else {
        try {
          setNonNullParameter(ps, i, parameter, jdbcType);
        } catch (Exception e) {
          throw new TypeException("Error setting non null for parameter #" + i + " with JdbcType " + jdbcType + " . "
                + "Try setting a different JdbcType for this parameter or a different configuration property. "
                + "Cause: " + e, e);
        }
      }
    }
  
    @Override
    public T getResult(ResultSet rs, String columnName) throws SQLException {
      try {
        return getNullableResult(rs, columnName);
      } catch (Exception e) {
        throw new ResultMapException("Error attempting to get column '" + columnName + "' from result set.  Cause: " + e, e);
      }
    }
  
    @Override
    public T getResult(ResultSet rs, int columnIndex) throws SQLException {
      try {
        return getNullableResult(rs, columnIndex);
      } catch (Exception e) {
        throw new ResultMapException("Error attempting to get column #" + columnIndex + " from result set.  Cause: " + e, e);
      }
    }
  
   @Override
   public T getResult(CallableStatement cs, int columnIndex) throws SQLException {
     try {
       return getNullableResult(cs, columnIndex);
     } catch (Exception e) {
       throw new ResultMapException("Error attempting to get column #" + columnIndex + " from callable statement.  Cause: " + e, e);
     }
   }
 
   public abstract void setNonNullParameter(PreparedStatement ps, int i, T parameter, JdbcType jdbcType) throws SQLException;
 
   /**
    * Gets the nullable result.
    *
    * @param rs
    *          the rs
    * @param columnName
    *          Column name, when configuration <code>useColumnLabel</code> is <code>false</code>
    * @return the nullable result
    * @throws SQLException
    *           the SQL exception
    */
   public abstract T getNullableResult(ResultSet rs, String columnName) throws SQLException;
 
   public abstract T getNullableResult(ResultSet rs, int columnIndex) throws SQLException;
 
   public abstract T getNullableResult(CallableStatement cs, int columnIndex) throws SQLException;
 
 }