/**
    *    Copyright 2009-2015 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.executor.statement;
  
  import java.sql.Connection;
  import java.sql.PreparedStatement;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  import java.sql.Statement;
  import java.util.List;
  
  import org.apache.ibatis.executor.Executor;
  import org.apache.ibatis.executor.keygen.Jdbc3KeyGenerator;
  import org.apache.ibatis.executor.keygen.KeyGenerator;
  import org.apache.ibatis.mapping.BoundSql;
  import org.apache.ibatis.mapping.MappedStatement;
  import org.apache.ibatis.session.ResultHandler;
  import org.apache.ibatis.session.RowBounds;
  
  /**
   * @author Clinton Begin
   */
  public class PreparedStatementHandler extends BaseStatementHandler {
  
    public PreparedStatementHandler(Executor executor, MappedStatement mappedStatement, Object parameter, RowBounds rowBounds, ResultHandler resultHandler, BoundSql boundSql) {
      super(executor, mappedStatement, parameter, rowBounds, resultHandler, boundSql);
    }
  
    @Override
    public int update(Statement statement) throws SQLException {
      PreparedStatement ps = (PreparedStatement) statement;
      ps.execute();
      int rows = ps.getUpdateCount();
      Object parameterObject = boundSql.getParameterObject();
      KeyGenerator keyGenerator = mappedStatement.getKeyGenerator();
      keyGenerator.processAfter(executor, mappedStatement, ps, parameterObject);
      return rows;
    }
  
    @Override
    public void batch(Statement statement) throws SQLException {
      PreparedStatement ps = (PreparedStatement) statement;
      ps.addBatch();
    }
  
    @Override
    public <E> List<E> query(Statement statement, ResultHandler resultHandler) throws SQLException {
      PreparedStatement ps = (PreparedStatement) statement;
      ps.execute();
      return resultSetHandler.<E> handleResultSets(ps);
    }
  
    @Override
    protected Statement instantiateStatement(Connection connection) throws SQLException {
      String sql = boundSql.getSql();
      if (mappedStatement.getKeyGenerator() instanceof Jdbc3KeyGenerator) {
        String[] keyColumnNames = mappedStatement.getKeyColumns();
        if (keyColumnNames == null) {
          return connection.prepareStatement(sql, PreparedStatement.RETURN_GENERATED_KEYS);
        } else {
          return connection.prepareStatement(sql, keyColumnNames);
        }
      } else if (mappedStatement.getResultSetType() != null) {
        return connection.prepareStatement(sql, mappedStatement.getResultSetType().getValue(), ResultSet.CONCUR_READ_ONLY);
      } else {
        return connection.prepareStatement(sql);
      }
    }
  
    @Override
    public void parameterize(Statement statement) throws SQLException {
      parameterHandler.setParameters((PreparedStatement) statement);
    }
  
  }