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1   /*
2    *    Copyright 2009-2023 the original author or authors.
3    *
4    *    Licensed under the Apache License, Version 2.0 (the "License");
5    *    you may not use this file except in compliance with the License.
6    *    You may obtain a copy of the License at
7    *
8    *       https://www.apache.org/licenses/LICENSE-2.0
9    *
10   *    Unless required by applicable law or agreed to in writing, software
11   *    distributed under the License is distributed on an "AS IS" BASIS,
12   *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   *    See the License for the specific language governing permissions and
14   *    limitations under the License.
15   */
16  package org.apache.ibatis.executor.statement;
17  
18  import java.sql.Connection;
19  import java.sql.ResultSet;
20  import java.sql.SQLException;
21  import java.sql.Statement;
22  import java.util.List;
23  
24  import org.apache.ibatis.cursor.Cursor;
25  import org.apache.ibatis.executor.Executor;
26  import org.apache.ibatis.executor.keygen.Jdbc3KeyGenerator;
27  import org.apache.ibatis.executor.keygen.KeyGenerator;
28  import org.apache.ibatis.executor.keygen.SelectKeyGenerator;
29  import org.apache.ibatis.mapping.BoundSql;
30  import org.apache.ibatis.mapping.MappedStatement;
31  import org.apache.ibatis.mapping.ResultSetType;
32  import org.apache.ibatis.session.ResultHandler;
33  import org.apache.ibatis.session.RowBounds;
34  
35  /**
36   * @author Clinton Begin
37   */
38  public class SimpleStatementHandler extends BaseStatementHandler {
39  
40    public SimpleStatementHandler(Executor executor, MappedStatement mappedStatement, Object parameter,
41        RowBounds rowBounds, ResultHandler resultHandler, BoundSql boundSql) {
42      super(executor, mappedStatement, parameter, rowBounds, resultHandler, boundSql);
43    }
44  
45    @Override
46    public int update(Statement statement) throws SQLException {
47      String sql = boundSql.getSql();
48      Object parameterObject = boundSql.getParameterObject();
49      KeyGenerator keyGenerator = mappedStatement.getKeyGenerator();
50      int rows;
51      if (keyGenerator instanceof Jdbc3KeyGenerator) {
52        statement.execute(sql, Statement.RETURN_GENERATED_KEYS);
53        rows = statement.getUpdateCount();
54        keyGenerator.processAfter(executor, mappedStatement, statement, parameterObject);
55      } else if (keyGenerator instanceof SelectKeyGenerator) {
56        statement.execute(sql);
57        rows = statement.getUpdateCount();
58        keyGenerator.processAfter(executor, mappedStatement, statement, parameterObject);
59      } else {
60        statement.execute(sql);
61        rows = statement.getUpdateCount();
62      }
63      return rows;
64    }
65  
66    @Override
67    public void batch(Statement statement) throws SQLException {
68      String sql = boundSql.getSql();
69      statement.addBatch(sql);
70    }
71  
72    @Override
73    public <E> List<E> query(Statement statement, ResultHandler resultHandler) throws SQLException {
74      String sql = boundSql.getSql();
75      statement.execute(sql);
76      return resultSetHandler.handleResultSets(statement);
77    }
78  
79    @Override
80    public <E> Cursor<E> queryCursor(Statement statement) throws SQLException {
81      String sql = boundSql.getSql();
82      statement.execute(sql);
83      return resultSetHandler.handleCursorResultSets(statement);
84    }
85  
86    @Override
87    protected Statement instantiateStatement(Connection connection) throws SQLException {
88      if (mappedStatement.getResultSetType() == ResultSetType.DEFAULT) {
89        return connection.createStatement();
90      }
91      return connection.createStatement(mappedStatement.getResultSetType().getValue(), ResultSet.CONCUR_READ_ONLY);
92    }
93  
94    @Override
95    public void parameterize(Statement statement) {
96      // N/A
97    }
98  
99  }