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Java > Open Source Codes > org > springframework > jdbc > core > ResultReader


1 /*
2  * Copyright 2002-2005 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  * http://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
17 package org.springframework.jdbc.core;
18
19 import java.util.List JavaDoc;
20
21 /**
22  * Extension of RowCallbackHandler interface that saves the accumulated results
23  * as a List.
24  *
25  * <p>Allows to make a results list available in a uniform manner. JdbcTemplate's
26  * query methods will return the results list in that case, else returning null
27  * (-> result state is solely available from RowCallbackHandler object).
28  *
29  * <p>A convenient out-of-the-box implementation of ResultReader is the
30  * RowMapperResultReader adapter which delegates row mapping to a RowMapper.
31  * Note that a RowMapper object is typically stateless and thus reusable;
32  * just the RowMapperResultReader adapter is stateful.
33  *
34  * @author Rod Johnson
35  * @see RowMapperResultReader
36  */

37 public interface ResultReader extends RowCallbackHandler {
38      
39     /**
40      * Return all results, disconnected from the JDBC ResultSet.
41      * Never returns null; returns the empty collection if there
42      * were no results.
43      */

44     List JavaDoc getResults();
45
46 }
47
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