01: /*
02: * Copyright 2002-2005 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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.araneaframework.backend.list.helper;
18:
19: import java.util.List;
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: */
36: public interface ResultReader extends RowCallbackHandler {
37:
38: /**
39: * Return all results, disconnected from the JDBC ResultSet.
40: * Never returns null; returns the empty collection if there
41: * were no results.
42: */
43: List getResults();
44: }
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