01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one
03: * or more contributor license agreements. See the NOTICE file
04: * distributed with this work for additional information
05: * regarding copyright ownership. The ASF licenses this file
06: * to you under the Apache License, Version 2.0 (the
07: * "License"); you may not use this file except in compliance
08: * with the License. You may obtain a copy of the License at
09: *
10: * http://www.apache.org/licenses/LICENSE-2.0
11: *
12: * Unless required by applicable law or agreed to in writing,
13: * software distributed under the License is distributed on an
14: * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15: * KIND, either express or implied. See the License for the
16: * specific language governing permissions and limitations
17: * under the License.
18: */
19: package org.apache.openjpa.jdbc.kernel;
20:
21: import java.sql.SQLException;
22:
23: import org.apache.openjpa.jdbc.meta.ClassMapping;
24: import org.apache.openjpa.jdbc.sql.Result;
25: import org.apache.openjpa.jdbc.sql.Select;
26: import org.apache.openjpa.jdbc.sql.SelectExecutor;
27:
28: /**
29: * Object provider implementation wrapped around a {@link Select}.
30: *
31: * @author Abe White
32: * @nojavadoc
33: */
34: public class InstanceResultObjectProvider extends
35: SelectResultObjectProvider {
36:
37: private final ClassMapping _mapping;
38:
39: /**
40: * Constructor.
41: *
42: * @param sel the select to execute
43: * @param mapping the mapping for the base class of the result objects
44: * @param store the store to delegate loading to
45: * @param fetch the fetch configuration, or null for default
46: */
47: public InstanceResultObjectProvider(SelectExecutor sel,
48: ClassMapping mapping, JDBCStore store,
49: JDBCFetchConfiguration fetch) {
50: super (sel, store, fetch);
51: _mapping = mapping;
52: }
53:
54: public Object getResultObject() throws SQLException {
55: Result res = getResult();
56: ClassMapping mapping = res.getBaseMapping();
57: if (mapping == null)
58: mapping = _mapping;
59: return res.load(mapping, getStore(), getFetchConfiguration());
60: }
61: }
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