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.meta;
20:
21: import org.apache.openjpa.jdbc.sql.Joins;
22: import org.apache.openjpa.jdbc.sql.Select;
23: import org.apache.openjpa.meta.Order;
24:
25: /**
26: * Order in the datastore using JDBC.
27: *
28: * @author Abe White
29: */
30: interface JDBCOrder extends Order {
31:
32: /**
33: * Whether the value is a member of the field's related type, rather than
34: * columns of the field itself.
35: */
36: public boolean isInRelation();
37:
38: /**
39: * Order by this value.
40: *
41: * @param elem if this value has independent mappings, the mapping
42: * we're selecting
43: */
44: public void order(Select sel, ClassMapping elem, Joins joins);
45: }
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