1 package org.apache.torque.criteria;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21 /**
22 *
23 * The possible explicit join types.
24 *
25 * @version $Id: JoinType.java 1331333 2012-04-27 10:13:10Z tfischer $
26 */
27 public enum JoinType
28 {
29 /** SQL Expression " LEFT JOIN ". */
30 LEFT_JOIN(" LEFT JOIN "),
31 /** SQL Expression " RIGHT JOIN ". */
32 RIGHT_JOIN(" RIGHT JOIN "),
33 /** SQL Expression " INNER JOIN ". */
34 INNER_JOIN(" INNER JOIN ");
35
36 /** The SQL expression for the join type. */
37 private String sql;
38
39 /**
40 * Constructor.
41 *
42 * @param sql The SQL expression for the join type.
43 */
44 private JoinType(String sql)
45 {
46 this.sql = sql;
47 }
48
49 /**
50 * Returns the SQL expression for the join type.
51 *
52 * @return the SQL expression, not null.
53 */
54 public String toString()
55 {
56 return sql;
57 }
58
59 }