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 }