1 /*
2 * ModeShape (http://www.modeshape.org)
3 * See the COPYRIGHT.txt file distributed with this work for information
4 * regarding copyright ownership. Some portions may be licensed
5 * to Red Hat, Inc. under one or more contributor license agreements.
6 * See the AUTHORS.txt file in the distribution for a full listing of
7 * individual contributors.
8 *
9 * ModeShape is free software. Unless otherwise indicated, all code in ModeShape
10 * is licensed to you under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation; either version 2.1 of
12 * the License, or (at your option) any later version.
13 *
14 * ModeShape is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this software; if not, write to the Free
21 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
23 */
24 package org.modeshape.jcr.query.qom;
25
26 import javax.jcr.query.qom.JoinCondition;
27 import org.modeshape.graph.query.model.Join;
28 import org.modeshape.graph.query.model.JoinType;
29 import org.modeshape.jcr.api.query.qom.QueryObjectModelConstants;
30
31 /**
32 * Implementation of the join for the JCR Query Object Model and the Graph API.
33 */
34 public class JcrJoin extends Join implements javax.jcr.query.qom.Join, JcrSource {
35
36 private static final long serialVersionUID = 1L;
37
38 /**
39 * Create a join of the left and right sources, using the supplied join condition. The outputs of the left and right sources
40 * are expected to be equivalent.
41 *
42 * @param left the left source being joined
43 * @param type the type of join
44 * @param right the right source being joined
45 * @param joinCondition the join condition
46 */
47 public JcrJoin( JcrSource left,
48 JoinType type,
49 JcrSource right,
50 JcrJoinCondition joinCondition ) {
51 super(left, type, right, joinCondition);
52 }
53
54 /**
55 * {@inheritDoc}
56 *
57 * @see org.modeshape.graph.query.model.Join#joinCondition()
58 */
59 @Override
60 public JcrJoinCondition joinCondition() {
61 return (JcrJoinCondition)super.joinCondition();
62 }
63
64 /**
65 * {@inheritDoc}
66 *
67 * @see org.modeshape.graph.query.model.Join#left()
68 */
69 @Override
70 public JcrSource left() {
71 return (JcrSource)super.left();
72 }
73
74 /**
75 * {@inheritDoc}
76 *
77 * @see org.modeshape.graph.query.model.Join#right()
78 */
79 @Override
80 public JcrSource right() {
81 return (JcrSource)super.right();
82 }
83
84 /**
85 * {@inheritDoc}
86 *
87 * @see javax.jcr.query.qom.Join#getJoinCondition()
88 */
89 @Override
90 public JoinCondition getJoinCondition() {
91 return joinCondition();
92 }
93
94 /**
95 * {@inheritDoc}
96 *
97 * @see javax.jcr.query.qom.Join#getJoinType()
98 */
99 @Override
100 public String getJoinType() {
101 switch (type()) {
102 case CROSS:
103 return QueryObjectModelConstants.JCR_JOIN_TYPE_CROSS;
104 case INNER:
105 return QueryObjectModelConstants.JCR_JOIN_TYPE_INNER;
106 case FULL_OUTER:
107 return QueryObjectModelConstants.JCR_JOIN_TYPE_FULL_OUTER;
108 case LEFT_OUTER:
109 return QueryObjectModelConstants.JCR_JOIN_TYPE_LEFT_OUTER;
110 case RIGHT_OUTER:
111 return QueryObjectModelConstants.JCR_JOIN_TYPE_RIGHT_OUTER;
112 }
113 assert false;
114 return null;
115 }
116
117 /**
118 * {@inheritDoc}
119 *
120 * @see javax.jcr.query.qom.Join#getLeft()
121 */
122 @Override
123 public JcrSource getLeft() {
124 return left();
125 }
126
127 /**
128 * {@inheritDoc}
129 *
130 * @see javax.jcr.query.qom.Join#getRight()
131 */
132 @Override
133 public JcrSource getRight() {
134 return right();
135 }
136 }