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.graph.query.model;
25
26 import net.jcip.annotations.Immutable;
27 import org.modeshape.common.util.ObjectUtil;
28
29 /**
30 *
31 */
32 @Immutable
33 public class NamedSelector extends Selector {
34 private static final long serialVersionUID = 1L;
35
36 /**
37 * Create a selector with a name.
38 *
39 * @param name the name for this selector
40 * @throws IllegalArgumentException if the selector name is null
41 */
42 public NamedSelector( SelectorName name ) {
43 super(name);
44 }
45
46 /**
47 * Create a selector with the supplied name and alias.
48 *
49 * @param name the name for this selector
50 * @param alias the alias for this selector; may be null
51 * @throws IllegalArgumentException if the selector name is null
52 */
53 public NamedSelector( SelectorName name,
54 SelectorName alias ) {
55 super(name, alias);
56 }
57
58 /**
59 * {@inheritDoc}
60 *
61 * @see java.lang.Object#toString()
62 */
63 @Override
64 public String toString() {
65 return Visitors.readable(this);
66 }
67
68 /**
69 * {@inheritDoc}
70 *
71 * @see java.lang.Object#hashCode()
72 */
73 @Override
74 public int hashCode() {
75 return getName().hashCode();
76 }
77
78 /**
79 * {@inheritDoc}
80 *
81 * @see java.lang.Object#equals(java.lang.Object)
82 */
83 @Override
84 public boolean equals( Object obj ) {
85 if (obj == this) return true;
86 if (obj instanceof Selector) {
87 Selector that = (Selector)obj;
88 if (!this.getName().equals(that.getName())) return false;
89 if (!ObjectUtil.isEqualWithNulls(this.getAlias(), that.getAlias())) return false;
90 return true;
91 }
92 return false;
93 }
94
95 /**
96 * {@inheritDoc}
97 *
98 * @see org.modeshape.graph.query.model.Visitable#accept(org.modeshape.graph.query.model.Visitor)
99 */
100 public void accept( Visitor visitor ) {
101 visitor.visit(this);
102 }
103 }