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Java > Open Source Codes > org > xquark > xquery > parser > XQueryUnaryOperatorExpression


1 /*
2  * This file belongs to the XQuark distribution.
3  * Copyright (C) 2003 Universite de Versailles Saint-Quentin.
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307.
18  * You can also get it at http://www.gnu.org/licenses/lgpl.html
19  *
20  * For more information on this software, see http://www.xquark.org.
21  */
22
23
24 package org.xquark.xquery.parser;
25
26
27 public abstract class XQueryUnaryOperatorExpression extends XQueryExpression {
28     private static final String JavaDoc RCSRevision = "$Revision: 1.4 $";
29     private static final String JavaDoc RCSName = "$Name: $";
30     
31     // cannot be null
32 protected XQueryExpression expression = null;
33     
34     // #############################################################################
35 // VISITOR STUFF
36 // #############################################################################
37
38     public void accept(ParserVisitor visitor) throws XQueryException {
39         visitor.visit(this);
40     }
41     
42     // #############################################################################
43 // CONSTRUCTOR STUFF
44 // #############################################################################
45
46     public XQueryUnaryOperatorExpression(XQueryExpression expression) throws XQueryException {
47         setExpression(expression);
48     }
49     
50     // #############################################################################
51 // ATTRIBUTES ACCESS STUFF
52 // #############################################################################
53
54     public XQueryExpression getExpression() { return expression; }
55     public void setExpression(XQueryExpression expression) throws XQueryException {
56         if (expression == null) throw new XQueryException("expression of XQueryUnaryOperatorExpression cannot be null");
57         this.expression = expression;
58         this.expression.setParentExpression(this);
59     }
60     
61     // #############################################################################
62 // CLONE STUFF
63 // #############################################################################
64 public void addParentExpression(XQueryExpression parentExpression) {
65         addParentExpression(parentExpression) ;
66         if (expression != null) expression.addParentExpression(parentExpression);
67     }
68         
69 }
70
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