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Java > Open Source Codes > org > objectweb > medor > expression > lib > BasicUnaryOperator


1 /**
2  * MEDOR: Middleware Enabling Distributed Object Requests
3  *
4  * Copyright (C) 2001-2003 France Telecom R&D
5  * Contact: alexandre.lefebvre@rd.francetelecom.com
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this library; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  *
21  * Initial developers: M. Alia, A. Lefebvre
22  */
23
24 package org.objectweb.medor.expression.lib;
25
26 import org.objectweb.medor.expression.api.Expression;
27 import org.objectweb.medor.expression.api.UnaryOperator;
28 import org.objectweb.jorm.type.api.PType;
29
30 /**
31  *
32  * @author Sebastien Chassande-Barrioz
33  */
34 public abstract class BasicUnaryOperator extends BasicOperator
35         implements UnaryOperator {
36
37     public BasicUnaryOperator() {
38         super(new Expression[1]);
39     }
40
41     public BasicUnaryOperator(PType type) {
42         super(type, new Expression[1]);
43     }
44
45     public BasicUnaryOperator(Expression e) {
46         super(new Expression[]{e});
47     }
48
49     public BasicUnaryOperator(PType type, Expression e) {
50         super(type, new Expression[]{e});
51     }
52
53     // IMPLEMENTATION OF THE Operator INTERFACE //
54 //------------------------------------------//
55
56     public int getOperandNumber() {
57         return 1;
58     }
59
60     public Expression getExpression(int idx)
61         throws ArrayIndexOutOfBoundsException JavaDoc {
62         if (idx == 0)
63             return getExpression();
64         else
65             throw new ArrayIndexOutOfBoundsException JavaDoc(idx);
66     }
67
68     public void setExpression(int idx, Expression exp)
69         throws ArrayIndexOutOfBoundsException JavaDoc{
70         if (idx == 0)
71             setExpression(exp);
72         else
73             throw new ArrayIndexOutOfBoundsException JavaDoc(idx);
74     }
75
76     // IMPLEMENTATION OF THE UaryOperator INTERFACE //
77 //------------------------------------------------//
78
79     public void setExpression(Expression e) throws IllegalStateException JavaDoc {
80         if (!verified){
81             expressions[0] = e;
82         }
83         else
84             throw new IllegalStateException JavaDoc("Compiled expression can't be modified");
85     }
86
87     public Expression getExpression() {
88         return expressions[0];
89     }
90
91 }
92
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