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Java > Open Source Codes > jode > expr > StringAddOperator


1 /* StringAddOperator Copyright (C) 1998-2002 Jochen Hoenicke.
2  *
3  * This program is free software; you can redistribute it and/or modify
4  * it under the terms of the GNU Lesser General Public License as published by
5  * the Free Software Foundation; either version 2, or (at your option)
6  * any later version.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU Lesser General Public License
14  * along with this program; see the file COPYING.LESSER. If not, write to
15  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
16  *
17  * $Id: StringAddOperator.java,v 2.14.2.1 2002/05/28 17:34:06 hoenicke Exp $
18  */
19
20 package jode.expr;
21 import jode.type.Type;
22 import jode.decompiler.TabbedPrintWriter;
23
24 public class StringAddOperator extends Operator {
25     protected Type operandType;
26
27     public StringAddOperator() {
28         super(Type.tString, ADD_OP);
29     initOperands(2);
30     }
31
32     public int getPriority() {
33         return 610;
34     }
35
36     public boolean opEquals(Operator o) {
37     return (o instanceof StringAddOperator);
38     }
39
40     public void updateSubTypes() {
41     /* A string add allows everything */
42     }
43
44     public void updateType() {
45     }
46     
47
48     public void dumpExpression(TabbedPrintWriter writer)
49     throws java.io.IOException JavaDoc {
50
51     if (!subExpressions[0].getType().isOfType(Type.tString)
52         && !subExpressions[1].getType().isOfType(Type.tString)) {
53         writer.print("\"\"");
54         writer.breakOp();
55         writer.print(getOperatorString());
56     }
57
58     subExpressions[0].dumpExpression(writer, 610);
59     writer.breakOp();
60     writer.print(getOperatorString());
61     subExpressions[1].dumpExpression(writer, 611);
62     }
63 }
64
65
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