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Java > Open Source Codes > jxl > biff > formula > Minus


1 /*********************************************************************
2 *
3 * Copyright (C) 2003 Andrew Khan
4 *
5 * This library 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 library 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 library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 ***************************************************************************/
19
20 package jxl.biff.formula;
21
22 /**
23  * Ambiguously defined minus operator, used as a place holder when parsing
24  * string formulas. At this stage it could be either
25  * a unary or binary operator - the string parser will deduce which and
26  * create the appropriate type
27  */
28 class Minus extends StringOperator
29 {
30   /**
31    * Constructor
32    */
33   public Minus()
34   {
35     super();
36   }
37
38   /**
39    * Abstract method which gets the binary version of this operator
40    */
41   Operator getBinaryOperator()
42   {
43     return new Subtract();
44   }
45
46   /**
47    * Abstract method which gets the unary version of this operator
48    */
49   Operator getUnaryOperator()
50   {
51     return new UnaryMinus();
52   }
53
54
55 }
56
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