View Javadoc
1   /*
2    * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  /*
26   * COMPONENT_NAME: idl.parser
27   *
28   * ORIGINS: 27
29   *
30   * Licensed Materials - Property of IBM
31   * 5639-D57 (C) COPYRIGHT International Business Machines Corp. 1997, 1999
32   * RMI-IIOP v1.0
33   *
34   */
35  
36  package com.sun.tools.corba.se.idl.constExpr;
37  
38  // NOTES:
39  
40  import com.sun.tools.corba.se.idl.Util;
41  import java.math.BigInteger;
42  
43  public class Negative extends UnaryExpr
44  {
45    protected Negative (Expression operand)
46    {
47      super ("-", operand);
48    } // ctor
49  
50    public Object evaluate () throws EvaluationException
51    {
52      try
53      {
54        Number op = (Number)operand ().evaluate ();
55  
56        if (op instanceof Float || op instanceof Double)
57          value (new Double (-op.doubleValue ()));
58        else
59        {
60          // Multiply by -1
61          //daz        value (new Long (-op.longValue ()));
62          BigInteger tmpOp = (BigInteger)op;
63          value (tmpOp.multiply (BigInteger.valueOf (-1)));
64       }
65      }
66      catch (ClassCastException e)
67      {
68        String[] parameters = {Util.getMessage ("EvaluationException.neg"), operand ().value ().getClass ().getName ()};
69        throw new EvaluationException (Util.getMessage ("EvaluationException.2", parameters));
70      }
71      return value ();
72    } // evaluate
73  } // class Negative