1 /*
   2  * Copyright (c) 1999, 2001, 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.ConstEntry;
  41 import java.math.BigInteger;
  42 
  43 /**
  44  * This class contains values.  Objects of this class are the terminal
  45  * nodes of an expression tree.
  46  * <b>
  47  * Note that there is a constructor for Double values, but not Float.
  48  * CORBA defines that all floating point expressions are evaluated as
  49  * double, and that the result is coerced back to float if necessary.
  50  * <b>
  51  * Note also that there is a constructor for long values, but not for
  52  * int or short.  CORBA defines that all integral expressions are evaluated
  53  * as unsigned long.  A CORBA long is a Java int.  There is no unsigned int
  54  * in Java, so the next larger type, long, is used.
  55  **/
  56 public class Terminal extends Expression
  57 {
  58   protected Terminal (String representation, Character charValue,
  59     boolean isWide)
  60   {
  61     rep (representation);
  62     value (charValue);
  63     if (isWide)
  64         type( "wchar" ) ;
  65     else
  66         type( "char" ) ;
  67   } // ctor
  68 
  69   protected Terminal (String representation, Boolean booleanValue)
  70   {
  71     rep (representation);
  72     value (booleanValue);
  73   } // ctor
  74 
  75   // Support long long <daz>
  76   protected Terminal (String representation, BigInteger bigIntegerValue)
  77   {
  78     rep (representation);
  79     value (bigIntegerValue);
  80   } // ctor
  81 
  82   protected Terminal (String representation, Long longValue)
  83   {
  84     long lv = longValue.longValue ();
  85     rep (representation);
  86     if (lv > Integer.MAX_VALUE || lv < Integer.MIN_VALUE)
  87       value (longValue);
  88     else
  89       value (new Integer (longValue.intValue ()));
  90   } // ctor
  91 
  92   protected Terminal (String representation, Double doubleValue)
  93   {
  94     rep (representation);
  95     value (doubleValue);
  96   } // ctor
  97 
  98   protected Terminal (String stringValue, boolean isWide )
  99   {
 100     rep (stringValue);
 101     value (stringValue);
 102     if (isWide)
 103         type( "wstring" ) ;
 104     else
 105         type( "string" ) ;
 106   } // ctor
 107 
 108   protected Terminal (ConstEntry constReference)
 109   {
 110     rep (constReference.fullName ());
 111     value (constReference);
 112   } // ctor
 113 
 114   ///// INSTANCE METHODS
 115   public Object evaluate () throws EvaluationException
 116   {
 117     if (value () instanceof ConstEntry)
 118       return ((ConstEntry)value ()).value ().evaluate ();
 119     else
 120       return value ();
 121   } // evaluate
 122 } // class Terminal