01: /*BEGIN_COPYRIGHT_BLOCK
02: *
03: * Copyright (c) 2001-2007, JavaPLT group at Rice University (javaplt@rice.edu)
04: * All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions are met:
08: * * Redistributions of source code must retain the above copyright
09: * notice, this list of conditions and the following disclaimer.
10: * * Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * * Neither the names of DrJava, the JavaPLT group, Rice University, nor the
14: * names of its contributors may be used to endorse or promote products
15: * derived from this software without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
21: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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29: * This software is Open Source Initiative approved Open Source Software.
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35: * END_COPYRIGHT_BLOCK*/
36:
37: package edu.rice.cs.util.sexp;
38:
39: public class NumberAtom implements Atom {
40: private double _num;
41: private boolean _hasDecimals;
42:
43: public NumberAtom(int num) {
44: _num = (double) num;
45: _hasDecimals = false;
46: }
47:
48: public NumberAtom(double num) {
49: _num = num;
50: _hasDecimals = (num % 1 < 1e-12);
51: }
52:
53: public boolean hasDecimals() {
54: return _hasDecimals;
55: }
56:
57: public int intValue() {
58: return (int) _num;
59: }
60:
61: public double doubleValue() {
62: return _num;
63: }
64:
65: /**
66: * Visitor hook for the NumberAtom
67: * @param v the visitor
68: * @return result of the given algorithm
69: */
70: public <Ret> Ret accept(SExpVisitor<Ret> v) {
71: return v.forNumberAtom(this );
72: }
73:
74: public String toString() {
75: if (_hasDecimals) {
76: return "" + doubleValue();
77: } else {
78: return "" + intValue();
79: }
80: }
81: }
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