Wed, 25 Mar 2009 10:29:28 +0000
6400189: raw types and inference
Summary: Fixed resolution problem with raw overriding (CCC)
Reviewed-by: jjg
1 /*
2 * Copyright 2005 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
26 package com.sun.tools.javac.util;
28 import com.sun.tools.javac.code.Type;
30 import static com.sun.tools.javac.code.TypeTags.*;
32 /**
33 * Utilities for operating on constant values.
34 *
35 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
36 * you write code that depends on this, you do so at your own risk.
37 * This code and its internal interfaces are subject to change or
38 * deletion without notice.</b>
39 */
40 public class Constants {
42 /**
43 * Converts a constant in internal representation (in which
44 * boolean, char, byte, short, and int are each represented by an
45 * Integer) into standard representation. Other values (including
46 * null) are returned unchanged.
47 */
48 public static Object decode(Object value, Type type) {
49 if (value instanceof Integer) {
50 int i = (Integer) value;
51 switch (type.tag) {
52 case BOOLEAN: return i != 0;
53 case CHAR: return (char) i;
54 case BYTE: return (byte) i;
55 case SHORT: return (short) i;
56 }
57 }
58 return value;
59 }
61 /**
62 * Returns a string representation of a constant value (given in
63 * internal representation), quoted and formatted as in Java source.
64 */
65 public static String format(Object value, Type type) {
66 value = decode(value, type);
67 switch (type.tag) {
68 case BYTE: return formatByte((Byte) value);
69 case LONG: return formatLong((Long) value);
70 case FLOAT: return formatFloat((Float) value);
71 case DOUBLE: return formatDouble((Double) value);
72 case CHAR: return formatChar((Character) value);
73 }
74 if (value instanceof String)
75 return formatString((String) value);
76 return value + "";
77 }
79 /**
80 * Returns a string representation of a constant value (given in
81 * standard wrapped representation), quoted and formatted as in
82 * Java source.
83 */
84 public static String format(Object value) {
85 if (value instanceof Byte) return formatByte((Byte) value);
86 if (value instanceof Long) return formatLong((Long) value);
87 if (value instanceof Float) return formatFloat((Float) value);
88 if (value instanceof Double) return formatDouble((Double) value);
89 if (value instanceof Character) return formatChar((Character) value);
90 if (value instanceof String) return formatString((String) value);
91 return value + "";
92 }
94 private static String formatByte(byte b) {
95 return String.format("0x%02x", b);
96 }
98 private static String formatLong(long lng) {
99 return lng + "L";
100 }
102 private static String formatFloat(float f) {
103 if (Float.isNaN(f))
104 return "0.0f/0.0f";
105 else if (Float.isInfinite(f))
106 return (f < 0) ? "-1.0f/0.0f" : "1.0f/0.0f";
107 else
108 return f + "f";
109 }
111 private static String formatDouble(double d) {
112 if (Double.isNaN(d))
113 return "0.0/0.0";
114 else if (Double.isInfinite(d))
115 return (d < 0) ? "-1.0/0.0" : "1.0/0.0";
116 else
117 return d + "";
118 }
120 private static String formatChar(char c) {
121 return '\'' + Convert.quote(c) + '\'';
122 }
124 private static String formatString(String s) {
125 return '"' + Convert.quote(s) + '"';
126 }
127 }