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comparison agent/src/share/classes/sun/jvm/hotspot/utilities/ConstantTag.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2001-2005 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.utilities;
26
27 public class ConstantTag {
28 // These replicated from the VM to save space
29 private static int JVM_CONSTANT_Utf8 = 1;
30 private static int JVM_CONSTANT_Unicode = 2; // unused
31 private static int JVM_CONSTANT_Integer = 3;
32 private static int JVM_CONSTANT_Float = 4;
33 private static int JVM_CONSTANT_Long = 5;
34 private static int JVM_CONSTANT_Double = 6;
35 private static int JVM_CONSTANT_Class = 7;
36 private static int JVM_CONSTANT_String = 8;
37 private static int JVM_CONSTANT_Fieldref = 9;
38 private static int JVM_CONSTANT_Methodref = 10;
39 private static int JVM_CONSTANT_InterfaceMethodref = 11;
40 private static int JVM_CONSTANT_NameAndType = 12;
41 private static int JVM_CONSTANT_Invalid = 0; // For bad value initialization
42 private static int JVM_CONSTANT_UnresolvedClass = 100; // Temporary tag until actual use
43 private static int JVM_CONSTANT_ClassIndex = 101; // Temporary tag while constructing constant pool
44 private static int JVM_CONSTANT_UnresolvedString = 102; // Temporary tag until actual use
45 private static int JVM_CONSTANT_StringIndex = 103; // Temporary tag while constructing constant pool
46 private static int JVM_CONSTANT_UnresolvedClassInError = 104; // Resolution failed
47
48 private byte tag;
49
50 public ConstantTag(byte tag) {
51 this.tag = tag;
52 }
53
54 public boolean isKlass() { return tag == JVM_CONSTANT_Class; }
55 public boolean isField () { return tag == JVM_CONSTANT_Fieldref; }
56 public boolean isMethod() { return tag == JVM_CONSTANT_Methodref; }
57 public boolean isInterfaceMethod() { return tag == JVM_CONSTANT_InterfaceMethodref; }
58 public boolean isString() { return tag == JVM_CONSTANT_String; }
59 public boolean isInt() { return tag == JVM_CONSTANT_Integer; }
60 public boolean isFloat() { return tag == JVM_CONSTANT_Float; }
61 public boolean isLong() { return tag == JVM_CONSTANT_Long; }
62 public boolean isDouble() { return tag == JVM_CONSTANT_Double; }
63 public boolean isNameAndType() { return tag == JVM_CONSTANT_NameAndType; }
64 public boolean isUtf8() { return tag == JVM_CONSTANT_Utf8; }
65
66 public boolean isInvalid() { return tag == JVM_CONSTANT_Invalid; }
67
68 public boolean isUnresolvedKlass() {
69 return tag == JVM_CONSTANT_UnresolvedClass || tag == JVM_CONSTANT_UnresolvedClassInError;
70 }
71 public boolean isUnresolveKlassInError() { return tag == JVM_CONSTANT_UnresolvedClassInError; }
72 public boolean isKlassIndex() { return tag == JVM_CONSTANT_ClassIndex; }
73 public boolean isUnresolvedString() { return tag == JVM_CONSTANT_UnresolvedString; }
74 public boolean isStringIndex() { return tag == JVM_CONSTANT_StringIndex; }
75
76 public boolean isKlassReference() { return isKlassIndex() || isUnresolvedKlass(); }
77 public boolean isFieldOrMethod() { return isField() || isMethod() || isInterfaceMethod(); }
78 public boolean isSymbol() { return isUtf8(); }
79 }