1 cananian 1.1.2.2 // AccessFlags.java, created Mon Jan 18 22:44:33 1999 by cananian
2 cananian 1.1.2.1 // Copyright (C) 1998 C. Scott Ananian <cananian@alumni.princeton.edu>
3 cananian 1.1.2.1 // Licensed under the terms of the GNU GPL; see COPYING for details.
4 cananian 1.1.2.1 package harpoon.IR.RawClass;
5 cananian 1.1.2.1
6 cananian 1.1.2.1 /**
7 cananian 1.1.2.1 * Represents a set of method or field access flags, containing
8 cananian 1.1.2.1 * permissions and properties of a field or method.
9 cananian 1.1.2.1 *
10 cananian 1.1.2.1 * @author C. Scott Ananian <cananian@alumni.princeton.edu>
11 cananian 1.3 * @version $Id: AccessFlags.java,v 1.3 2002/04/10 03:05:30 cananian Exp $
12 cananian 1.1.2.1 * @see "The Java Virtual Machine Specification"
13 cananian 1.1.2.1 * @see ClassFile
14 cananian 1.1.2.1 * @see FieldInfo
15 cananian 1.1.2.1 * @see MethodInfo
16 cananian 1.1.2.1 */
17 cananian 1.1.2.1 public class AccessFlags {
18 cananian 1.1.2.1 /** May be accessed from outside package. */
19 cananian 1.1.2.1 static final int ACC_PUBLIC = 0x001;
20 cananian 1.1.2.1 /** Usable only within defining class. */
21 cananian 1.1.2.1 static final int ACC_PRIVATE = 0x002;
22 cananian 1.1.2.1 /** May be accessed withing subclasses. */
23 cananian 1.1.2.1 static final int ACC_PROTECTED=0x004;
24 cananian 1.1.2.1 /** Is static. */
25 cananian 1.1.2.1 static final int ACC_STATIC = 0x008;
26 cananian 1.1.2.1 /** No further assignment after init. */
27 cananian 1.1.2.1 static final int ACC_FINAL = 0x010;
28 cananian 1.1.2.1 /** Wrap use in monitor lock. */
29 cananian 1.1.2.1 static final int ACC_SYNCHRON= 0x020;
30 cananian 1.1.2.1 /** Use new superclass semantics. */
31 cananian 1.1.2.1 static final int ACC_SUPER = 0x020;
32 cananian 1.1.2.1 /** Is volatile; cannot be cached. */
33 cananian 1.1.2.1 static final int ACC_VOLATILE= 0x040;
34 cananian 1.1.2.1 /** Not touched by persistent object manager. */
35 cananian 1.1.2.1 static final int ACC_TRANSIENT=0x080;
36 cananian 1.1.2.1 /** Not implemented in Java. */
37 cananian 1.1.2.1 static final int ACC_NATIVE =0x100;
38 cananian 1.1.2.1 /** Is an interface. */
39 cananian 1.1.2.1 static final int ACC_INTERFACE=0x200;
40 cananian 1.1.2.1 /** No implementation is provided. */
41 cananian 1.1.2.1 static final int ACC_ABSTRACT =0x400;
42 cananian 1.2.2.1 /** Floating-point mode is FP-strict. */
43 cananian 1.2.2.1 static final int ACC_STRICT =0x800;
44 cananian 1.1.2.1
45 cananian 1.1.2.1 public int access_flags;
46 cananian 1.1.2.1
47 cananian 1.1.2.1 /** Constructor. */
48 cananian 1.1.2.1 public AccessFlags(int flags) {
49 cananian 1.1.2.1 access_flags = flags;
50 cananian 1.1.2.1 }
51 cananian 1.1.2.1 /** Constructor. */
52 cananian 1.1.2.1 public AccessFlags(ClassDataInputStream in) throws java.io.IOException {
53 cananian 1.1.2.1 this(in.read_u2());
54 cananian 1.1.2.1 }
55 cananian 1.1.2.1 /** Write to bytecode file. */
56 cananian 1.1.2.1 public void write(ClassDataOutputStream out) throws java.io.IOException {
57 cananian 1.1.2.1 out.write_u2(access_flags);
58 cananian 1.1.2.1 }
59 cananian 1.1.2.1
60 cananian 1.1.2.1 public boolean isPublic() { return (access_flags & ACC_PUBLIC) != 0; }
61 cananian 1.1.2.1 public boolean isPrivate() { return (access_flags & ACC_PRIVATE) != 0; }
62 cananian 1.1.2.1 public boolean isProtected(){ return (access_flags & ACC_PROTECTED) != 0; }
63 cananian 1.1.2.1 public boolean isStatic() { return (access_flags & ACC_STATIC) != 0; }
64 cananian 1.1.2.1 public boolean isFinal() { return (access_flags & ACC_FINAL) != 0; }
65 cananian 1.1.2.1 public boolean isVolatile() { return (access_flags & ACC_VOLATILE) != 0; }
66 cananian 1.1.2.1 public boolean isTransient(){ return (access_flags & ACC_TRANSIENT) != 0; }
67 cananian 1.1.2.1 public boolean isSynchronized(){return(access_flags& ACC_SYNCHRON) != 0; }
68 cananian 1.1.2.1 public boolean isNative() { return (access_flags & ACC_NATIVE) != 0; }
69 cananian 1.1.2.1 public boolean isAbstract() { return (access_flags & ACC_ABSTRACT) != 0; }
70 cananian 1.1.2.1 public boolean isSuper() { return (access_flags & ACC_SUPER) != 0; }
71 cananian 1.1.2.1 public boolean isInterface(){ return (access_flags & ACC_INTERFACE) != 0; }
72 cananian 1.2.2.1 public boolean isStrict() { return (access_flags & ACC_STRICT) != 0; }
73 cananian 1.1.2.1
74 cananian 1.1.2.1 // ClassFile uses: PUBLIC, FINAL, SUPER, INTERFACE, ABSTRACT.
75 cananian 1.1.2.1 // FieldInfo uses: PUBLIC, PRIVATE, PROTECTED, STATIC, FINAL,
76 cananian 1.1.2.1 // VOLATILE, TRANSIENT.
77 cananian 1.1.2.1 // MethodInfo uses: PUBLIC, PRIVATE, PROTECTED, STATIC, FINAL,
78 cananian 1.2.2.1 // SYNCHRONIZED, NATIVE, ABSTRACT, STRICT.
79 cananian 1.1.2.1
80 cananian 1.1.2.1 /**
81 cananian 1.1.2.1 * Returns a string with the access flags in canonical order.
82 cananian 1.1.2.1 * Omits ACC_SUPER and ACC_INTERFACE.
83 cananian 1.1.2.1 */
84 cananian 1.1.2.1 public String toString() {
85 cananian 1.1.2.1 StringBuffer r = new StringBuffer();
86 cananian 1.1.2.1 if (isPublic()) r.append("public ");
87 cananian 1.1.2.1 if (isProtected()) r.append("protected ");
88 cananian 1.1.2.1 if (isPrivate()) r.append("private ");
89 cananian 1.1.2.1 if (isAbstract()) r.append("abstract ");
90 cananian 1.1.2.1 if (isStatic()) r.append("static ");
91 cananian 1.1.2.1 if (isFinal()) r.append("final ");
92 cananian 1.1.2.1 if (isTransient()) r.append("transient ");
93 cananian 1.1.2.1 if (isVolatile()) r.append("volatile ");
94 cananian 1.1.2.1 if (isSynchronized()) r.append("synchronized ");
95 cananian 1.1.2.1 if (isNative()) r.append("native ");
96 cananian 1.2.2.1 if (isStrict()) r.append("strictfp ");
97 cananian 1.1.2.1 return r.toString().trim();
98 cananian 1.1.2.1 }
99 cananian 1.2 }