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comparison agent/src/share/classes/sun/jvm/hotspot/debugger/cdbg/ObjectVisitor.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 2001 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.debugger.cdbg;
26
27 import sun.jvm.hotspot.debugger.*;
28
29 /** Provides uniform visitation to primitive and compound objects.
30 Typically one will have an Address of an "object" (in the
31 idealistic C++ definition, including "primitive objects" like
32 ints) and a Type for that object. This visitor interface allows
33 one to either get the value of the object (if of primitive type)
34 or iterate through its fields, getting the value of each, in a
35 consistent fashion. Also supports iteration through arrays of
36 known length. */
37
38 public interface ObjectVisitor {
39 /** This is called before beginning iterating through either the
40 fields declared in this compound type (not its superclasses) or
41 the elements of this array */
42 public void enterType(Type type, Address objectAddress);
43
44 /** This is called after finishing iterating through this compound
45 type */
46 public void exitType();
47
48 /** Primitive field or object of integer bitfield
49 type. FieldIdentifier is null if not a field of an enclosing
50 object. */
51 public void doBit(FieldIdentifier f, long val);
52
53 /** Primitive field or object of integer type. FieldIdentifier is
54 null if not a field of an enclosing object. */
55 public void doInt(FieldIdentifier f, long val);
56
57 /** Primitive field or object of enumerated type type.
58 FieldIdentifier is null if not a field of an enclosing
59 object. */
60 public void doEnum(FieldIdentifier f, long val, String enumName);
61
62 /** Primitive field or object of single-precision floating-point
63 type. FieldIdentifier is null if not a field of an enclosing
64 object. */
65 public void doFloat(FieldIdentifier f, float val);
66
67 /** Primitive field or object of double-precision floating-point
68 type. FieldIdentifier is null if not a field of an enclosing
69 object. */
70 public void doDouble(FieldIdentifier f, double val);
71
72 /** Primitive field or object of pointer type. FieldIdentifier is
73 null if not a field of an enclosing object. */
74 public void doPointer(FieldIdentifier f, Address val);
75
76 /** Primitive field or object of array type. FieldIdentifier is null
77 if not a field of an enclosing object. */
78 public void doArray(FieldIdentifier f, Address val);
79
80 /** Primitive field or object of (C++) reference
81 type. FieldIdentifier is null if not a field of an enclosing
82 object. */
83 public void doRef(FieldIdentifier f, Address val);
84
85 /** Identifies embedded objects in compound objects. FieldIdentifier
86 is null if not a field of an enclosing object. */
87 public void doCompound(FieldIdentifier f, Address addressOfEmbeddedCompoundObject);
88 }