Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/VirtualConstructor.java @ 3945:8ed53447f690
Merge
author | iveresov |
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date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | f6f3bb0ee072 |
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rev | line source |
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0 | 1 /* |
3939 | 2 * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.runtime; | |
26 | |
27 import java.util.*; | |
28 import sun.jvm.hotspot.debugger.*; | |
29 import sun.jvm.hotspot.types.*; | |
30 | |
31 /** This class provides generalized "virtual constructor" | |
32 functionality for VMObjects. In simple terms, it creates | |
33 correctly-typed Java wrapper objects for underlying Addresses, | |
34 using the "RTTI-like" functionality of TypeDataBase. For example, | |
35 if the given Address really is a DefNewGeneration*, the Java object | |
36 created for it will be of type | |
37 sun.jvm.hotspot.memory.DefNewGeneration, assuming the mapping from | |
38 type "DefNewGeneration" to class | |
39 sun.jvm.hotspot.memory.DefNewGeneration has been set up. */ | |
40 | |
3939 | 41 public class VirtualConstructor extends InstanceConstructor<VMObject> { |
0 | 42 private TypeDataBase db; |
43 private Map map; // Map<String, Class> | |
44 | |
45 public VirtualConstructor(TypeDataBase db) { | |
46 this.db = db; | |
47 map = new HashMap(); | |
48 } | |
49 | |
50 /** Adds a mapping from the given C++ type name to the given Java | |
51 class. The latter must be a subclass of | |
52 sun.jvm.hotspot.runtime.VMObject. Returns false if there was | |
53 already a class for this type name in the map. */ | |
54 public boolean addMapping(String cTypeName, Class clazz) { | |
55 if (map.get(cTypeName) != null) { | |
56 return false; | |
57 } | |
58 | |
59 map.put(cTypeName, clazz); | |
60 return true; | |
61 } | |
62 | |
63 /** Instantiate the most-precisely typed wrapper object available | |
64 for the type of the given Address. If no type in the mapping | |
65 matched the type of the Address, throws a WrongTypeException. | |
66 Returns null for a null address (similar behavior to | |
67 VMObjectFactory). */ | |
68 public VMObject instantiateWrapperFor(Address addr) throws WrongTypeException { | |
69 if (addr == null) { | |
70 return null; | |
71 } | |
72 | |
73 for (Iterator iter = map.keySet().iterator(); iter.hasNext(); ) { | |
74 String typeName = (String) iter.next(); | |
75 if (db.addressTypeIsEqualToType(addr, db.lookupType(typeName))) { | |
76 return (VMObject) VMObjectFactory.newObject((Class) map.get(typeName), addr); | |
77 } | |
78 } | |
79 | |
3939 | 80 throw newWrongTypeException(addr); |
0 | 81 } |
82 } |