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comparison agent/src/share/classes/sun/jvm/hotspot/utilities/soql/JSJavaKlass.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 2004-2007 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.soql;
26
27 import java.util.*;
28 import sun.jvm.hotspot.oops.*;
29 import sun.jvm.hotspot.utilities.*;
30
31 /**
32 This is JavaScript wrapper for Klass.
33 */
34 public abstract class JSJavaKlass {
35 private static final int FIELD_SUPER_CLASS = 0;
36 private static final int FIELD_NAME = 1;
37 private static final int FIELD_IS_ARRAY_CLASS = 2;
38 private static final int FIELD_UNDEFINED = -1;
39
40 public JSJavaKlass(Klass klass, JSJavaFactory factory) {
41 this.factory = factory;
42 this.klass = klass;
43 }
44
45 public final Klass getKlass() {
46 return klass;
47 }
48
49 public JSJavaClass getJSJavaClass() {
50 return (JSJavaClass) factory.newJSJavaObject(getKlass().getJavaMirror());
51 }
52
53 public Object getMetaClassFieldValue(String name) {
54 int fieldID = getFieldID(name);
55 switch (fieldID) {
56 case FIELD_SUPER_CLASS: {
57 JSJavaKlass jk = factory.newJSJavaKlass(getKlass().getSuper());
58 return (jk != null) ? jk.getJSJavaClass() : null;
59 }
60 case FIELD_NAME:
61 return getName();
62 case FIELD_IS_ARRAY_CLASS:
63 return Boolean.valueOf(isArray());
64 case FIELD_UNDEFINED:
65 default:
66 return ScriptObject.UNDEFINED;
67 }
68 }
69
70 public boolean hasMetaClassField(String name) {
71 return getFieldID(name) != FIELD_UNDEFINED;
72 }
73
74
75 public String[] getMetaClassFieldNames() {
76 String[] res = { "name", "superClass", "isArrayClass" };
77 return res;
78 }
79
80 public abstract String getName();
81 public abstract boolean isArray();
82
83 //-- Internals only below this point
84 private static Map fields = new HashMap();
85 private static void addField(String name, int fieldId) {
86 fields.put(name, new Integer(fieldId));
87 }
88
89 private static int getFieldID(String name) {
90 Integer res = (Integer) fields.get(name);
91 return (res != null)? res.intValue() : FIELD_UNDEFINED;
92 }
93
94 static {
95 addField("base", FIELD_SUPER_CLASS);
96 addField("baseClass", FIELD_SUPER_CLASS);
97 addField("superClass", FIELD_SUPER_CLASS);
98 addField("name", FIELD_NAME);
99 addField("isArrayClass", FIELD_IS_ARRAY_CLASS);
100 }
101
102 protected final JSJavaFactory factory;
103 private final Klass klass;
104 }