1 /*
2 * Copyright (c) 2005, 2008, Oracle and/or its affiliates. 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.management;
27
28 import java.util.HashMap;
29 import java.util.Map;
30 import java.util.function.Predicate;
31 import javax.management.openmbean.CompositeType;
32 import javax.management.openmbean.CompositeData;
33 import javax.management.openmbean.CompositeDataSupport;
34 import javax.management.openmbean.OpenDataException;
35
36 /**
37 * A CompositeData for StackTraceElement for the local management support.
38 * This class avoids the performance penalty paid to the
39 * construction of a CompositeData use in the local case.
40 */
41 public class StackTraceElementCompositeData extends LazyCompositeData {
42 private final StackTraceElement ste;
43
44 private StackTraceElementCompositeData(StackTraceElement ste) {
45 this.ste = ste;
46 }
47
48 public StackTraceElement getStackTraceElement() {
49 return ste;
50 }
51
52 public static StackTraceElement from(CompositeData cd) {
53 validateCompositeData(cd);
54
55 if (stackTraceElementV6CompositeType.equals(cd.getCompositeType())) {
56 return new StackTraceElement(getString(cd, CLASS_NAME),
57 getString(cd, METHOD_NAME),
58 getString(cd, FILE_NAME),
59 getInt(cd, LINE_NUMBER));
60 } else {
61 return new StackTraceElement(getString(cd, CLASS_LOADER_NAME),
62 getString(cd, MODULE_NAME),
63 getString(cd, MODULE_VERSION),
64 getString(cd, CLASS_NAME),
65 getString(cd, METHOD_NAME),
66 getString(cd, FILE_NAME),
67 getInt(cd, LINE_NUMBER));
68 }
69 }
70
71 public static CompositeData toCompositeData(StackTraceElement ste) {
72 StackTraceElementCompositeData cd = new StackTraceElementCompositeData(ste);
73 return cd.getCompositeData();
74 }
75
76 protected CompositeData getCompositeData() {
77 // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH
78 // stackTraceElementItemNames!
79 final Object[] stackTraceElementItemValues = {
80 ste.getClassLoaderName(),
81 ste.getModuleName(),
82 ste.getModuleVersion(),
83 ste.getClassName(),
84 ste.getMethodName(),
85 ste.getFileName(),
86 ste.getLineNumber(),
87 ste.isNativeMethod(),
88 };
89 try {
90 return new CompositeDataSupport(stackTraceElementCompositeType,
91 stackTraceElementItemNames,
92 stackTraceElementItemValues);
93 } catch (OpenDataException e) {
94 // Should never reach here
95 throw new AssertionError(e);
96 }
97 }
98
99 // Attribute names
100 private static final String CLASS_LOADER_NAME = "classLoaderName";
101 private static final String MODULE_NAME = "moduleName";
102 private static final String MODULE_VERSION = "moduleVersion";
103 private static final String CLASS_NAME = "className";
104 private static final String METHOD_NAME = "methodName";
105 private static final String FILE_NAME = "fileName";
106 private static final String LINE_NUMBER = "lineNumber";
107 private static final String NATIVE_METHOD = "nativeMethod";
108
109
110 private static final String[] stackTraceElementItemNames = {
111 CLASS_LOADER_NAME,
112 MODULE_NAME,
113 MODULE_VERSION,
114 CLASS_NAME,
115 METHOD_NAME,
116 FILE_NAME,
117 LINE_NUMBER,
118 NATIVE_METHOD,
119 };
120
121 private static final String[] stackTraceElementV9ItemNames = {
122 CLASS_LOADER_NAME,
123 MODULE_NAME,
124 MODULE_VERSION,
125 };
126
127 private static final CompositeType stackTraceElementCompositeType;
128 private static final CompositeType stackTraceElementV6CompositeType;
129 static {
130 try {
131 stackTraceElementCompositeType = (CompositeType)
132 MappedMXBeanType.toOpenType(StackTraceElement.class);
133 stackTraceElementV6CompositeType =
134 TypeVersionMapper.getInstance().getVersionedCompositeType(
135 stackTraceElementCompositeType,
136 TypeVersionMapper.V6
137 );
138 } catch (OpenDataException e) {
139 // Should never reach here
140 throw new AssertionError(e);
141 }
142 }
143
144 /** Validate if the input CompositeData has the expected
145 * CompositeType (i.e. contain all attributes with expected
146 * names and types).
147 */
148 public static void validateCompositeData(CompositeData cd) {
149 if (cd == null) {
150 throw new NullPointerException("Null CompositeData");
151 }
152
153 CompositeType ct = cd.getCompositeType();
154 if (!isTypeMatched(stackTraceElementCompositeType, ct)) {
155 if (!isTypeMatched(stackTraceElementV6CompositeType, ct)) {
156 throw new IllegalArgumentException(
157 "Unexpected composite type for StackTraceElement");
158 }
159 }
160 }
161
162 static boolean isV6Attribute(String name) {
163 for(String attrName : stackTraceElementV9ItemNames) {
164 if (name.equals(attrName)) {
165 return false;
166 }
167 }
168 return true;
169 }
170
171 private static final long serialVersionUID = -2704607706598396827L;
172 }