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, MODULE_NAME),
62 getString(cd, MODULE_VERSION),
63 getString(cd, CLASS_NAME),
64 getString(cd, METHOD_NAME),
65 getString(cd, FILE_NAME),
66 getInt(cd, LINE_NUMBER));
67 }
68 }
69
70 public static CompositeData toCompositeData(StackTraceElement ste) {
71 StackTraceElementCompositeData cd = new StackTraceElementCompositeData(ste);
72 return cd.getCompositeData();
73 }
74
75 protected CompositeData getCompositeData() {
76 // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH
77 // stackTraceElementItemNames!
78 final Object[] stackTraceElementItemValues = {
79 ste.getClassName(),
80 ste.getMethodName(),
81 ste.getFileName(),
82 ste.getLineNumber(),
83 ste.isNativeMethod(),
84 ste.getModuleName(),
85 ste.getModuleVersion(),
86 };
87 try {
88 return new CompositeDataSupport(stackTraceElementCompositeType,
89 stackTraceElementItemNames,
90 stackTraceElementItemValues);
91 } catch (OpenDataException e) {
92 // Should never reach here
93 throw new AssertionError(e);
94 }
95 }
96
97 // Attribute names
98 private static final String CLASS_NAME = "className";
99 private static final String METHOD_NAME = "methodName";
100 private static final String FILE_NAME = "fileName";
101 private static final String LINE_NUMBER = "lineNumber";
102 private static final String NATIVE_METHOD = "nativeMethod";
103 private static final String MODULE_NAME = "moduleName";
104 private static final String MODULE_VERSION = "moduleVersion";
105
106 private static final String[] stackTraceElementItemNames = {
107 CLASS_NAME,
108 METHOD_NAME,
109 FILE_NAME,
110 LINE_NUMBER,
111 NATIVE_METHOD,
112 MODULE_NAME,
113 MODULE_VERSION,
114 };
115
116 private static final String[] stackTraceElementV9ItemNames = {
117 MODULE_NAME,
118 MODULE_VERSION,
119 };
120
121 private static final CompositeType stackTraceElementCompositeType;
122 private static final CompositeType stackTraceElementV6CompositeType;
123 static {
124 try {
125 stackTraceElementCompositeType = (CompositeType)
126 MappedMXBeanType.toOpenType(StackTraceElement.class);
127 stackTraceElementV6CompositeType =
128 TypeVersionMapper.getInstance().getVersionedCompositeType(
129 stackTraceElementCompositeType,
130 TypeVersionMapper.V6
131 );
132 } catch (OpenDataException e) {
133 // Should never reach here
134 throw new AssertionError(e);
135 }
136 }
137
138 /** Validate if the input CompositeData has the expected
139 * CompositeType (i.e. contain all attributes with expected
140 * names and types).
141 */
142 public static void validateCompositeData(CompositeData cd) {
143 if (cd == null) {
144 throw new NullPointerException("Null CompositeData");
145 }
146
147 CompositeType ct = cd.getCompositeType();
148 if (!isTypeMatched(stackTraceElementCompositeType, ct)) {
149 if (!isTypeMatched(stackTraceElementV6CompositeType, ct)) {
150 throw new IllegalArgumentException(
151 "Unexpected composite type for StackTraceElement");
152 }
153 }
154 }
155
156 static boolean isV6Attribute(String name) {
157 for(String attrName : stackTraceElementV9ItemNames) {
158 if (name.equals(attrName)) {
159 return false;
160 }
161 }
162 return true;
163 }
164
165 private static final long serialVersionUID = -2704607706598396827L;
166 }