1 /* |
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2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package sun.management; |
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26 |
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27 import java.lang.management.ThreadInfo; |
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28 import java.util.ArrayList; |
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29 import java.util.HashMap; |
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30 import java.util.List; |
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31 import java.util.Map; |
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32 import java.util.function.Predicate; |
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33 import javax.management.openmbean.ArrayType; |
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34 import javax.management.openmbean.CompositeType; |
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35 import javax.management.openmbean.OpenDataException; |
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36 import javax.management.openmbean.OpenType; |
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37 import javax.management.openmbean.SimpleType; |
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38 import javax.management.openmbean.TabularType; |
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39 import static sun.management.Util.toStringArray; |
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40 |
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41 /** |
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42 * Provides simplistic support for versioning of {@linkplain CompositeType} instances |
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43 * based on the latest version and filtering out certain items. |
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44 */ |
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45 final class TypeVersionMapper { |
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46 private static final class Singleton { |
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47 private final static TypeVersionMapper INSTANCE = new TypeVersionMapper(); |
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48 } |
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49 |
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50 final static String V5 = "J2SE 5.0"; |
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51 final static String V6 = "Java SE 6"; |
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52 |
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53 private final Map<String, Map<String, Predicate<String>>> filterMap; |
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54 |
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55 private TypeVersionMapper() { |
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56 filterMap = new HashMap<>(); |
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57 setupStackTraceElement(); |
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58 setupThreadInfo(); |
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59 } |
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60 |
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61 public static TypeVersionMapper getInstance() { |
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62 return Singleton.INSTANCE; |
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63 } |
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64 |
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65 private void setupStackTraceElement() { |
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66 Map<String, Predicate<String>> filter = new HashMap<>(); |
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67 filterMap.put(StackTraceElement.class.getName(), filter); |
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68 filter.put(V5, StackTraceElementCompositeData::isV6Attribute); |
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69 filter.put(V6, StackTraceElementCompositeData::isV6Attribute); |
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70 } |
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71 |
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72 private void setupThreadInfo() { |
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73 Map<String, Predicate<String>> filter = new HashMap<>(); |
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74 filterMap.put(ThreadInfo.class.getName(), filter); |
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75 filter.put(V5, ThreadInfoCompositeData::isV5Attribute); |
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76 filter.put(V6, ThreadInfoCompositeData::isV6Attribute); |
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77 } |
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78 |
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79 /** |
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80 * Retrieves the specified version of a {@linkplain CompositeType} instance. |
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81 * @param type The current (latest) version of {@linkplain CompositeType} |
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82 * @param version The version identifier (eg. {@linkplain TypeVersionMapper#V5}) |
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83 * @return Returns the {@linkplain CompositeType} corresponding to the requested |
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84 * version. |
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85 * @throws OpenDataException |
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86 */ |
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87 CompositeType getVersionedCompositeType(CompositeType type, String version) |
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88 throws OpenDataException |
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89 { |
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90 Predicate<String> filter = getFilter(type.getTypeName(), version); |
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91 if (filter == null) { |
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92 return type; |
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93 } |
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94 |
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95 List<String> itemNames = new ArrayList<>(); |
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96 List<String> itemDesc = new ArrayList<>(); |
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97 List<OpenType<?>> itemTypes = new ArrayList<>(); |
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98 |
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99 for(String item : type.keySet()) { |
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100 if (filter.test(item)) { |
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101 itemNames.add(item); |
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102 itemDesc.add(type.getDescription(item)); |
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103 itemTypes.add(getVersionedType( |
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104 type.getType(item), |
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105 version |
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106 )); |
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107 } |
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108 } |
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109 return new CompositeType( |
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110 type.getTypeName(), |
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111 version != null ? version + " " + type.getDescription() : type.getDescription(), |
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112 itemNames.toArray(new String[itemNames.size()]), |
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113 itemDesc.toArray(new String[itemDesc.size()]), |
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114 itemTypes.toArray(new OpenType<?>[itemTypes.size()]) |
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115 ); |
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116 } |
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117 |
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118 private OpenType<?> getVersionedType(OpenType<?> type, String version) |
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119 throws OpenDataException |
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120 { |
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121 if (type instanceof ArrayType) { |
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122 return getVersionedArrayType((ArrayType)type, version); |
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123 } |
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124 if (type instanceof CompositeType) { |
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125 return getVersionedCompositeType((CompositeType)type, version); |
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126 } |
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127 if (type instanceof TabularType) { |
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128 return getVersionedTabularType((TabularType)type, version); |
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129 } |
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130 return type; |
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131 } |
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132 |
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133 private ArrayType<?> getVersionedArrayType(ArrayType<?> type, String version) |
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134 throws OpenDataException |
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135 { |
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136 if (type.isPrimitiveArray()) { |
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137 return type; |
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138 } |
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139 OpenType<?> ot = getVersionedType( |
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140 type.getElementOpenType(), |
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141 version |
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142 ); |
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143 if (ot instanceof SimpleType) { |
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144 return new ArrayType<>((SimpleType<?>)ot, type.isPrimitiveArray()); |
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145 } else { |
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146 return new ArrayType<>(type.getDimension(), ot); |
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147 } |
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148 } |
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149 |
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150 private TabularType getVersionedTabularType(TabularType type, String version) |
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151 throws OpenDataException |
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152 { |
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153 CompositeType ct = getVersionedCompositeType( |
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154 type.getRowType(), |
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155 version |
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156 ); |
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157 |
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158 if (ct != null) { |
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159 return new TabularType( |
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160 type.getTypeName(), type.getDescription(), ct, |
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161 toStringArray(type.getIndexNames())); |
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162 } |
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163 return null; |
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164 } |
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165 |
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166 private Predicate<String> getFilter(String type, String version) { |
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167 Map<String, Predicate<String>> versionMap = filterMap.get(type); |
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168 if (versionMap == null) { |
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169 return null; |
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170 } |
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171 |
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172 return versionMap.get(version); |
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173 } |
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174 } |
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