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1 /* |
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2 * Copyright 2004 Sun Microsystems, Inc. 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. Sun designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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22 * CA 95054 USA or visit www.sun.com if you need additional information or |
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23 * have any questions. |
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24 */ |
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25 |
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26 package sun.management; |
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27 |
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28 import java.io.Serializable; |
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29 import java.util.*; |
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30 import javax.management.openmbean.CompositeData; |
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31 import javax.management.openmbean.CompositeType; |
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32 import javax.management.openmbean.OpenType; |
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33 import javax.management.openmbean.TabularType; |
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34 |
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35 /** |
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36 * This abstract class provides the implementation of the CompositeData |
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37 * interface. A CompositeData object will be lazily created only when |
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38 * the CompositeData interface is used. |
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39 * |
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40 * Classes that extends this abstract class will implement the |
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41 * getCompositeData() method. The object returned by the |
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42 * getCompositeData() is an instance of CompositeData such that |
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43 * the instance serializes itself as the type CompositeDataSupport. |
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44 */ |
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45 public abstract class LazyCompositeData |
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46 implements CompositeData, Serializable { |
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47 |
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48 private CompositeData compositeData; |
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49 |
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50 // Implementation of the CompositeData interface |
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51 public boolean containsKey(String key) { |
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52 return compositeData().containsKey(key); |
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53 } |
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54 |
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55 public boolean containsValue(Object value) { |
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56 return compositeData().containsValue(value); |
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57 } |
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58 |
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59 public boolean equals(Object obj) { |
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60 return compositeData().equals(obj); |
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61 } |
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62 |
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63 public Object get(String key) { |
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64 return compositeData().get(key); |
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65 } |
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66 |
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67 public Object[] getAll(String[] keys) { |
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68 return compositeData().getAll(keys); |
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69 } |
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70 |
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71 public CompositeType getCompositeType() { |
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72 return compositeData().getCompositeType(); |
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73 } |
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74 |
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75 public int hashCode() { |
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76 return compositeData().hashCode(); |
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77 } |
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78 |
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79 public String toString() { |
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80 /** FIXME: What should this be?? */ |
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81 return compositeData().toString(); |
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82 } |
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83 |
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84 public Collection values() { |
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85 return compositeData().values(); |
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86 } |
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87 |
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88 /* Lazy creation of a CompositeData object |
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89 * only when the CompositeData interface is used. |
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90 */ |
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91 private synchronized CompositeData compositeData() { |
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92 if (compositeData != null) |
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93 return compositeData; |
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94 compositeData = getCompositeData(); |
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95 return compositeData; |
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96 } |
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97 |
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98 /** |
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99 * Designate to a CompositeData object when writing to an |
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100 * output stream during serialization so that the receiver |
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101 * only requires JMX 1.2 classes but not any implementation |
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102 * specific class. |
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103 */ |
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104 protected Object writeReplace() throws java.io.ObjectStreamException { |
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105 return compositeData(); |
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106 } |
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107 |
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108 /** |
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109 * Returns the CompositeData representing this object. |
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110 * The returned CompositeData object must be an instance |
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111 * of javax.management.openmbean.CompositeDataSupport class |
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112 * so that no implementation specific class is required |
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113 * for unmarshalling besides JMX 1.2 classes. |
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114 */ |
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115 protected abstract CompositeData getCompositeData(); |
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116 |
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117 // Helper methods |
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118 static String getString(CompositeData cd, String itemName) { |
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119 if (cd == null) |
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120 throw new IllegalArgumentException("Null CompositeData"); |
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121 |
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122 return (String) cd.get(itemName); |
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123 } |
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124 |
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125 static boolean getBoolean(CompositeData cd, String itemName) { |
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126 if (cd == null) |
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127 throw new IllegalArgumentException("Null CompositeData"); |
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128 |
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129 return ((Boolean) cd.get(itemName)).booleanValue(); |
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130 } |
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131 |
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132 static long getLong(CompositeData cd, String itemName) { |
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133 if (cd == null) |
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134 throw new IllegalArgumentException("Null CompositeData"); |
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135 |
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136 return ((Long) cd.get(itemName)).longValue(); |
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137 } |
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138 |
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139 static int getInt(CompositeData cd, String itemName) { |
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140 if (cd == null) |
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141 throw new IllegalArgumentException("Null CompositeData"); |
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142 |
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143 return ((Integer) cd.get(itemName)).intValue(); |
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144 } |
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145 |
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146 /** |
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147 * Compares two CompositeTypes and returns true if |
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148 * all items in type1 exist in type2 and their item types |
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149 * are the same. |
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150 */ |
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151 protected static boolean isTypeMatched(CompositeType type1, CompositeType type2) { |
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152 if (type1 == type2) return true; |
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153 |
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154 // We can't use CompositeType.isValue() since it returns false |
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155 // if the type name doesn't match. |
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156 Set allItems = type1.keySet(); |
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157 |
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158 // Check all items in the type1 exist in type2 |
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159 if (!type2.keySet().containsAll(allItems)) |
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160 return false; |
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161 |
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162 for (Iterator iter = allItems.iterator(); iter.hasNext(); ) { |
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163 String item = (String) iter.next(); |
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164 OpenType ot1 = type1.getType(item); |
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165 OpenType ot2 = type2.getType(item); |
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166 if (ot1 instanceof CompositeType) { |
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167 if (! (ot2 instanceof CompositeType)) |
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168 return false; |
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169 if (!isTypeMatched((CompositeType) ot1, (CompositeType) ot2)) |
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170 return false; |
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171 } else if (ot1 instanceof TabularType) { |
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172 if (! (ot2 instanceof TabularType)) |
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173 return false; |
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174 if (!isTypeMatched((TabularType) ot1, (TabularType) ot2)) |
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175 return false; |
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176 } else if (!ot1.equals(ot2)) { |
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177 return false; |
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178 } |
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179 } |
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180 return true; |
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181 } |
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182 |
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183 protected static boolean isTypeMatched(TabularType type1, TabularType type2) { |
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184 if (type1 == type2) return true; |
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185 |
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186 List list1 = type1.getIndexNames(); |
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187 List list2 = type2.getIndexNames(); |
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188 |
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189 // check if the list of index names are the same |
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190 if (!list1.equals(list2)) |
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191 return false; |
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192 |
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193 return isTypeMatched(type1.getRowType(), type2.getRowType()); |
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194 } |
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195 } |