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| 1 | +/* | |
| 2 | + * Copyright (c) 2004, 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.io.Serializable; | |
| 29 | +import java.util.*; | |
| 30 | +import javax.management.openmbean.CompositeData; | |
| 31 | +import javax.management.openmbean.CompositeType; | |
| 32 | +import javax.management.openmbean.OpenType; | |
| 33 | +import javax.management.openmbean.TabularType; | |
| 34 | + | |
| 35 | +/** | |
| 36 | + * This abstract class provides the implementation of the CompositeData | |
| 37 | + * interface. A CompositeData object will be lazily created only when | |
| 38 | + * the CompositeData interface is used. | |
| 39 | + * | |
| 40 | + * Classes that extends this abstract class will implement the | |
| 41 | + * getCompositeData() method. The object returned by the | |
| 42 | + * getCompositeData() is an instance of CompositeData such that | |
| 43 | + * the instance serializes itself as the type CompositeDataSupport. | |
| 44 | + */ | |
| 45 | +public abstract class LazyCompositeData | |
| 46 | + implements CompositeData, Serializable { | |
| 47 | + | |
| 48 | + private CompositeData compositeData; | |
| 49 | + | |
| 50 | + // Implementation of the CompositeData interface | |
| 51 | + public boolean containsKey(String key) { | |
| 52 | + return compositeData().containsKey(key); | |
| 53 | + } | |
| 54 | + | |
| 55 | + public boolean containsValue(Object value) { | |
| 56 | + return compositeData().containsValue(value); | |
| 57 | + } | |
| 58 | + | |
| 59 | + public boolean equals(Object obj) { | |
| 60 | + return compositeData().equals(obj); | |
| 61 | + } | |
| 62 | + | |
| 63 | + public Object get(String key) { | |
| 64 | + return compositeData().get(key); | |
| 65 | + } | |
| 66 | + | |
| 67 | + public Object[] getAll(String[] keys) { | |
| 68 | + return compositeData().getAll(keys); | |
| 69 | + } | |
| 70 | + | |
| 71 | + public CompositeType getCompositeType() { | |
| 72 | + return compositeData().getCompositeType(); | |
| 73 | + } | |
| 74 | + | |
| 75 | + public int hashCode() { | |
| 76 | + return compositeData().hashCode(); | |
| 77 | + } | |
| 78 | + | |
| 79 | + public String toString() { | |
| 80 | + /** FIXME: What should this be?? */ | |
| 81 | + return compositeData().toString(); | |
| 82 | + } | |
| 83 | + | |
| 84 | + public Collection values() { | |
| 85 | + return compositeData().values(); | |
| 86 | + } | |
| 87 | + | |
| 88 | + /* Lazy creation of a CompositeData object | |
| 89 | + * only when the CompositeData interface is used. | |
| 90 | + */ | |
| 91 | + private synchronized CompositeData compositeData() { | |
| 92 | + if (compositeData != null) | |
| 93 | + return compositeData; | |
| 94 | + compositeData = getCompositeData(); | |
| 95 | + return compositeData; | |
| 96 | + } | |
| 97 | + | |
| 98 | + /** | |
| 99 | + * Designate to a CompositeData object when writing to an | |
| 100 | + * output stream during serialization so that the receiver | |
| 101 | + * only requires JMX 1.2 classes but not any implementation | |
| 102 | + * specific class. | |
| 103 | + */ | |
| 104 | + protected Object writeReplace() throws java.io.ObjectStreamException { | |
| 105 | + return compositeData(); | |
| 106 | + } | |
| 107 | + | |
| 108 | + /** | |
| 109 | + * Returns the CompositeData representing this object. | |
| 110 | + * The returned CompositeData object must be an instance | |
| 111 | + * of javax.management.openmbean.CompositeDataSupport class | |
| 112 | + * so that no implementation specific class is required | |
| 113 | + * for unmarshalling besides JMX 1.2 classes. | |
| 114 | + */ | |
| 115 | + protected abstract CompositeData getCompositeData(); | |
| 116 | + | |
| 117 | + // Helper methods | |
| 118 | + static String getString(CompositeData cd, String itemName) { | |
| 119 | + if (cd == null) | |
| 120 | + throw new IllegalArgumentException("Null CompositeData"); | |
| 121 | + | |
| 122 | + return (String) cd.get(itemName); | |
| 123 | + } | |
| 124 | + | |
| 125 | + static boolean getBoolean(CompositeData cd, String itemName) { | |
| 126 | + if (cd == null) | |
| 127 | + throw new IllegalArgumentException("Null CompositeData"); | |
| 128 | + | |
| 129 | + return ((Boolean) cd.get(itemName)).booleanValue(); | |
| 130 | + } | |
| 131 | + | |
| 132 | + static long getLong(CompositeData cd, String itemName) { | |
| 133 | + if (cd == null) | |
| 134 | + throw new IllegalArgumentException("Null CompositeData"); | |
| 135 | + | |
| 136 | + return ((Long) cd.get(itemName)).longValue(); | |
| 137 | + } | |
| 138 | + | |
| 139 | + static int getInt(CompositeData cd, String itemName) { | |
| 140 | + if (cd == null) | |
| 141 | + throw new IllegalArgumentException("Null CompositeData"); | |
| 142 | + | |
| 143 | + return ((Integer) cd.get(itemName)).intValue(); | |
| 144 | + } | |
| 145 | + | |
| 146 | + /** | |
| 147 | + * Compares two CompositeTypes and returns true if | |
| 148 | + * all items in type1 exist in type2 and their item types | |
| 149 | + * are the same. | |
| 150 | + */ | |
| 151 | + protected static boolean isTypeMatched(CompositeType type1, CompositeType type2) { | |
| 152 | + if (type1 == type2) return true; | |
| 153 | + | |
| 154 | + // We can't use CompositeType.isValue() since it returns false | |
| 155 | + // if the type name doesn't match. | |
| 156 | + Set allItems = type1.keySet(); | |
| 157 | + | |
| 158 | + // Check all items in the type1 exist in type2 | |
| 159 | + if (!type2.keySet().containsAll(allItems)) | |
| 160 | + return false; | |
| 161 | + | |
| 162 | + for (Iterator iter = allItems.iterator(); iter.hasNext(); ) { | |
| 163 | + String item = (String) iter.next(); | |
| 164 | + OpenType ot1 = type1.getType(item); | |
| 165 | + OpenType ot2 = type2.getType(item); | |
| 166 | + if (ot1 instanceof CompositeType) { | |
| 167 | + if (! (ot2 instanceof CompositeType)) | |
| 168 | + return false; | |
| 169 | + if (!isTypeMatched((CompositeType) ot1, (CompositeType) ot2)) | |
| 170 | + return false; | |
| 171 | + } else if (ot1 instanceof TabularType) { | |
| 172 | + if (! (ot2 instanceof TabularType)) | |
| 173 | + return false; | |
| 174 | + if (!isTypeMatched((TabularType) ot1, (TabularType) ot2)) | |
| 175 | + return false; | |
| 176 | + } else if (!ot1.equals(ot2)) { | |
| 177 | + return false; | |
| 178 | + } | |
| 179 | + } | |
| 180 | + return true; | |
| 181 | + } | |
| 182 | + | |
| 183 | + protected static boolean isTypeMatched(TabularType type1, TabularType type2) { | |
| 184 | + if (type1 == type2) return true; | |
| 185 | + | |
| 186 | + List list1 = type1.getIndexNames(); | |
| 187 | + List list2 = type2.getIndexNames(); | |
| 188 | + | |
| 189 | + // check if the list of index names are the same | |
| 190 | + if (!list1.equals(list2)) | |
| 191 | + return false; | |
| 192 | + | |
| 193 | + return isTypeMatched(type1.getRowType(), type2.getRowType()); | |
| 194 | + } | |
| 195 | + | |
| 196 | + private static final long serialVersionUID = -2190411934472666714L; | |
| 197 | +} | |