1 /* 2 * Copyright (c) 2000, 2007, 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 27 package javax.management.openmbean; 28 29 30 // java import 31 // 32 33 34 // jmx import 35 // 36 import javax.management.MBeanAttributeInfo; 37 import javax.management.MBeanOperationInfo; 38 import javax.management.MBeanConstructorInfo; 39 import javax.management.MBeanNotificationInfo; 40 41 42 43 /** 44 * <p>Describes an Open MBean: an Open MBean is recognized as such if 45 * its {@link javax.management.DynamicMBean#getMBeanInfo() 46 * getMBeanInfo()} method returns an instance of a class which 47 * implements the {@link OpenMBeanInfo} interface, typically {@link 48 * OpenMBeanInfoSupport}.</p> 49 * 50 * <p>This interface declares the same methods as the class {@link 51 * javax.management.MBeanInfo}. A class implementing this interface 52 * (typically {@link OpenMBeanInfoSupport}) should extend {@link 53 * javax.management.MBeanInfo}.</p> 54 * 55 * <p>The {@link #getAttributes()}, {@link #getOperations()} and 56 * {@link #getConstructors()} methods of the implementing class should 57 * return at runtime an array of instances of a subclass of {@link 58 * MBeanAttributeInfo}, {@link MBeanOperationInfo} or {@link 59 * MBeanConstructorInfo} respectively which implement the {@link 60 * OpenMBeanAttributeInfo}, {@link OpenMBeanOperationInfo} or {@link 61 * OpenMBeanConstructorInfo} interface respectively. 62 * 63 * 64 * @since 1.5 65 */ 66 public interface OpenMBeanInfo { 67 68 // Re-declares the methods that are in class MBeanInfo of JMX 1.0 69 // (methods will be removed when MBeanInfo is made a parent interface of this interface) 70 71 /** 72 * Returns the fully qualified Java class name of the open MBean 73 * instances this <tt>OpenMBeanInfo</tt> describes. 74 * 75 * @return the class name. 76 */ 77 public String getClassName() ; 78 79 /** 80 * Returns a human readable description of the type of open MBean 81 * instances this <tt>OpenMBeanInfo</tt> describes. 82 * 83 * @return the description. 84 */ 85 public String getDescription() ; 86 87 /** 88 * Returns an array of <tt>OpenMBeanAttributeInfo</tt> instances 89 * describing each attribute in the open MBean described by this 90 * <tt>OpenMBeanInfo</tt> instance. Each instance in the returned 91 * array should actually be a subclass of 92 * <tt>MBeanAttributeInfo</tt> which implements the 93 * <tt>OpenMBeanAttributeInfo</tt> interface (typically {@link 94 * OpenMBeanAttributeInfoSupport}). 95 * 96 * @return the attribute array. 97 */ 98 public MBeanAttributeInfo[] getAttributes() ; 99 100 /** 101 * Returns an array of <tt>OpenMBeanOperationInfo</tt> instances 102 * describing each operation in the open MBean described by this 103 * <tt>OpenMBeanInfo</tt> instance. Each instance in the returned 104 * array should actually be a subclass of 105 * <tt>MBeanOperationInfo</tt> which implements the 106 * <tt>OpenMBeanOperationInfo</tt> interface (typically {@link 107 * OpenMBeanOperationInfoSupport}). 108 * 109 * @return the operation array. 110 */ 111 public MBeanOperationInfo[] getOperations() ; 112 113 /** 114 * Returns an array of <tt>OpenMBeanConstructorInfo</tt> instances 115 * describing each constructor in the open MBean described by this 116 * <tt>OpenMBeanInfo</tt> instance. Each instance in the returned 117 * array should actually be a subclass of 118 * <tt>MBeanConstructorInfo</tt> which implements the 119 * <tt>OpenMBeanConstructorInfo</tt> interface (typically {@link 120 * OpenMBeanConstructorInfoSupport}). 121 * 122 * @return the constructor array. 123 */ 124 public MBeanConstructorInfo[] getConstructors() ; 125 126 /** 127 * Returns an array of <tt>MBeanNotificationInfo</tt> instances 128 * describing each notification emitted by the open MBean 129 * described by this <tt>OpenMBeanInfo</tt> instance. 130 * 131 * @return the notification array. 132 */ 133 public MBeanNotificationInfo[] getNotifications() ; 134 135 136 // commodity methods 137 // 138 139 /** 140 * Compares the specified <var>obj</var> parameter with this <code>OpenMBeanInfo</code> instance for equality. 141 * <p> 142 * Returns <tt>true</tt> if and only if all of the following statements are true: 143 * <ul> 144 * <li><var>obj</var> is non null,</li> 145 * <li><var>obj</var> also implements the <code>OpenMBeanInfo</code> interface,</li> 146 * <li>their class names are equal</li> 147 * <li>their infos on attributes, constructors, operations and notifications are equal</li> 148 * </ul> 149 * This ensures that this <tt>equals</tt> method works properly for <var>obj</var> parameters which are 150 * different implementations of the <code>OpenMBeanInfo</code> interface. 151 * <br> 152 * @param obj the object to be compared for equality with this <code>OpenMBeanInfo</code> instance; 153 * 154 * @return <code>true</code> if the specified object is equal to this <code>OpenMBeanInfo</code> instance. 155 */ 156 public boolean equals(Object obj); 157 158 /** 159 * Returns the hash code value for this <code>OpenMBeanInfo</code> instance. 160 * <p> 161 * The hash code of an <code>OpenMBeanInfo</code> instance is the sum of the hash codes 162 * of all elements of information used in <code>equals</code> comparisons 163 * (ie: its class name, and its infos on attributes, constructors, operations and notifications, 164 * where the hashCode of each of these arrays is calculated by a call to 165 * <tt>new java.util.HashSet(java.util.Arrays.asList(this.getSignature)).hashCode()</tt>). 166 * <p> 167 * This ensures that <code> t1.equals(t2) </code> implies that <code> t1.hashCode()==t2.hashCode() </code> 168 * for any two <code>OpenMBeanInfo</code> instances <code>t1</code> and <code>t2</code>, 169 * as required by the general contract of the method 170 * {@link Object#hashCode() Object.hashCode()}. 171 * <p> 172 * 173 * @return the hash code value for this <code>OpenMBeanInfo</code> instance 174 */ 175 public int hashCode(); 176 177 /** 178 * Returns a string representation of this <code>OpenMBeanInfo</code> instance. 179 * <p> 180 * The string representation consists of the name of this class (ie <code>javax.management.openmbean.OpenMBeanInfo</code>), 181 * the MBean class name, 182 * and the string representation of infos on attributes, constructors, operations and notifications of the described MBean. 183 * 184 * @return a string representation of this <code>OpenMBeanInfo</code> instance 185 */ 186 public String toString(); 187 188 }