/* * Copyright (c) 2000, 2007, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */  package javax.management.openmbean;  // java import//  // jmx import//import javax.management.MBeanAttributeInfo;import javax.management.MBeanOperationInfo;import javax.management.MBeanConstructorInfo;import javax.management.MBeanNotificationInfo;   /** * <p>Describes an Open MBean: an Open MBean is recognized as such if * its {@link javax.management.DynamicMBean#getMBeanInfo() * getMBeanInfo()} method returns an instance of a class which * implements the {@link OpenMBeanInfo} interface, typically {@link * OpenMBeanInfoSupport}.</p> * * <p>This interface declares the same methods as the class {@link * javax.management.MBeanInfo}.  A class implementing this interface * (typically {@link OpenMBeanInfoSupport}) should extend {@link * javax.management.MBeanInfo}.</p> * * <p>The {@link #getAttributes()}, {@link #getOperations()} and * {@link #getConstructors()} methods of the implementing class should * return at runtime an array of instances of a subclass of {@link * MBeanAttributeInfo}, {@link MBeanOperationInfo} or {@link * MBeanConstructorInfo} respectively which implement the {@link * OpenMBeanAttributeInfo}, {@link OpenMBeanOperationInfo} or {@link * OpenMBeanConstructorInfo} interface respectively. * * * @since 1.5 */public interface OpenMBeanInfo {     // Re-declares the methods that are in class MBeanInfo of JMX 1.0    // (methods will be removed when MBeanInfo is made a parent interface of this interface)     /**     * Returns the fully qualified Java class name of the open MBean     * instances this <tt>OpenMBeanInfo</tt> describes.     *     * @return the class name.     */    public String getClassName() ;     /**     * Returns a human readable description of the type of open MBean     * instances this <tt>OpenMBeanInfo</tt> describes.     *     * @return the description.     */    public String getDescription() ;     /**     * Returns an array of <tt>OpenMBeanAttributeInfo</tt> instances     * describing each attribute in the open MBean described by this     * <tt>OpenMBeanInfo</tt> instance.  Each instance in the returned     * array should actually be a subclass of     * <tt>MBeanAttributeInfo</tt> which implements the     * <tt>OpenMBeanAttributeInfo</tt> interface (typically {@link     * OpenMBeanAttributeInfoSupport}).     *     * @return the attribute array.     */    public MBeanAttributeInfo[] getAttributes() ;     /**     * Returns an array of <tt>OpenMBeanOperationInfo</tt> instances     * describing each operation in the open MBean described by this     * <tt>OpenMBeanInfo</tt> instance.  Each instance in the returned     * array should actually be a subclass of     * <tt>MBeanOperationInfo</tt> which implements the     * <tt>OpenMBeanOperationInfo</tt> interface (typically {@link     * OpenMBeanOperationInfoSupport}).     *     * @return the operation array.     */    public MBeanOperationInfo[] getOperations() ;     /**     * Returns an array of <tt>OpenMBeanConstructorInfo</tt> instances     * describing each constructor in the open MBean described by this     * <tt>OpenMBeanInfo</tt> instance.  Each instance in the returned     * array should actually be a subclass of     * <tt>MBeanConstructorInfo</tt> which implements the     * <tt>OpenMBeanConstructorInfo</tt> interface (typically {@link     * OpenMBeanConstructorInfoSupport}).     *     * @return the constructor array.     */    public MBeanConstructorInfo[] getConstructors() ;     /**     * Returns an array of <tt>MBeanNotificationInfo</tt> instances     * describing each notification emitted by the open MBean     * described by this <tt>OpenMBeanInfo</tt> instance.     *     * @return the notification array.     */    public MBeanNotificationInfo[] getNotifications() ;      // commodity methods    //     /**     * Compares the specified <var>obj</var> parameter with this <code>OpenMBeanInfo</code> instance for equality.     * <p>     * Returns <tt>true</tt> if and only if all of the following statements are true:     * <ul>     * <li><var>obj</var> is non null,</li>     * <li><var>obj</var> also implements the <code>OpenMBeanInfo</code> interface,</li>     * <li>their class names are equal</li>     * <li>their infos on attributes, constructors, operations and notifications are equal</li>     * </ul>     * This ensures that this <tt>equals</tt> method works properly for <var>obj</var> parameters which are     * different implementations of the <code>OpenMBeanInfo</code> interface.     * <br>&nbsp;     * @param  obj  the object to be compared for equality with this <code>OpenMBeanInfo</code> instance;     *     * @return  <code>true</code> if the specified object is equal to this <code>OpenMBeanInfo</code> instance.     */    public boolean equals(Object obj);     /**     * Returns the hash code value for this <code>OpenMBeanInfo</code> instance.     * <p>     * The hash code of an <code>OpenMBeanInfo</code> instance is the sum of the hash codes     * of all elements of information used in <code>equals</code> comparisons     * (ie: its class name, and its infos on attributes, constructors, operations and notifications,     * where the hashCode of each of these arrays is calculated by a call to     *  <tt>new java.util.HashSet(java.util.Arrays.asList(this.getSignature)).hashCode()</tt>).     * <p>     * This ensures that <code> t1.equals(t2) </code> implies that <code> t1.hashCode()==t2.hashCode() </code>     * for any two <code>OpenMBeanInfo</code> instances <code>t1</code> and <code>t2</code>,     * as required by the general contract of the method     * {@link Object#hashCode() Object.hashCode()}.     * <p>     *     * @return  the hash code value for this <code>OpenMBeanInfo</code> instance     */    public int hashCode();     /**     * Returns a string representation of this <code>OpenMBeanInfo</code> instance.     * <p>     * The string representation consists of the name of this class (ie <code>javax.management.openmbean.OpenMBeanInfo</code>),     * the MBean class name,     * and the string representation of infos on attributes, constructors, operations and notifications of the described MBean.     *     * @return  a string representation of this <code>OpenMBeanInfo</code> instance     */    public String toString(); }