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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * 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,

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 *

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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 {@code OpenMBeanInfo} describes.

     *

     * @return the class name.

     */

    public String getClassName() ;

    /**

     * Returns a human readable description of the type of open MBean

     * instances this {@code OpenMBeanInfo} describes.

     *

     * @return the description.

     */

    public String getDescription() ;

    /**

     * Returns an array of {@code OpenMBeanAttributeInfo} instances

     * describing each attribute in the open MBean described by this

     * {@code OpenMBeanInfo} instance.  Each instance in the returned

     * array should actually be a subclass of

     * {@code MBeanAttributeInfo} which implements the

     * {@code OpenMBeanAttributeInfo} interface (typically {@link

     * OpenMBeanAttributeInfoSupport}).

     *

     * @return the attribute array.

     */

    public MBeanAttributeInfo[] getAttributes() ;

    /**

     * Returns an array of {@code OpenMBeanOperationInfo} instances

     * describing each operation in the open MBean described by this

     * {@code OpenMBeanInfo} instance.  Each instance in the returned

     * array should actually be a subclass of

     * {@code MBeanOperationInfo} which implements the

     * {@code OpenMBeanOperationInfo} interface (typically {@link

     * OpenMBeanOperationInfoSupport}).

     *

     * @return the operation array.

     */

    public MBeanOperationInfo[] getOperations() ;

    /**

     * Returns an array of {@code OpenMBeanConstructorInfo} instances

     * describing each constructor in the open MBean described by this

     * {@code OpenMBeanInfo} instance.  Each instance in the returned

     * array should actually be a subclass of

     * {@code MBeanConstructorInfo} which implements the

     * {@code OpenMBeanConstructorInfo} interface (typically {@link

     * OpenMBeanConstructorInfoSupport}).

     *

     * @return the constructor array.

     */

    public MBeanConstructorInfo[] getConstructors() ;

    /**

     * Returns an array of {@code MBeanNotificationInfo} instances

     * describing each notification emitted by the open MBean

     * described by this {@code OpenMBeanInfo} instance.

     *

     * @return the notification array.

     */

    public MBeanNotificationInfo[] getNotifications() ;

    // commodity methods

    //

    /**

     * Compares the specified <var>obj</var> parameter with this {@code OpenMBeanInfo} instance for equality.

     * <p>

     * Returns {@code true} 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} 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 {@code equals} method works properly for <var>obj</var> parameters which are

     * different implementations of the {@code OpenMBeanInfo} interface.

     *

     * @param  obj  the object to be compared for equality with this {@code OpenMBeanInfo} instance;

     *

     * @return  {@code true} if the specified object is equal to this {@code OpenMBeanInfo} instance.

     */

    public boolean equals(Object obj);

    /**

     * Returns the hash code value for this {@code OpenMBeanInfo} instance.

     * <p>

     * The hash code of an {@code OpenMBeanInfo} instance is the sum of the hash codes

     * of all elements of information used in {@code equals} 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

     * {@code new java.util.HashSet(java.util.Arrays.asList(this.getSignature)).hashCode()}).

     * <p>

     * This ensures that {@code t1.equals(t2)} implies that {@code t1.hashCode()==t2.hashCode()}

     * for any two {@code OpenMBeanInfo} instances {@code t1} and {@code t2},

     * as required by the general contract of the method

     * {@link Object#hashCode() Object.hashCode()}.

     *

     * @return  the hash code value for this {@code OpenMBeanInfo} instance

     */

    public int hashCode();

    /**

     * Returns a string representation of this {@code OpenMBeanInfo} instance.

     * <p>

     * The string representation consists of the name of this class

     * (ie {@code javax.management.openmbean.OpenMBeanInfo}), 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} instance

     */

    public String toString();

}