/*

 * Copyright (c) 1999, 2004, 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;

// java import

import java.io.Serializable;

// RI import

import javax.management.ObjectName;

/**

 * Used to represent the object name of an MBean and its class name.

 * If the MBean is a Dynamic MBean the class name should be retrieved from

 * the <CODE>MBeanInfo</CODE> it provides.

 *

 * @since 1.5

 */

public class ObjectInstance implements Serializable   {

    /* Serial version */

    private static final long serialVersionUID = -4099952623687795850L;

    /**

     * @serial Object name.

     */

    private ObjectName name;

    /**

     * @serial Class name.

     */

    private String className;

    /**

     * Allows an object instance to be created given a string representation of

     * an object name and the full class name, including the package name.

     *

     * @param objectName  A string representation of the object name.

     * @param className The full class name, including the package

     * name, of the object instance.  If the MBean is a Dynamic MBean

     * the class name corresponds to its {@link

     * DynamicMBean#getMBeanInfo()

     * getMBeanInfo()}<code>.getClassName()</code>.

     *

     * @exception MalformedObjectNameException The string passed as a

     * parameter does not have the right format.

     *

     */

    public ObjectInstance(String objectName, String className)

            throws MalformedObjectNameException {

        this(new ObjectName(objectName), className);

    }

    /**

     * Allows an object instance to be created given an object name and

     * the full class name, including the package name.

     *

     * @param objectName  The object name.

     * @param className  The full class name, including the package

     * name, of the object instance.  If the MBean is a Dynamic MBean

     * the class name corresponds to its {@link

     * DynamicMBean#getMBeanInfo()

     * getMBeanInfo()}<code>.getClassName()</code>.

     * If the MBean is a Dynamic MBean the class name should be retrieved

     * from the <CODE>MBeanInfo</CODE> it provides.

     *

     */

    public ObjectInstance(ObjectName objectName, String className) {

        if (objectName.isPattern()) {

            final IllegalArgumentException iae =

                new IllegalArgumentException("Invalid name->"+

                                             objectName.toString());

            throw new RuntimeOperationsException(iae);

        }

        this.name= objectName;

        this.className= className;

    }

    /**

     * Compares the current object instance with another object instance.

     *

     * @param object  The object instance that the current object instance is

     *     to be compared with.

     *

     * @return  True if the two object instances are equal, otherwise false.

     */

    public boolean equals(Object object)  {

        if (!(object instanceof ObjectInstance)) {

            return false;

        }

        ObjectInstance val = (ObjectInstance) object;

        if (! name.equals(val.getObjectName())) return false;

        if (className == null)

            return (val.getClassName() == null);

        return className.equals(val.getClassName());

    }

    public int hashCode() {

        final int classHash = ((className==null)?0:className.hashCode());

        return name.hashCode() ^ classHash;

    }

    /**

     * Returns the object name part.

     *

     * @return the object name.

     */

    public ObjectName getObjectName()  {

        return name;

    }

    /**

     * Returns the class part.

     *

     * @return the class name.

     */

    public String getClassName()  {

        return className;

    }

    /**

     * Returns a string representing this ObjectInstance object. The format of this string

     * is not specified, but users can expect that two ObjectInstances return the same

     * string if and only if they are equal.

     */

    public String toString() {

        return getClassName() + "[" + getObjectName() + "]";

    }

 }