/*

 * Copyright (c) 1999, 2005, 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;

/**

 * Represents an MBean attribute by associating its name with its value.

 * The MBean server and other objects use this class to get and set attributes values.

 *

 * @since 1.5

 */

public class Attribute implements Serializable   {

    /* Serial version */

    private static final long serialVersionUID = 2484220110589082382L;

    /**

     * @serial Attribute name.

     */

    private String name;

    /**

     * @serial Attribute value

     */

    private Object value= null;

    /**

     * Constructs an Attribute object which associates the given attribute name with the given value.

     *

     * @param name A String containing the name of the attribute to be created. Cannot be null.

     * @param value The Object which is assigned to the attribute. This object must be of the same type as the attribute.

     *

     */

    public Attribute(String name, Object value) {

        if (name == null) {

            throw new RuntimeOperationsException(new IllegalArgumentException("Attribute name cannot be null "));

        }

        this.name = name;

        this.value = value;

    }

    /**

     * Returns a String containing the  name of the attribute.

     *

     * @return the name of the attribute.

     */

    public String getName()  {

        return name;

    }

    /**

     * Returns an Object that is the value of this attribute.

     *

     * @return the value of the attribute.

     */

    public Object getValue()  {

        return value;

    }

    /**

     * Compares the current Attribute Object with another Attribute Object.

     *

     * @param object  The Attribute that the current Attribute is to be compared with.

     *

     * @return  True if the two Attribute objects are equal, otherwise false.

     */

    public boolean equals(Object object)  {

        if (!(object instanceof Attribute)) {

            return false;

        }

        Attribute val = (Attribute) object;

        if (value == null) {

            if (val.getValue() == null) {

                return name.equals(val.getName());

            } else {

                return false;

            }

        }

        return ((name.equals(val.getName())) &&

                (value.equals(val.getValue())));

    }

    /**

     * Returns a hash code value for this attribute.

     *

     * @return a hash code value for this attribute.

     */

    public int hashCode() {

        return name.hashCode() ^ (value == null ? 0 : value.hashCode());

    }

    /**

     * Returns a String object representing this Attribute's value. The format of this

     * string is not specified, but users can expect that two Attributes return the

     * same string if and only if they are equal.

     */

    public String toString() {

        return getName() + " = " + getValue();

    }

 }