/* * Copyright (c) 1999, 2001, 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.naming.directory; /**  * This class represents a modification item.  * It consists of a modification code and an attribute on which to operate.  *<p>  * A ModificationItem instance is not synchronized against concurrent  * multithreaded access. Multiple threads trying to access and modify  * a single ModificationItem instance should lock the object.  *  * @author Rosanna Lee  * @author Scott Seligman  * @since 1.3  */ /*  *<p>  * The serialized form of a ModificationItem object consists of the  * modification op (and int) and the corresponding Attribute.*/ public class ModificationItem implements java.io.Serializable {    /**     * Contains an integer identify the modification     * to be performed.     * @serial     */    private int mod_op;    /**     * Contains the attribute identifying     * the attribute and/or its value to be applied for the modification.     * @serial     */    private Attribute attr;     /**      * Creates a new instance of ModificationItem.      * @param mod_op Modification to apply.  It must be one of:      *         DirContext.ADD_ATTRIBUTE      *         DirContext.REPLACE_ATTRIBUTE      *         DirContext.REMOVE_ATTRIBUTE      * @param attr     The non-null attribute to use for modification.      * @exception IllegalArgumentException If attr is null, or if mod_op is      *         not one of the ones specified above.      */    public ModificationItem(int mod_op, Attribute attr) {        switch (mod_op) {        case DirContext.ADD_ATTRIBUTE:        case DirContext.REPLACE_ATTRIBUTE:        case DirContext.REMOVE_ATTRIBUTE:            if (attr == null)                throw new IllegalArgumentException("Must specify non-null attribute for modification");             this.mod_op = mod_op;            this.attr = attr;            break;         default:            throw new IllegalArgumentException("Invalid modification code " + mod_op);        }    }     /**      * Retrieves the modification code of this modification item.      * @return The modification code.  It is one of:      *         DirContext.ADD_ATTRIBUTE      *         DirContext.REPLACE_ATTRIBUTE      *         DirContext.REMOVE_ATTRIBUTE      */    public int getModificationOp() {        return mod_op;    }     /**      * Retrieves the attribute associated with this modification item.      * @return The non-null attribute to use for the modification.      */    public Attribute getAttribute() {        return attr;    }     /**      * Generates the string representation of this modification item,      * which consists of the modification operation and its related attribute.      * The string representation is meant for debugging and not to be      * interpreted programmatically.      *      * @return The non-null string representation of this modification item.      */    public String toString() {        switch (mod_op) {        case DirContext.ADD_ATTRIBUTE:            return ("Add attribute: " + attr.toString());         case DirContext.REPLACE_ATTRIBUTE:            return ("Replace attribute: " + attr.toString());         case DirContext.REMOVE_ATTRIBUTE:            return ("Remove attribute: " + attr.toString());        }        return "";      // should never happen    }     /**     * Use serialVersionUID from JNDI 1.1.1 for interoperability     */    private static final long serialVersionUID = 7573258562534746850L;}