167 lines · 5.1 KB · Java
RawDownload
/* * Copyright (c) 1999, 2002, 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 com.sun.jndi.ldap; import java.io.IOException;import javax.naming.*;import javax.naming.directory.*; /** * This class implements the LDAPv3 Response Control for entry-change * notification as defined in * <a href="http://www.ietf.org/internet-drafts/draft-ietf-ldapext-psearch-02.txt">draft-ietf-ldapext-psearch-02.txt</a>. * * The control's value has the following ASN.1 definition: * <pre> * *     EntryChangeNotification ::= SEQUENCE { *         changeType ENUMERATED { *             add              (1), *             delete           (2), *             modify           (4), *             modDN            (8) *         }, *         previousDN   LDAPDN OPTIONAL,        -- modifyDN ops. only *         changeNumber INTEGER OPTIONAL,       -- if supported *    } * * </pre> * * @see PersistentSearchControl * @see com.sun.jndi.ldap.ctl.ResponseControlFactory ResponseControlFactory * @author Vincent Ryan */final public class EntryChangeResponseControl extends BasicControl {     /**     * The entry-change response control's assigned object identifier     * is 2.16.840.1.113730.3.4.7.     */    public static final String OID = "2.16.840.1.113730.3.4.7";     /**     * Indicates an entry which has been added.     */    public static final int ADD = 1;     /**     * Indicates an entry which has been deleted.     */    public static final int DELETE = 2;     /**     * Indicates an entry which has been modified.     */    public static final int MODIFY = 4;     /**     * Indicates an entry which has been renamed.     */    public static final int RENAME = 8;     /**     * The type of change that occurred.     *     * @serial     */    private int changeType;     /**     * The previous distinguished name (only applies to RENAME changes).     *     * @serial     */    private String previousDN = null;     /**     * The change number (if supported by the server).     *     * @serial     */    private long changeNumber = -1L;     private static final long serialVersionUID = -2087354136750180511L;     /**     * Constructs a new instance of EntryChangeResponseControl.     *     * @param   id              The control's object identifier string.     * @param   criticality     The control's criticality.     * @param   value           The control's ASN.1 BER encoded value.     *                          May be null.     * @exception               IOException if an error is encountered     *                          while decoding the control's value.     */    public EntryChangeResponseControl(String id, boolean criticality,        byte[] value) throws IOException {         super(id, criticality, value);         // decode value        if ((value != null) && (value.length > 0)) {            BerDecoder ber = new BerDecoder(value, 0, value.length);             ber.parseSeq(null);            changeType = ber.parseEnumeration();             if ((ber.bytesLeft() > 0) && (ber.peekByte() == Ber.ASN_OCTET_STR)){                previousDN = ber.parseString(true);            }            if ((ber.bytesLeft() > 0) && (ber.peekByte() == Ber.ASN_INTEGER)) {                changeNumber = ber.parseInt();            }        }    }     /**     * Retrieves the type of change that occurred.     *     * @return    The type of change.     */    public int getChangeType() {        return changeType;    }     /**     * Retrieves the previous distinguished name of the entry before it was     * renamed and/or moved. This method applies only to RENAME changes.     *     * @return    The previous distinguished name or null if not applicable.     */    public String getPreviousDN() {        return previousDN;    }     /**     * Retrieves the change number assigned by the server for this change.     * Returns -1 if this feature is not supported by the server.     *     * @return    The change number or -1 if unsupported.     */    public long getChangeNumber() {        return changeNumber;    }}