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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
draft-ietf-ldapext-psearch-02.txt.
The control's value has the following ASN.1 definition:
EntryChangeNotification ::= SEQUENCE {
changeType ENUMERATED {
add (1),
delete (2),
modify (4),
modDN (8)
},
previousDN LDAPDN OPTIONAL, -- modifyDN ops. only
changeNumber INTEGER OPTIONAL, -- if supported
}
Author: Vincent Ryan See Also: - PersistentSearchControl
- ResponseControlFactory
/**
* 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.
/**
* 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.
/**
* Indicates an entry which has been added.
*/
public static final int ADD = 1;
Indicates an entry which has been deleted.
/**
* Indicates an entry which has been deleted.
*/
public static final int DELETE = 2;
Indicates an entry which has been modified.
/**
* Indicates an entry which has been modified.
*/
public static final int MODIFY = 4;
Indicates an entry which has been renamed.
/**
* Indicates an entry which has been renamed.
*/
public static final int RENAME = 8;
The type of change that occurred.
@serial
/**
* The type of change that occurred.
*
* @serial
*/
private int changeType;
The previous distinguished name (only applies to RENAME changes).
@serial
/**
* The previous distinguished name (only applies to RENAME changes).
*
* @serial
*/
private String previousDN = null;
The change number (if supported by the server).
@serial
/**
* 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.
Params: - id – The control's object identifier string.
- criticality – The control's criticality.
- value – The control's ASN.1 BER encoded value.
May be null.
Throws: - IOException – if an error is encountered
while decoding the control's value.
/**
* 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.
Returns: The type of change.
/**
* 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.
Returns: The previous distinguished name or null if not applicable.
/**
* 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.
Returns: The change number or -1 if unsupported.
/**
* 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;
}
}