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/* **************************************************************************
* $OpenLDAP$
*
* Copyright (C) 1999, 2000, 2001 Novell, Inc. All Rights Reserved.
*
* THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND
* TREATIES. USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT
* TO VERSION 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS
* AVAILABLE AT HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE"
* IN THE TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION
* OF THIS WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP
* PUBLIC LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT
* THE PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
******************************************************************************/
package com.novell.ldap.rfc2251;
import java.io.IOException;
import java.io.InputStream;
import com.novell.ldap.asn1.*;
/**
* Represents an LDAP Control.
*
*
*/
public class RfcControl extends ASN1Sequence {
//*************************************************************************
// Constructors for Control
//*************************************************************************
/**
*
*/
public RfcControl(RfcLDAPOID controlType)
{
this(controlType, new ASN1Boolean(false), null);
}
/**
*
*/
public RfcControl(RfcLDAPOID controlType, ASN1Boolean criticality)
{
this(controlType, criticality, null);
}
/**
*
* Note: criticality is only added if true, as per RFC 2251 sec 5.1 part
* (4): If a value of a type is its default value, it MUST be
* absent.
*/
public RfcControl(RfcLDAPOID controlType, ASN1Boolean criticality,
ASN1OctetString controlValue)
{
super(3);
add(controlType);
if(criticality.booleanValue() == true)
add(criticality);
if(controlValue != null)
add(controlValue);
}
/**
* Constructs a Control object by decoding it from an InputStream.
*/
public RfcControl(ASN1Decoder dec, InputStream in, int len)
throws IOException
{
super(dec, in, len);
}
/**
* Constructs a Control object by decoding from an ASN1Sequence
*/
public RfcControl(ASN1Sequence seqObj)
throws IOException
{
super(3);
int len = seqObj.size();
for (int i = 0; i < len; i++)
add(seqObj.get(i));
}
//*************************************************************************
// Accessors
//*************************************************************************
/**
*
*/
public final ASN1OctetString getControlType()
{
return (ASN1OctetString)get(0);
}
/**
* Returns criticality.
*
* If no value present, return the default value of FALSE.
*/
public final ASN1Boolean getCriticality()
{
if(size() > 1) { // MAY be a criticality
ASN1Object obj = get(1);
if(obj instanceof ASN1Boolean)
return (ASN1Boolean)obj;
}
return new ASN1Boolean(false);
}
/**
* Since controlValue is an OPTIONAL component, we need to check
* to see if one is available. Remember that if criticality is of default
* value, it will not be present.
*/
public final ASN1OctetString getControlValue()
{
if(size() > 2) { // MUST be a control value
return (ASN1OctetString)get(2);
}
else if(size() > 1) { // MAY be a control value
ASN1Object obj = get(1);
if(obj instanceof ASN1OctetString)
return (ASN1OctetString)obj;
}
return null;
}
/**
* Called to set/replace the ControlValue. Will normally be called by
* the child classes after the parent has been instantiated.
*/
public final void setControlValue(ASN1OctetString controlValue)
{
if (controlValue == null)
return;
if(size() == 3) {
// We already have a control value, replace it
set(2, controlValue);
return;
}
if (size() == 2) {
// Get the second element
ASN1Object obj = get(1);
// Is this a control value
if(obj instanceof ASN1OctetString) {
// replace this one
set(1, controlValue);
return;
}
else {
// add a new one at the end
add(controlValue);
return;
}
}
else if (size() ==1 )
{ // in case iscritical is false
// add a new one at the end
add(controlValue);
return;
}
}
}
