org.apache.directory.shared.ldap.codec.controls
Class AbstractControl

java.lang.Object
  org.apache.directory.shared.asn1.AbstractAsn1Object
      org.apache.directory.shared.ldap.codec.controls.AbstractControl

All Implemented Interfaces:

Asn1Object, CodecControl, Control

Direct Known Subclasses:

CascadeControl, ControlImpl, EntryChangeControl, ManageDsaITControl, PagedResultsControl, PersistentSearchControl, SubentriesControl, SyncDoneValueControl, SyncInfoValueControl, SyncRequestValueControl, SyncStateValueControl

public abstract class AbstractControl
extends AbstractAsn1Object
implements Control, CodecControl

A Asn1Object to store a Control.

Version:

$Rev: 912399 $, $Date: 2010-02-21 21:52:31 +0100 (Dim, 21 fév 2010) $,

Author:

Apache Directory Project

Field Summary

protected ControlDecoder	decoder
protected byte[]	value Optional control value
protected int	valueLength The encoded value length

Fields inherited from class org.apache.directory.shared.asn1.AbstractAsn1Object

parent

Constructor Summary

AbstractControl(String oid)
Default constructor.

Method Summary

int	computeLength() Compute the Control length
int	computeLength(int valueLength)
ByteBuffer	encode(ByteBuffer buffer) Generate the PDU which contains the Control.
ControlDecoder	getDecoder() Get the associated decoder
String	getOid() Get the OID
byte[]	getValue() Get the control value
boolean	hasValue() Tells if the Control has a value or not
boolean	isCritical() Get the criticality
void	setCritical(boolean criticality) Set the criticality
void	setValue(byte[] value) Set the encoded control value
String	toString() Return a String representing a Control

Methods inherited from class org.apache.directory.shared.asn1.AbstractAsn1Object

addLength, getCurrentLength, getExpectedLength, getParent, getTlvId, setCurrentLength, setExpectedLength, setParent

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

value

protected byte[] value

Optional control value

valueLength

protected int valueLength

The encoded value length

decoder

protected ControlDecoder decoder

Constructor Detail

AbstractControl

public AbstractControl(String oid)

Default constructor.

Method Detail

getOid

public String getOid()

Get the OID

Specified by:

getOid in interface Control

Returns:

A string which represent the control oid

getValue

public byte[] getValue()

Get the control value

Specified by:

getValue in interface Control

Returns:

The control value

setValue

public void setValue(byte[] value)

Set the encoded control value

Specified by:

setValue in interface Control

Parameters:

encodedValue - The encoded control value to store

isCritical

public boolean isCritical()

Get the criticality

Specified by:

isCritical in interface Control

Returns:

true if the criticality flag is true.

setCritical

public void setCritical(boolean criticality)

Set the criticality

Specified by:

setCritical in interface Control

Parameters:

criticality - The criticality value

computeLength

public int computeLength()

Compute the Control length

 
 Control :
 
 0x30 L1
  |
  +--> 0x04 L2 controlType
 [+--> 0x01 0x01 criticality]
 [+--> 0x04 L3 controlValue] 
 
 Control length = Length(0x30) + length(L1) 
                  + Length(0x04) + Length(L2) + L2
                  [+ Length(0x01) + 1 + 1]
                  [+ Length(0x04) + Length(L3) + L3]
 

Specified by:

computeLength in interface Asn1Object

Specified by:

computeLength in interface CodecControl

Specified by:

computeLength in class AbstractAsn1Object

computeLength

public int computeLength(int valueLength)

encode

public ByteBuffer encode(ByteBuffer buffer)
                  throws EncoderException

Generate the PDU which contains the Control.

 
 Control : 
 
 0x30 LL
   0x04 LL type 
   [0x01 0x01 criticality]
   [0x04 LL value]
 

Specified by:

encode in interface Asn1Object

Specified by:

encode in interface CodecControl

Overrides:

encode in class AbstractAsn1Object

Parameters:

buffer - The encoded PDU

Returns:

A ByteBuffer that contaons the PDU

Throws:

EncoderException - If anything goes wrong.

hasValue

public boolean hasValue()

Tells if the Control has a value or not

Specified by:

hasValue in interface Control

Returns:

true if th Control has a value, even containing no bytes.

getDecoder

public ControlDecoder getDecoder()

Description copied from interface: CodecControl

Get the associated decoder

Specified by:

getDecoder in interface CodecControl

Returns:

The Control decoder

toString

public String toString()

Return a String representing a Control

Overrides:

toString in class Object