org.apache.directory.server.core.partition.impl.btree.jdbm

Class ServerEntrySerializer

java.lang.Object

org.apache.directory.server.core.partition.impl.btree.jdbm.ServerEntrySerializer

All Implemented Interfaces:

Serializable, Serializer

public class ServerEntrySerializer
extends Object
implements Serializer

Version:

$Rev$, $Date$

Author:

Apache Directory Project

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ServerEntrySerializer(org.apache.directory.shared.ldap.schema.SchemaManager schemaManager) Creates a new instance of ServerEntrySerializer.

Method Summary

Methods

Modifier and Type	Method and Description
Object	deserialize(byte[] bytes) Deserialize a ServerEntry.
byte[]	serialize(Object object) This is the place where we serialize entries, and all theirs elements.

Methods inherited from class java.lang.Object

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

Constructor Detail

ServerEntrySerializer

public ServerEntrySerializer(org.apache.directory.shared.ldap.schema.SchemaManager schemaManager)

Creates a new instance of ServerEntrySerializer.

Parameters:

schemaManager - The reference to the global schemaManager

Method Detail

serialize

public byte[] serialize(Object object)
                 throws IOException

This is the place where we serialize entries, and all theirs elements. the reason why we don't call the underlying methods (ServerAttribute.write(), Value.write()) is that we need access to the registries to read back the values.

The structure used to store the entry is the following :

[DN length] : can be -1 if we don't have a DN, 0 if the DN is empty, otherwise contains the DN's length.

NOTE :This should be unnecessary, as the DN should always exists

DN : The entry's DN. Can be empty (rootDSE)

[nb attributes] The number of attributes
For each attribute : [upId] The attribute user provided ID (it can't be null) [nb values] The number of values
For each value : [is valid] if the value is valid [HR flag] if the value is a String [Streamed flag] if the value is streamed [UP value] the user provided value [Norm value] (will be null if normValue == upValue)

Specified by:

serialize in interface Serializer

Parameters:

object - Object to serialize

Returns:

a byte array representing the object's state

Throws:

IOException

deserialize

public Object deserialize(byte[] bytes)
                   throws IOException

Deserialize a ServerEntry.

Specified by:

deserialize in interface Serializer

Parameters:

bytes - the byte array containing the serialized entry

Returns:

An instance of a ServerEntry object

Throws:

IOException - if we can't deserialize the ServerEntry