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

Class EntrySerializer

java.lang.Object

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

All Implemented Interfaces:

Serializable, jdbm.helper.Serializer

public class EntrySerializer
extends Object
implements jdbm.helper.Serializer

Serialize and deserialize a ServerEntry. There is a big difference with the standard Entry serialization : we don't serialize the entry's Dn, we just serialize it's Rdn.

This class must *not* be used outside of the server.

Author:

Apache Directory Project

See Also:

Serialized Form

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
Object	deserialize(byte[] bytes) Deserialize a Entry.
byte[]	serialize(Object object) 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.

Methods inherited from class java.lang.Object

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

Constructor Detail

EntrySerializer

public EntrySerializer(org.apache.directory.api.ldap.model.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 :

• [a byte] : if the Dn is empty 0 will be written else 1
• [Rdn] : The entry's Rdn.
• [numberAttr] : the bumber of attributes. Can be 0
• For each Attribute :
  • [attribute's oid] : The attribute's OID to get back the attributeType on deserialization
  • [Attribute] The attribute

Specified by:

serialize in interface jdbm.helper.Serializer

Throws:

IOException

deserialize

public Object deserialize(byte[] bytes)
                   throws IOException

Deserialize a Entry.

Specified by:

deserialize in interface jdbm.helper.Serializer

Parameters:

bytes - the byte array containing the serialized entry

Returns:

An instance of a Entry object

Throws:

IOException - if we can't deserialize the Entry