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

java.lang.Object
  org.apache.directory.server.core.partition.impl.btree.jdbm.AttributeSerializer

All Implemented Interfaces:

java.io.Serializable, jdbm.helper.Serializer

public class AttributeSerializer
extends java.lang.Object
implements jdbm.helper.Serializer

Serializes a attributes object using a custom serialization mechanism so we do not have to rely on Java Serialization which is much more costly.

Version:

$Rev$, $Date$

Author:

Apache Directory Project

See Also:

Serialized Form

Constructor Summary

AttributeSerializer()

Method Summary

java.lang.Object	deserialize(byte[] buf) Deserializes an attribute from the custom serialization structure.
static org.apache.directory.server.core.partition.impl.btree.jdbm.AttributeSerializer.DeserializedAttribute	deserialize(byte[] buf, int offset) Deserializes an attribute from the custom serialization structure.
byte[]	serialize(java.lang.Object obj) Serializes an attribute using the following structure: [id-length][id-bytes][is-binary][length0][value0]...[lengthN][valueN] Here the id-length is the 4 byte int value of the length of bytes for the id string bytes.

Methods inherited from class java.lang.Object

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

Constructor Detail

AttributeSerializer

public AttributeSerializer()

Method Detail

deserialize

public final java.lang.Object deserialize(byte[] buf)
                                   throws java.io.IOException

Deserializes an attribute from the custom serialization structure.

Specified by:

deserialize in interface jdbm.helper.Serializer

Throws:

java.io.IOException

See Also:

Serializer.deserialize(byte[])

deserialize

public static final org.apache.directory.server.core.partition.impl.btree.jdbm.AttributeSerializer.DeserializedAttribute deserialize(byte[] buf,
                                                                                                                                     int offset)
                                                                                                                              throws java.io.IOException

Deserializes an attribute from the custom serialization structure.

Throws:

java.io.IOException

See Also:

Serializer.deserialize(byte[])

serialize

public byte[] serialize(java.lang.Object obj)
                 throws java.io.IOException

Serializes an attribute using the following structure: [id-length][id-bytes][is-binary][length0][value0]...[lengthN][valueN] Here the id-length is the 4 byte int value of the length of bytes for the id string bytes. The id-bytes are the bytes for the id string. The is-binary byte is a true or false for whether or not the values are byte[] or String types. Following this is an array of length-value tuples for the values of the Attributes.

Specified by:

serialize in interface jdbm.helper.Serializer

Throws:

java.io.IOException