iitb.con.indexing.isam
Class LeafNode<T extends java.lang.Comparable<T>>

java.lang.Object
  iitb.con.indexing.isam.LeafNode<T>

All Implemented Interfaces:

ItemSerializer<LeafNode<T>>

public class LeafNode<T extends java.lang.Comparable<T>>
extends java.lang.Object
implements ItemSerializer<LeafNode<T>>

Leaf Node of the index tree. A leaf node consists of the key with respective values (instance ids).

Field Summary

short	dataSize Size of the leaf node
int[]	instanceId Instance ids for the key
T	key key of the index structure

Constructor Summary

LeafNode()

LeafNode(T key)
Intializes with the key

Method Summary

java.lang.Object	attributeDeSerialize(java.nio.ByteBuffer buf, java.lang.Object name) Deserializes the specified attribute to object value
LeafNode<T>	deSerialize(java.nio.ByteBuffer buf) Deserializes the given bytes into leaf node.
java.nio.ByteBuffer	serialize(LeafNode<T> node) Serializes into bytes of the given leaf node.

Methods inherited from class java.lang.Object

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

Field Detail

dataSize

public short dataSize

Size of the leaf node

instanceId

public int[] instanceId

Instance ids for the key

key

public T extends java.lang.Comparable<T> key

key of the index structure

Constructor Detail

LeafNode

public LeafNode()

LeafNode

public LeafNode(T key)

Intializes with the key

Parameters:

key - index key

Method Detail

attributeDeSerialize

public java.lang.Object attributeDeSerialize(java.nio.ByteBuffer buf,
                                             java.lang.Object name)

Deserializes the specified attribute to object value

Specified by:

attributeDeSerialize in interface ItemSerializer<LeafNode<T extends java.lang.Comparable<T>>>

Parameters:

buf - bytes as ByteBuffer

name - attribute name

Returns:

deserialized attribute value as Object

deSerialize

public LeafNode<T> deSerialize(java.nio.ByteBuffer buf)

Deserializes the given bytes into leaf node. Format {[Key] : [No. of values] : [value1, value2, ..., valueN]}

Specified by:

deSerialize in interface ItemSerializer<LeafNode<T extends java.lang.Comparable<T>>>

Parameters:

buf - bytes as ByteBuffer

Returns:

leaf node - LeafNode

serialize

public java.nio.ByteBuffer serialize(LeafNode<T> node)

Serializes into bytes of the given leaf node.

Format {[Key] : [No. of values] : [value1, value2, ..., valueN]}

Specified by:

serialize in interface ItemSerializer<LeafNode<T extends java.lang.Comparable<T>>>

Parameters:

node - leaf node - LeafNode

Returns:

serialized node as ByteBuffer