org.helidb.util.bplus
Class FixedSizeNodeSizeStrategy

java.lang.Object
  org.helidb.util.bplus.FixedSizeNodeSizeStrategy

All Implemented Interfaces:

NodeSizeStrategy

public class FixedSizeNodeSizeStrategy
extends Object
implements NodeSizeStrategy

This node size strategy gives a fixed node size.

Since:

1.0

Author:

Karl Gustafsson

In_jar:

helidb-core

Constructor Summary

FixedSizeNodeSizeStrategy(int nodeSize)
Constructor.

Method Summary

int	getMaxNumberOfRecordsPerNode(int headerSize, int recordSize, long pos) Given the supplied size of the node header and records, how many records will fit in a node?
int	getNodeSize(int headerSize, int valueSize, long pos) Given the supplied size of the node header and records, how many bytes will a node occupy?

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedSizeNodeSizeStrategy

public FixedSizeNodeSizeStrategy(int nodeSize)

Constructor.

Parameters:

nodeSize - The node size, in bytes.

Method Detail

getNodeSize

public int getNodeSize(int headerSize,
                       int valueSize,
                       long pos)

Description copied from interface: NodeSizeStrategy

Given the supplied size of the node header and records, how many bytes will a node occupy?

Specified by:

getNodeSize in interface NodeSizeStrategy

Parameters:

headerSize - The size of the node header.

valueSize - The size of a record.

pos - The position of the node in the file.

Returns:

The size of a node, in bytes.

getMaxNumberOfRecordsPerNode

public int getMaxNumberOfRecordsPerNode(int headerSize,
                                        int recordSize,
                                        long pos)

Description copied from interface: NodeSizeStrategy

Given the supplied size of the node header and records, how many records will fit in a node?

Specified by:

getMaxNumberOfRecordsPerNode in interface NodeSizeStrategy

Parameters:

headerSize - The size of the node header.

recordSize - The size of a record.

pos - The position of the node in the file.

Returns:

The number of records that fit in a node.