org.geotools.index.rtree.cachefs
Class FileSystemNode

java.lang.Object
  org.geotools.index.rtree.Node
      org.geotools.index.rtree.cachefs.FileSystemNode

All Implemented Interfaces:

EntryBoundsChangeListener

public class FileSystemNode

extends Node

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Author:

Tommaso Nolli

Field Summary

Fields inherited from class org.geotools.index.rtree.Node

bounds, entries, entriesCount, isChanged, maxNodeEntries

Constructor Summary

FileSystemNode(Parameters params)
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FileSystemNode(Parameters params, long offset)
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Method Summary

protected void	doSave() Saves this Node; called from save()
boolean	equals(java.lang.Object obj)
protected void	finalize() Force this node flush
void	flush() Flushes this node to disk Node page structure: 1 * byte --> 1 = leaf, 2 = non leaf 1 * long --> parent offset entries len * 40 --> the entries each entry is as follow 4 * double --> the bounding box (x1, x2, y1, y2) 1 * long --> the pointer (-1 if leaf) Data pages are immediatly after leaf Node pages.
protected Entry	getEntry(Node node) Returns the Entry pointing the specified Node
Node	getParent() DOCUMENT ME!
void	setParent(Node node) Sets the parent of this Node

Methods inherited from class org.geotools.index.rtree.Node

addEntry, boundsChanged, clear, getBounds, getEntries, getEntriesCount, getEntry, isLeaf, removeEntry, save, setLeaf

Methods inherited from class java.lang.Object

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

Constructor Detail

FileSystemNode

public FileSystemNode(Parameters params)

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Parameters:

params -

FileSystemNode

public FileSystemNode(Parameters params,
                      long offset)
               throws java.io.IOException,
                      TreeException

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Parameters:

params -

offset - DOCUMENT ME!

Throws:

java.io.IOException - DOCUMENT ME!

TreeException - DOCUMENT ME!

Method Detail

getParent

public Node getParent()
               throws TreeException

Description copied from class: Node

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Specified by:

getParent in class Node

Returns:

Throws:

TreeException - DOCUMENT ME!

See Also:

org.geotools.rtree.Node#getParent()

flush

public void flush()
           throws TreeException

Flushes this node to disk

 Node page structure:
 1 * byte         --> 1 = leaf, 2 = non leaf
 1 * long         --> parent offset
 entries len * 40 --> the entries
 
 each entry is as follow
 4 * double --> the bounding box (x1, x2, y1, y2)
 1 * long   --> the pointer (-1 if leaf)
 
 Data pages are immediatly after leaf Node pages.
 
 

Throws:

TreeException - DOCUMENT ME!

doSave

protected void doSave()
               throws TreeException

Description copied from class: Node

Saves this Node; called from save()

Specified by:

doSave in class Node

Throws:

TreeException

See Also:

org.geotools.rtree.Node#save()

finalize

protected void finalize()
                 throws java.lang.Throwable

Force this node flush

Throws:

java.lang.Throwable - DOCUMENT ME!

getEntry

protected Entry getEntry(Node node)

Description copied from class: Node

Returns the Entry pointing the specified Node

Specified by:

getEntry in class Node

Parameters:

node - The Node

Returns:

The Entry

See Also:

org.geotools.rtree.Node#getEntry(org.geotools.rtree.Node)

setParent

public void setParent(Node node)

Description copied from class: Node

Sets the parent of this Node

Specified by:

setParent in class Node

Parameters:

node - The parent Node

See Also:

org.geotools.rtree.Node#setParent(org.geotools.rtree.Node)

equals

public boolean equals(java.lang.Object obj)

See Also:

Object.equals(java.lang.Object)