Package org.geotools.tpk

Class TPKZoomLevelV2

Object

TPKZoomLevelV2

All Implemented Interfaces:

TPKZoomLevel

public class TPKZoomLevelV2
extends Object
implements TPKZoomLevel

TPKZoomLevel interface implementation for ESRI Compact Cache V2 files

TPK is a ZIP archive

In V2 the bundle index is a incorporated into the same file as the bundle data. The index entries are each 8-bytes long and have both the tile data length and tile data offset.

Also note that the index is stored in row-major order INSTEAD of column-major order!

Constructor Summary

Constructors

Constructor	Description
TPKZoomLevelV2(ZipFile theTPK, Map<String,ZipEntry> zipEntryMap, List<String> bundleNames, long zoomLevel)

Method Summary

Modifier and Type	Method	Description
long	getMaxColumn()
long	getMaxRow()
long	getMinColumn()
long	getMinRow()
List<TPKTile>	getTiles(long top, long bottom, long left, long right, String format)	Read the tile data for the given coverage and return a list of tile objects to the caller.
long	getZoomLevel()
void	releaseResources()	When done with TPK file call this method for each Zoom Level to free up held resources and remove object references that would prevent garbage collection
void	setTPKandEntryMap(ZipFile theTPK, Map<String,ZipEntry> zipEntryMap)	On subsequent uses of a TPK file we must use this method to set current references!!

Methods inherited from class Object

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

Constructor Detail

TPKZoomLevelV2

public TPKZoomLevelV2(ZipFile theTPK,
                      Map<String,ZipEntry> zipEntryMap,
                      List<String> bundleNames,
                      long zoomLevel)

Method Detail

setTPKandEntryMap

public void setTPKandEntryMap(ZipFile theTPK,
                              Map<String,ZipEntry> zipEntryMap)

On subsequent uses of a TPK file we must use this method to set current references!!

Specified by:

setTPKandEntryMap in interface TPKZoomLevel

Parameters:

theTPK - -- reference to the TPK ZipFile object

zipEntryMap - -- reference to the ZipEntry mapping object

getTiles

public List<TPKTile> getTiles(long top,
                              long bottom,
                              long left,
                              long right,
                              String format)

Read the tile data for the given coverage and return a list of tile objects to the caller. Note the read order we used is optimized for this version of the content cache (ie we try to always read forward as much as possible!!)

Specified by:

getTiles in interface TPKZoomLevel

Parameters:

top - -- topmost row of coverage

bottom - -- bottommost row of coverage

left - -- leftmost column of coverage

right - -- rightmost column of coverage

format - -- format of tile data (PNG, JPEG)

Returns:

-- list of TPKTile objects

releaseResources

public void releaseResources()

When done with TPK file call this method for each Zoom Level to free up held resources and remove object references that would prevent garbage collection

Specified by:

releaseResources in interface TPKZoomLevel

getZoomLevel

public long getZoomLevel()

Specified by:

getZoomLevel in interface TPKZoomLevel

getMinRow

public long getMinRow()

Specified by:

getMinRow in interface TPKZoomLevel

getMaxRow

public long getMaxRow()

Specified by:

getMaxRow in interface TPKZoomLevel

getMinColumn

public long getMinColumn()

Specified by:

getMinColumn in interface TPKZoomLevel

getMaxColumn

public long getMaxColumn()

Specified by:

getMaxColumn in interface TPKZoomLevel