Package com.massifmaps.datasources

Class AssetTileDataSource

java.lang.Object

com.massifmaps.datasources.TileDataSource

com.massifmaps.datasources.AssetTileDataSource

public class AssetTileDataSource
extends TileDataSource

A tile data source where each map tile is a seperate image file bundled with the application.
The requests are generated using a template scheme, where tags in the basePath string are replaced with actual values.
The following tags are supported: zoom, x, y, xflipped, yflipped, quadkey.

For example, if basePath = "t{zoom}_{x}_{y}.png" and the requested tile has zoom == 2,
x == 1 and y == 3, then the tile will be loaded from the following path: "t2_1_2.png".

Constructor Summary

Constructors

Constructor	Description
AssetTileDataSource(int minZoom, int maxZoom, String basePath)	Constructs an AssetTileDataSource object.

Method Summary

Modifier and Type	Method	Description
protected String	buildAssetPath(String basePath, MapTile tile)
TileData	loadTile(MapTile tile)	Loads the specified tile. Note: the tile coordinate system used here is vertically flipped relative to layer tile coordinate system.

Methods inherited from class com.massifmaps.datasources.TileDataSource

buildTagValues, containsMetaDataKey, getContainerMetaData, getDataExtent, getMaxOverzoomLevel, getMaxZoom, getMaxZoomWithOverzoom, getMetaData, getMetaDataElement, getMinZoom, getProjection, isMaxOverzoomLevelSet, notifyTilesChanged, setMaxOverzoomLevel, setMetaData, setMetaDataElement

Methods inherited from class java.lang.Object

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

Constructor Details

AssetTileDataSource

public AssetTileDataSource(int minZoom,
 int maxZoom,
 String basePath)

Constructs an AssetTileDataSource object.

Parameters:

minZoom - The minimum zoom level supported by this data source.

maxZoom - The maximum zoom level supported by this data source.

basePath - The base path containing tags (for example, "t{zoom}_{x}_{y}.png").

Method Details

loadTile

public TileData loadTile(MapTile tile)

Description copied from class: TileDataSource

Loads the specified tile.
Note: the tile coordinate system used here is vertically flipped relative to layer tile coordinate system.

Overrides:

loadTile in class TileDataSource

Parameters:

tile - The tile to load.

Returns:

The tile data. If the tile is not available, null may be returned.

buildAssetPath

protected String buildAssetPath(String basePath,
 MapTile tile)