com.geoway.mobile.datasources

类 MBTilesTileDataSource

java.lang.Object

com.geoway.mobile.datasources.TileDataSource

com.geoway.mobile.datasources.MBTilesTileDataSource

public class MBTilesTileDataSource
extends TileDataSource

A tile data source that loads tiles from a local Sqlite database.
The database must contain table "tiles" with the following fields:
"zoom_level" (tile zoom level), "tile_column" (tile x coordinate),
"tile_row" (tile y coordinate), "tile_data" (compressed tile image).

字段概要

从类继承的字段 com.geoway.mobile.datasources.TileDataSource

swigCMemOwn

构造器概要

构造器

构造器和说明
MBTilesTileDataSource(int minZoom, int maxZoom, java.lang.String path) Constructs a MBTilesTileDataSource object.
MBTilesTileDataSource(int minZoom, int maxZoom, java.lang.String path, MBTilesScheme scheme) Constructs a MBTilesTileDataSource object with specified tile scheme.
MBTilesTileDataSource(long cPtr, boolean cMemoryOwn)
MBTilesTileDataSource(java.lang.String path) Constructs a MBTilesTileDataSource object.

方法概要

限定符和类型	方法和说明
void	delete()
protected void	finalize()
static long	getCPtr(MBTilesTileDataSource obj)
MapBounds	getDataExtent() Returns the extent of this data source.
StringMap	getMetaData() Get data source metadata information.
TileData	loadTile(MapTile mapTile) Loads the specified tile.
static MBTilesTileDataSource	swigCreatePolymorphicInstance(long cPtr, boolean cMemoryOwn) Creates a polymorphic instance of the given native object.
protected void	swigDirectorDisconnect()
java.lang.String	swigGetClassName() Returns the actual class name of this object.
java.lang.Object	swigGetDirectorObject() Returns the connected director object.
void	swigReleaseOwnership()
void	swigTakeOwnership()

从类继承的方法 com.geoway.mobile.datasources.TileDataSource

getCPtr, getDataBounds, getMaxZoom, getMinZoom, getProjection, getTileSize, isIntervalLevel, notifyTilesChanged, setDataBounds, setIntervalLevel, setTileSize

从类继承的方法 java.lang.Object

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

构造器详细资料

MBTilesTileDataSource

public MBTilesTileDataSource(long cPtr,
                             boolean cMemoryOwn)

MBTilesTileDataSource

public MBTilesTileDataSource(java.lang.String path)
                      throws java.io.IOException

Constructs a MBTilesTileDataSource object. TMS tile scheme is used,
Min and max zoom levels are automatically detected.

参数:

path - The path to the local Sqlite database file.

抛出:

java.lang.Exception - If the the file could not be opened.

java.io.IOException

MBTilesTileDataSource

public MBTilesTileDataSource(int minZoom,
                             int maxZoom,
                             java.lang.String path)
                      throws java.io.IOException

Constructs a MBTilesTileDataSource object. TMS tile scheme is used.

参数:

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

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

path - The path to the local Sqlite database file.

抛出:

java.lang.Exception - If the the file could not be opened.

java.io.IOException

MBTilesTileDataSource

public MBTilesTileDataSource(int minZoom,
                             int maxZoom,
                             java.lang.String path,
                             MBTilesScheme scheme)
                      throws java.io.IOException

Constructs a MBTilesTileDataSource object with specified tile scheme.

参数:

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

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

path - The path to the local Sqlite database file.

scheme - Tile scheme to use.

抛出:

java.lang.Exception - If the the file could not be opened.

java.io.IOException

方法详细资料

getCPtr

public static long getCPtr(MBTilesTileDataSource obj)

finalize

protected void finalize()

覆盖:

finalize 在类中 TileDataSource

delete

public void delete()

覆盖:

delete 在类中 TileDataSource

swigDirectorDisconnect

protected void swigDirectorDisconnect()

覆盖:

swigDirectorDisconnect 在类中 TileDataSource

swigReleaseOwnership

public void swigReleaseOwnership()

覆盖:

swigReleaseOwnership 在类中 TileDataSource

swigTakeOwnership

public void swigTakeOwnership()

覆盖:

swigTakeOwnership 在类中 TileDataSource

swigCreatePolymorphicInstance

public static MBTilesTileDataSource swigCreatePolymorphicInstance(long cPtr,
                                                                  boolean cMemoryOwn)

Creates a polymorphic instance of the given native object. This is used internally by the SDK.

参数:

cPtr - The native pointer of the instance.

cMemoryOwn - The ownership flag.

返回:

The created instance.

getMetaData

public StringMap getMetaData()

Get data source metadata information.
Possible parameters can be found in MBTiles specification.

返回:

Map containing meta data information (parameter names mapped to parameter values).

getDataExtent

public MapBounds getDataExtent()

Returns the extent of this data source. Extent is the minimal bounding box encompassing all the tiles at maximum zoom level.

返回:

The minimal bounding box for the tiles.

loadTile

public TileData loadTile(MapTile mapTile)

从类复制的说明: TileDataSource

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

覆盖:

loadTile 在类中 TileDataSource

参数:

mapTile - The tile to load.

返回:

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

swigGetClassName

public java.lang.String swigGetClassName()

Returns the actual class name of this object. This is used internally by the SDK.

覆盖:

swigGetClassName 在类中 TileDataSource

返回:

The class name of this object.

swigGetDirectorObject

public java.lang.Object swigGetDirectorObject()

Returns the connected director object. This is used internally by the SDK.

覆盖:

swigGetDirectorObject 在类中 TileDataSource

返回:

The connected director object or null if director is not connected.