de.fhg.igd.gps.maps
Class ExpediaMapRequester

java.lang.Object
  de.fhg.igd.gps.maps.ExpediaMapRequester

All Implemented Interfaces:

MapRequester

public class ExpediaMapRequester

extends Object

implements MapRequester

A MapRequester implementation that can be used to obtain world map clippings from expedia.

Author:

Dennis Bartussek

Field Summary

protected static MemoryCache	imageCache_ cache to store already requested images
protected static double	scaleFactor_ The factor to convert the scale from MapInfo (in meters per pixel) into the ExpediaMap specific scale
protected static double	scaleMax_ largest scale factor that is valid for this ExpediaMapRequester
protected static double	scaleMin_ smallest scale factor that is valid for this ExpediaMapRequester

Constructor Summary

ExpediaMapRequester()
Creates a new Expedia.

Method Summary

BufferedImage	getMap(Latitude latitude, Longitude longitude, double scale, int width, int height) Returns a world map clipping as a BufferedImage object.
BufferedImage	getMap(WGS84Coordinate center, double scale, int width, int height) Returns a world map clipping as a BufferedImage object.
double	scaleMax() Returns the maximum scale that is valid for this MapRequester.
double	scaleMin() Returns the minimum scale that is valid for this MapRequester.

Methods inherited from class java.lang.Object

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

Field Detail

scaleFactor_

protected static final double scaleFactor_

The factor to convert the scale from MapInfo (in meters per pixel) into the ExpediaMap specific scale

See Also:

Constant Field Values

scaleMin_

protected static final double scaleMin_

smallest scale factor that is valid for this ExpediaMapRequester

See Also:

Constant Field Values

scaleMax_

protected static final double scaleMax_

largest scale factor that is valid for this ExpediaMapRequester

See Also:

Constant Field Values

imageCache_

protected static MemoryCache imageCache_

cache to store already requested images

Constructor Detail

ExpediaMapRequester

public ExpediaMapRequester()

Creates a new Expedia.

Method Detail

scaleMin

public double scaleMin()

Description copied from interface: MapRequester

Returns the minimum scale that is valid for this MapRequester.

Specified by:

scaleMin in interface MapRequester

Returns:

the minimum scale for this MapRequester

scaleMax

public double scaleMax()

Description copied from interface: MapRequester

Returns the maximum scale that is valid for this MapRequester.

Specified by:

scaleMax in interface MapRequester

Returns:

the maximum scale for this MapRequester

getMap

public BufferedImage getMap(WGS84Coordinate center,
                            double scale,
                            int width,
                            int height)
                     throws IOException

Description copied from interface: MapRequester

Returns a world map clipping as a BufferedImage object. The center of the requested map is specified by center. The scale argument is expected to be equal to or more than MapRequester.scaleMin() and equal to or less than MapRequester.scaleMax() and will be adjusted to the appropriate level if not within the expected range.

The width and height arguments define the dimension of the returned BufferedImage.

Specified by:

getMap in interface MapRequester

Parameters:

center - the center position of the map

scale - scale of the map, measured in meters per pixel

width - width of the requested BufferedImage, measured in pixels

height - height of the requested BufferedImage, measured in pixels

Returns:

the requested BufferedImage or null if the image could not be retrieved

Throws:

IOException - if an input or output exception occurred during retrieval

getMap

public BufferedImage getMap(Latitude latitude,
                            Longitude longitude,
                            double scale,
                            int width,
                            int height)
                     throws IOException

Description copied from interface: MapRequester

Returns a world map clipping as a BufferedImage object. The center of the requested map is specified by latitude and longitude. The scale argument is expected to be equal to or more than MapRequester.scaleMin() and equal to or less than MapRequester.scaleMax() and will be adjusted to the appropriate level if not within the expected range.

The width and height arguments define the dimension of the returned BufferedImage.

Specified by:

getMap in interface MapRequester

Parameters:

latitude - latitude of the map's center

longitude - longitude of the map's center

scale - scale of the map, measured in meters per pixel

width - width of the requested BufferedImage, measured in pixels

height - height of the requested BufferedImage, measured in pixels

Returns:

the requested BufferedImage or null if the image could not be retrieved

Throws:

IOException - if an input or output exception occurred during retrieval