org.geotools.map
Class WMSLayer

Object
  Layer
      StyleLayer
          RasterLayer
              GridReaderLayer
                  WMSLayer

public class WMSLayer
extends GridReaderLayer

Wraps a WMS layer into a MapLayer for interactive rendering usage TODO: expose a GetFeatureInfo that returns a feature collection TODO: expose the list of named styles and allow choosing which style to use

Author:

Andrea Aime - OpenGeo

Field Summary

Fields inherited from class GridReaderLayer

params, reader

Fields inherited from class RasterLayer

source

Fields inherited from class StyleLayer

style

Fields inherited from class Layer

listenerList, LOGGER, selected, title, userData, visible

Constructor Summary

WMSLayer(WebMapServer wms, Layer layer)
Builds a new WMS layer

Method Summary

void	addLayer(Layer layer) Allows to add another WMS layer into the GetMap requests
ReferencedEnvelope	getBounds() The bounds of the Layer content (if known).
CoordinateReferenceSystem	getCoordinateReferenceSystem() Returns the CRS used to make requests to the remote WMS
InputStream	getFeatureInfo(DirectPosition2D pos, String infoFormat, int featureCount) Retrieves the feature info as a generic input stream, it's the duty of the caller to interpret the contents and ensure the stream is closed feature info format)
InputStream	getFeatureInfo(ReferencedEnvelope bbox, int width, int height, int x, int y, String infoFormat, int featureCount) Allows to run a standalone GetFeatureInfo request, without the need to have previously run a GetMap request on this layer.
String	getFeatureInfoAsText(DirectPosition2D pos, int featureCount) Retrieves the feature info as text (assuming "text/plain" is a supported feature info format)
GetMapRequest	getLastGetMap() Returns last GetMap request performed by this layer
WMSCoverageReader	getReader() Reader used for efficient access to raster content.
WebMapServer	getWebMapServer() Returns the WebMapServer used by this layer
List<Layer>	getWMSLayers() Returns the WMS Layer used by this layer
boolean	isNativelySupported(CoordinateReferenceSystem crs) Returns true if the specified CRS can be used directly to perform WMS requests.

Methods inherited from class GridReaderLayer

dispose, getParams, toFeatureCollection

Methods inherited from class RasterLayer

getFeatureSource

Methods inherited from class StyleLayer

getStyle, setStyle

Methods inherited from class Layer

addMapLayerListener, connectDataListener, finalize, fireMapLayerListenerLayerChanged, fireMapLayerListenerLayerDeselected, fireMapLayerListenerLayerHidden, fireMapLayerListenerLayerPreDispose, fireMapLayerListenerLayerSelected, fireMapLayerListenerLayerShown, getQuery, getTitle, getUserData, isSelected, isVisible, preDispose, removeMapLayerListener, setSelected, setTitle, setVisible, toString

Methods inherited from class Object

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

Constructor Detail

WMSLayer

public WMSLayer(WebMapServer wms,
                Layer layer)

Builds a new WMS layer

Parameters:

wms -

layer -

Method Detail

getReader

public WMSCoverageReader getReader()

Description copied from class: GridReaderLayer

Reader used for efficient access to raster content.

Overrides:

getReader in class GridReaderLayer

Returns:

getBounds

public ReferencedEnvelope getBounds()

Description copied from class: Layer

The bounds of the Layer content (if known). The bounds can be used to determine if any of the layers content is "on screen" when rendering the map; however often it is expensive to calculate a layers bounds up front so we are allowing this value to be optional.

The returned bounds are a ReferencedEnvelope using the same CoordinateReferenceSystem as the layers contents.

Overrides:

getBounds in class GridReaderLayer

Returns:

layer bounds, null if unknown

getFeatureInfoAsText

public String getFeatureInfoAsText(DirectPosition2D pos,
                                   int featureCount)
                            throws IOException

Retrieves the feature info as text (assuming "text/plain" is a supported feature info format)

Parameters:

pos - the position to be checked, in real world coordinates

Returns:

Throws:

IOException

getFeatureInfo

public InputStream getFeatureInfo(DirectPosition2D pos,
                                  String infoFormat,
                                  int featureCount)
                           throws IOException

Retrieves the feature info as a generic input stream, it's the duty of the caller to interpret the contents and ensure the stream is closed feature info format)

Parameters:

pos - the position to be checked, in real world coordinates

infoFormat - The INFO_FORMAT parameter in the GetFeatureInfo request

Returns:

Throws:

IOException

getFeatureInfo

public InputStream getFeatureInfo(ReferencedEnvelope bbox,
                                  int width,
                                  int height,
                                  int x,
                                  int y,
                                  String infoFormat,
                                  int featureCount)
                           throws IOException

Allows to run a standalone GetFeatureInfo request, without the need to have previously run a GetMap request on this layer. Mostly useful for stateless users that rebuild the map context for each rendering operation (e.g., GeoServer)

Parameters:

pos -

infoFormat - The INFO_FORMAT parameter in the GetFeatureInfo request

Returns:

Throws:

IOException

getWebMapServer

public WebMapServer getWebMapServer()

Returns the WebMapServer used by this layer

Returns:

getWMSLayers

public List<Layer> getWMSLayers()

Returns the WMS Layer used by this layer

Returns:

getCoordinateReferenceSystem

public CoordinateReferenceSystem getCoordinateReferenceSystem()

Returns the CRS used to make requests to the remote WMS

Returns:

getLastGetMap

public GetMapRequest getLastGetMap()

Returns last GetMap request performed by this layer

Returns:

addLayer

public void addLayer(Layer layer)

Allows to add another WMS layer into the GetMap requests

Parameters:

layer -

isNativelySupported

public boolean isNativelySupported(CoordinateReferenceSystem crs)

Returns true if the specified CRS can be used directly to perform WMS requests. Natively supported crs will provide the best rendering quality as no client side reprojection is necessary, the image coming from the WMS server will be used as-is

Parameters:

crs -

Returns: