org.deegree_impl.graphics.displayelements
Class DisplayElementFactory

java.lang.Object
  org.deegree_impl.graphics.displayelements.DisplayElementFactory

public class DisplayElementFactory

extends java.lang.Object

Factory class for the different kinds of DisplayElements.

Version:

$Revision: 1.23 $ $Date: 2004/03/05 07:42:14 $

Author:

Andreas Poth, Markus Schneider

Constructor Summary

DisplayElementFactory()

Method Summary

static DisplayElement	buildDisplayElement(java.lang.Object o) Builds a DisplayElement using the given Feature or Raster and a default Symbolizer.
static DisplayElement	buildDisplayElement(java.lang.Object o, Symbolizer symbolizer) Builds a DisplayElement using the given Feature or raster and Symbolizer.
static LabelDisplayElement	buildLabelDisplayElement(Feature feature, GM_Object gmObject, TextSymbolizer sym) Creates a LabelDisplayElement using the given geometry and style information.
static LineStringDisplayElement	buildLineStringDisplayElement(Feature feature, GM_Object geom, LineSymbolizer sym) Creates a LineStringDisplayElement using the given geometry and style information.
static PointDisplayElement	buildPointDisplayElement(Feature feature, GM_Object geom, PointSymbolizer sym) Creates a PointDisplayElement using the given geometry and style information.
static PolygonDisplayElement	buildPolygonDisplayElement(Feature feature, GM_Object gmObject, PolygonSymbolizer sym) Creates a PolygonDisplayElement using the given geometry and style information.
static RasterDisplayElement	buildRasterDisplayElement(GC_GridCoverage gc, RasterSymbolizer sym) Creates a RasterDisplayElement from the submitted image.
DisplayElement[]	createDisplayElement(java.lang.Object o, UserStyle[] styles) returns the display elements associated to a feature

Methods inherited from class java.lang.Object

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

Constructor Detail

DisplayElementFactory

public DisplayElementFactory()

Method Detail

createDisplayElement

public DisplayElement[] createDisplayElement(java.lang.Object o,
                                             UserStyle[] styles)
                                      throws IncompatibleGeometryTypeException

returns the display elements associated to a feature

Throws:

IncompatibleGeometryTypeException

buildDisplayElement

public static DisplayElement buildDisplayElement(java.lang.Object o,
                                                 Symbolizer symbolizer)
                                          throws IncompatibleGeometryTypeException

Builds a DisplayElement using the given Feature or raster and Symbolizer.

Parameters:

o - contains the geometry or raster information (Feature or raster)

symbolizer - contains the drawing (style) information and selects the geometry property of the Feature to be drawn

Returns:

constructed DisplayElement

Throws:

IncompatibleGeometryTypeException - if the selected geometry of the Feature is not compatible with the Symbolizer

buildDisplayElement

public static DisplayElement buildDisplayElement(java.lang.Object o)
                                          throws IncompatibleGeometryTypeException

Builds a DisplayElement using the given Feature or Raster and a default Symbolizer.

Parameters:

o - contains the geometry or raster information (Feature or raster)

Returns:

constructed DisplayElement

Throws:

IncompatibleGeometryTypeException - if the selected geometry of the Feature is not compatible with the Symbolizer

buildPointDisplayElement

public static PointDisplayElement buildPointDisplayElement(Feature feature,
                                                           GM_Object geom,
                                                           PointSymbolizer sym)

Creates a PointDisplayElement using the given geometry and style information.

Parameters:

feature - associated Feature

geom - geometry information

sym - style information

Returns:

constructed PointDisplayElement

buildLineStringDisplayElement

public static LineStringDisplayElement buildLineStringDisplayElement(Feature feature,
                                                                     GM_Object geom,
                                                                     LineSymbolizer sym)
                                                              throws IncompatibleGeometryTypeException

Creates a LineStringDisplayElement using the given geometry and style information.

Parameters:

feature - associated Feature

geom - geometry information

sym - style information

Returns:

constructed LineStringDisplayElement

Throws:

IncompatibleGeometryTypeException - if the geometry property is not a GM_Curve or a GM_MultiCurve

buildPolygonDisplayElement

public static PolygonDisplayElement buildPolygonDisplayElement(Feature feature,
                                                               GM_Object gmObject,
                                                               PolygonSymbolizer sym)
                                                        throws IncompatibleGeometryTypeException

Creates a PolygonDisplayElement using the given geometry and style information.

Parameters:

feature - associated Feature

gmObject - geometry information

sym - style information

Returns:

constructed PolygonDisplayElement

Throws:

IncompatibleGeometryTypeException - if the geometry property is not a GM_Surface or a GM_MultiSurface

buildLabelDisplayElement

public static LabelDisplayElement buildLabelDisplayElement(Feature feature,
                                                           GM_Object gmObject,
                                                           TextSymbolizer sym)
                                                    throws IncompatibleGeometryTypeException

Creates a LabelDisplayElement using the given geometry and style information.

Parameters:

feature - Feature to be used (necessary for evaluation of the label expression)

gmObject - geometry information

sym - style information

Returns:

constructed PolygonDisplayElement

Throws:

IncompatibleGeometryTypeException - if the geometry property is not a GM_Point, a GM_Surface or GM_MultiSurface

buildRasterDisplayElement

public static RasterDisplayElement buildRasterDisplayElement(GC_GridCoverage gc,
                                                             RasterSymbolizer sym)

Creates a RasterDisplayElement from the submitted image. The submitted GM_Envelope holds the bounding box of the imgae/raster data.

Parameters:

gc - grid coverage

sym - raster symbolizer

Returns:

RasterDisplayElement