org.deegree.graphics
Class FeatureLayer

java.lang.Object
  org.deegree.graphics.AbstractLayer
      org.deegree.graphics.FeatureLayer

All Implemented Interfaces:

Layer

Direct Known Subclasses:

LazyFeatureLayer

public class FeatureLayer
extends AbstractLayer

A Layer is a collection of Features building a thematic 'unit' waterways or country borders for example. Features can be added or removed from the layer. A Feature can e changed by a modul of the application using the layer because only references to Features are stored within a layer.

Version:

$Revision: 19454 $ $Date: 2009-09-01 14:27:33 +0200 (Tue, 01 Sep 2009) $

Author:

Andreas Poth

Field Summary

protected FeatureCollection

fc

Fields inherited from class org.deegree.graphics.AbstractLayer

boundingbox, cs, eventController

Constructor Summary

protected	FeatureLayer(String name) creates a layer with EPSG:4326 as default coordinate system
protected	FeatureLayer(String name, CoordinateSystem crs) Creates a new FeatureLayer object.
protected	FeatureLayer(String name, CoordinateSystem crs, FeatureCollection fc) Creates a new AbstractLayer object.

Method Summary

void	addFeature(Feature feature) adds a feature to the layer
void	addFeatureCollection(FeatureCollection featureCollection) adds a feature collection to the layer
Feature[]	getAllFeatures() returns all features
Feature	getFeature(int index) returns the feature that matches the submitted index
Feature	getFeatureById(String id) returns the feature that matches the submitted id
Feature[]	getFeaturesById(String[] ids) returns the feature that matches the submitted id
int	getSize() returns the amount of features within the layer.
void	removeFeature(Feature feature) removes a display Element from the layer
void	removeFeature(int id) removes the display Element from the layer that matches the submitted id
void	setCoordinatesSystem(CoordinateSystem crs) sets the coordinate reference system of the MapView.

Methods inherited from class org.deegree.graphics.AbstractLayer

addEventController, getBoundingBox, getCoordinatesSystem, getName, isValid, removeEventController

Methods inherited from class java.lang.Object

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

Field Detail

fc

protected FeatureCollection fc

Constructor Detail

FeatureLayer

protected FeatureLayer(String name)
                throws Exception

creates a layer with EPSG:4326 as default coordinate system

Parameters:

name - of the feature

Throws:

Exception

FeatureLayer

protected FeatureLayer(String name,
                       CoordinateSystem crs)
                throws Exception

Creates a new FeatureLayer object.

Parameters:

name -

crs -

Throws:

Exception

FeatureLayer

protected FeatureLayer(String name,
                       CoordinateSystem crs,
                       FeatureCollection fc)
                throws Exception

Creates a new AbstractLayer object.

Parameters:

name -

crs -

fc -

Throws:

Exception

Method Detail

getFeatureById

public Feature getFeatureById(String id)

returns the feature that matches the submitted id

Parameters:

id -

Returns:

feature identified by its id

getFeaturesById

public Feature[] getFeaturesById(String[] ids)

returns the feature that matches the submitted id

Parameters:

ids -

Returns:

features identified by their id

getFeature

public Feature getFeature(int index)

returns the feature that matches the submitted index

Parameters:

index -

Returns:

a feature

getAllFeatures

public Feature[] getAllFeatures()

returns all features

Returns:

all features as array

addFeature

public void addFeature(Feature feature)
                throws Exception

adds a feature to the layer

Parameters:

feature -

Throws:

Exception

addFeatureCollection

public void addFeatureCollection(FeatureCollection featureCollection)
                          throws Exception

adds a feature collection to the layer

Parameters:

featureCollection -

Throws:

Exception

removeFeature

public void removeFeature(Feature feature)
                   throws Exception

removes a display Element from the layer

Parameters:

feature -

Throws:

Exception

removeFeature

public void removeFeature(int id)
                   throws Exception

removes the display Element from the layer that matches the submitted id

Parameters:

id -

Throws:

Exception

getSize

public int getSize()

returns the amount of features within the layer.

Returns:

number of contained features

setCoordinatesSystem

public void setCoordinatesSystem(CoordinateSystem crs)
                          throws Exception

sets the coordinate reference system of the MapView. If a new crs is set all geometries of GeometryFeatures will be transformed to the new coordinate reference system.

Parameters:

crs -

Throws:

Exception