org.geotools.gml2.simple

Class GeometryEncoder<T extends Geometry>

Object

ObjectEncoder<T>

GeometryEncoder<T>

Type Parameters:

T -

Direct Known Subclasses:

GenericGeometryEncoder, GenericGeometryEncoder, GeometryCollectionEncoder, RingEncoder

public abstract class GeometryEncoder<T extends Geometry>
extends ObjectEncoder<T>

Base class for all encoders writing a Geometry. Implementations should provide one of the two "encode" methods, encode(Geometry, AttributesImpl, GMLWriter) or encode(Geometry, AttributesImpl, GMLWriter, String), failing to do so will result in a infinite recursion and eventually in a StackOverflowError

Author:

Justin Deoliveira, OpenGeo, Andrea Aime - GeoSolutions

Field Summary

Fields inherited from class ObjectEncoder

encoder

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	GeometryEncoder(Encoder encoder)

Method Summary

Modifier and Type	Method and Description
protected void	addGmlId(AttributesImpl attributes, String gmlId) Adds a gmlId to an existing and non null attribute set
protected AttributesImpl	cloneWithGmlId(AttributesImpl atts, String gmlId) Returns a new AttributesImpl based on the provided on, with the addition of a gml:id attribute
void	encode(T geometry, AttributesImpl atts, GMLWriter handler) Encodes a geometry value
void	encode(T geometry, AttributesImpl atts, GMLWriter handler, String gmlId) Encodes a geometry value with a given gmlId (implementations might choose to use it to generate gml:id attributes, depending on the GML version.

Methods inherited from class Object

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

Constructor Detail

GeometryEncoder

protected GeometryEncoder(Encoder encoder)

Method Detail

encode

public void encode(T geometry,
                   AttributesImpl atts,
                   GMLWriter handler,
                   String gmlId)
            throws Exception

Encodes a geometry value with a given gmlId (implementations might choose to use it to generate gml:id attributes, depending on the GML version. The default implementation does not use gmlId and simply delegates to encode(Geometry, AttributesImpl, GMLWriter)

Parameters:

geometry - The Geometry to be encoded

atts - Its attributes

handler - The handler used to write XML

gmlId - If not null, some implementation will use to as the gml:id (and to build ids for the nested features)

Throws:

Exception

cloneWithGmlId

protected AttributesImpl cloneWithGmlId(AttributesImpl atts,
                                        String gmlId)

Returns a new AttributesImpl based on the provided on, with the addition of a gml:id attribute

Parameters:

atts - The base attributes (can be null)

gmlId - The desired gml:id value

Returns:

The provided atts object if gmlId is null, a clone of the provided one plus the gml:id attribute otherwise

addGmlId

protected void addGmlId(AttributesImpl attributes,
                        String gmlId)

Adds a gmlId to an existing and non null attribute set

encode

public void encode(T geometry,
                   AttributesImpl atts,
                   GMLWriter handler)
            throws Exception

Encodes a geometry value

Specified by:

encode in class ObjectEncoder<T extends Geometry>

Parameters:

geometry - The Geometry to be encoded

atts - Its attributes

handler - The handler used to write XML

Throws:

Exception