On 17/11/09 18:58, Pitaev, Anna wrote:
> 2. Please, have a look at our schema Definition for the Geometry:
> <xs:element minOccurs="0" name="Geometry"
> type="ournamespace:LineString_Curve_MultiCurve_CompositeCurvePropertyType"/>
[...]
> Could not find elmeent declaration for:{ourNamespace}Geometry
You cannot use minOccurs in a global element declaration. This invalid
element declaration is probably ignored, hence the error.
http://www.w3.org/TR/xmlschema-0/#Globals
If you want an optional element, define a top-level feature type, and
declare inside it an optional element in the xs:sequence using
minOccurs="0".
> <xs:complexType name="LineString_Curve_MultiCurve_CompositeCurvePropertyType">
> <xs:sequence>
> <xs:choice>
> <xs:element ref="gml:LineString"/>
> <xs:element ref="gml:Curve"/>
> <xs:element ref="gml:MultiCurve"/>
> <xs:element ref="gml:CompositeCurve"/>
> </xs:choice>
> </xs:sequence>
> </xs:complexType>
Even if I remove the minOccurs, this does not work for me. Be aware that
GeoTools Encoder support for user-defined complex types is limited,
unless you are using app-schema (which has its own problems).
I am also not sure of the level of support for curves in JTS or
GeoTools. Hopefully one of the other developers can help. Justin? Jody?
What are you trying to do? Is there a reason you do not use
gml:GeometryPropertyType, which is well-supported? This will allow you
to encode any GML geometry type. For example:
<xs:element name="Geometry" type="gml:GeometryPropertyType" />
[Note that, by convention, elements should be lower case, and the GML
encoding rules specify Type/property/Type/property encoding. I recommend
defining a top-level element that contains a property called "geometry".]
If I have:
SchemaTest.xml:
<?xml version="1.0"?>
<xs:schema targetNamespace="http://www.example.org/example";
xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns:gml="http://www.opengis.net/gml";
xmlns:ex="http://www.example.org/example"; elementFormDefault="qualified"
attributeFormDefault="unqualified">
<xs:import namespace="http://www.opengis.net/gml";
schemaLocation="http://schemas.opengis.net/gml/3.1.1/base/gml.xsd"; />
<xs:element name="Geometry" type="gml:GeometryPropertyType" />
</xs:schema>
Then I can encode a LINESTRING:
String NAMESPACE = "http://www.example.org/example";;
String schemaFileName = "SchemaTest.xml"; // same directory as the code
String wkt = "LINESTRING (60 380, 60 20, 200 400, 280 20, 360 400, 420
20, 500 400, 580 20, 620 400)";
Geometry geometry = (new WKTReader2()).read(wkt);
Configuration configuration = new ApplicationSchemaConfiguration(NAMESPACE,
SchemaTest.class.getResource(schemaFileName).toExternalForm());
org.geotools.xml.Encoder encoder = new
org.geotools.xml.Encoder(configuration);
encoder.encode(geometry, new QName(NAMESPACE, "Geometry"), System.out);
This works in GeoTools (trunk = 2.7-SNAPSHOT). I get:
<?xml version="1.0" encoding="UTF-8"?>
<ex:Geometry xmlns:ex="http://www.example.org/example";
xmlns:gml="http://www.opengis.net/gml";>
<gml:LineString>
<gml:posList>60.0 380.0 60.0 20.0 200.0 400.0 280.0 20.0 360.0 400.0
420.0 20.0 500.0 400.0 580.0 20.0 620.0 400.0</gml:posList>
</gml:LineString>
</ex:Geometry>
Kind regards,
--
Ben Caradoc-Davies <ben.caradoc-dav...@csiro.au>
Software Engineer, CSIRO Earth Science and Resource Engineering
Australian Resources Research Centre
26 Dick Perry Ave, Kensington WA 6151, Australia
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