org.deegree.model.feature
Class GMLFeatureDocument

java.lang.Object
  org.deegree.framework.xml.XMLFragment
      org.deegree.ogcbase.GMLDocument
          org.deegree.model.feature.GMLFeatureDocument

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

GMLFeatureCollectionDocument

public class GMLFeatureDocument
extends GMLDocument

Parser and wrapper class for GML feature documents.

Validation
Has validation capabilities: if the schema is provided or the document contains a reference to a schema the structure of the generated features is checked. If no schema information is available, feature + property types are heuristically determined from the feature instance in the document (guessing of simple property types can be turned off, because it may cause unwanted effects).

XLinks
Has some basic understanding of XLink: Supports internal XLinks (i.e. the content for a feature is given by a reference to a feature element in the same document). No support for external XLinks yet.

Propagation of srsName attribute

Version:

$Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $

Author:

Markus Schneider , last edited by: $Author: mschneider $

See Also:

Serialized Form

Field Summary

protected Map<String,Feature>	featureMap
protected Map<URI,GMLSchema>	gmlSchemaMap
protected Collection<XLinkedFeatureProperty>	xlinkPropertyList

Fields inherited from class org.deegree.framework.xml.XMLFragment

DEFAULT_URL, nsContext, XLNNS

Constructor Summary

GMLFeatureDocument()
Creates a new instance of GMLFeatureDocument.

GMLFeatureDocument(boolean guessSimpleTypes)
Creates a new instance of GMLFeatureDocument.

Method Summary

protected FeatureType	getFeatureType(QualifiedName ftName) Returns the feature type with the given name.
protected Map<URI,GMLSchema>	getGMLSchemas() Determines and retrieves the GML schemas that the document refers to.
protected GMLSchema	getSchemaForNamespace(URI ns) Returns the GML schema for the given namespace.
Feature	parseFeature() Returns the object representation for the root feature element.
protected Feature	parseFeature(Element element) Returns the object representation for the given feature element.
protected Feature	parseFeature(Element element, String srsName) Returns the object representation for the given feature element.
Feature	parseFeature(String defaultSRS) Returns the object representation for the root feature element.
protected String	parseFeatureId(Element featureElement) Parses the feature id attribute from the given feature element.
FeatureProperty	parseProperty(Element propertyElement, FeatureType ft) Returns the object representation for the given property element.
FeatureProperty	parseProperty(Element propertyElement, FeatureType ft, String srsName) Returns the object representation for the given property element.
protected void	resolveXLinkReferences()
void	setSchemas(Map<URI,GMLSchema> gmlSchemaMap) Explicitly sets the GML schema information that the document must comply to.

Methods inherited from class org.deegree.ogcbase.GMLDocument

parseEnvelope, parseGrid, parsePos, parseTimePosition

Methods inherited from class org.deegree.framework.xml.XMLFragment

getAsPrettyString, getAsString, getAttachedSchemas, getQualifiedName, getRootElement, getSystemId, hasSchema, load, load, load, parseQualifiedName, parseSimpleLink, prettyPrint, prettyPrint, resolve, setRootElement, setSystemId, setSystemId, toString, write, write, write, write

Methods inherited from class java.lang.Object

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

Field Detail

gmlSchemaMap

protected Map<URI,GMLSchema> gmlSchemaMap

featureMap

protected Map<String,Feature> featureMap

xlinkPropertyList

protected Collection<XLinkedFeatureProperty> xlinkPropertyList

Constructor Detail

GMLFeatureDocument

public GMLFeatureDocument()

Creates a new instance of GMLFeatureDocument.

Simple types encountered during parsing are "guessed", i.e. the parser tries to convert the values to double, integer, calendar, etc. However, this may lead to unwanted results, e.g. a property value of "054604" is converted to "54604".

GMLFeatureDocument

public GMLFeatureDocument(boolean guessSimpleTypes)

Creates a new instance of GMLFeatureDocument.

Parameters:

guessSimpleTypes - set to true, if simple types should be "guessed" during parsing

Method Detail

setSchemas

public void setSchemas(Map<URI,GMLSchema> gmlSchemaMap)

Explicitly sets the GML schema information that the document must comply to.

This overrides any schema information that the document refers to.

Parameters:

gmlSchemaMap - key: namespace URI, value: GMLSchema

parseFeature

public Feature parseFeature()
                     throws XMLParsingException,
                            UnknownCRSException

Returns the object representation for the root feature element.

Returns:

object representation for the root feature element.

Throws:

XMLParsingException

UnknownCRSException

parseFeature

public Feature parseFeature(String defaultSRS)
                     throws XMLParsingException,
                            UnknownCRSException

Returns the object representation for the root feature element.

Parameters:

defaultSRS - default SRS for all a descendant geometry properties

Returns:

object representation for the root feature element.

Throws:

XMLParsingException

UnknownCRSException

parseFeature

protected Feature parseFeature(Element element)
                        throws XMLParsingException,
                               UnknownCRSException

Returns the object representation for the given feature element.

Parameters:

element - feature element

Returns:

object representation for the given feature element.

Throws:

XMLParsingException

UnknownCRSException

parseFeature

protected Feature parseFeature(Element element,
                               String srsName)
                        throws XMLParsingException,
                               UnknownCRSException

Returns the object representation for the given feature element.

Parameters:

element - feature element

srsName - default SRS for all descendant geometry properties

Returns:

object representation for the given feature element

Throws:

XMLParsingException

UnknownCRSException

parseProperty

public FeatureProperty parseProperty(Element propertyElement,
                                     FeatureType ft)
                              throws XMLParsingException,
                                     UnknownCRSException

Returns the object representation for the given property element.

Parameters:

propertyElement - property element

ft - feature type of the feature that the property belongs to

Returns:

object representation for the given property element

Throws:

XMLParsingException

UnknownCRSException

parseProperty

public FeatureProperty parseProperty(Element propertyElement,
                                     FeatureType ft,
                                     String srsName)
                              throws XMLParsingException,
                                     UnknownCRSException

Returns the object representation for the given property element.

Parameters:

propertyElement - property element

ft - feature type of the feature that the property belongs to

srsName - default SRS for all a descendant geometry properties

Returns:

object representation for the given property element.

Throws:

XMLParsingException

UnknownCRSException

resolveXLinkReferences

protected void resolveXLinkReferences()
                               throws XMLParsingException

Throws:

XMLParsingException

getGMLSchemas

protected Map<URI,GMLSchema> getGMLSchemas()
                                    throws XMLParsingException,
                                           UnknownCRSException

Determines and retrieves the GML schemas that the document refers to.

Returns:

the GML schemas that are attached to the document, keys are URIs (namespaces), values are GMLSchemas.

Throws:

XMLParsingException

UnknownCRSException

getSchemaForNamespace

protected GMLSchema getSchemaForNamespace(URI ns)
                                   throws XMLParsingException,
                                          UnknownCRSException

Returns the GML schema for the given namespace.

Parameters:

ns -

Returns:

the GML schema for the given namespace if it is declared, null otherwise.

Throws:

XMLParsingException

UnknownCRSException

getFeatureType

protected FeatureType getFeatureType(QualifiedName ftName)
                              throws XMLParsingException,
                                     UnknownCRSException

Returns the feature type with the given name.

If schema information is available and a feature type with the given name is not defined, an XMLParsingException is thrown.

Parameters:

ftName - feature type to look up

Returns:

the feature type with the given name if it is declared, null otherwise.

Throws:

XMLParsingException

UnknownCRSException

parseFeatureId

protected String parseFeatureId(Element featureElement)

Parses the feature id attribute from the given feature element.

Looks after 'gml:id' (GML 3 style) first, if no such attribute is present, the 'fid' (GML 2 style) attribute is used.

Parameters:

featureElement -

Returns:

the feature id, this is "" if neither a 'gml:id' nor a 'fid' attribute is present