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Read GML2 for wfs layers as it is also supported for geoserver

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git-svn-id: http://svn.osgeo.org/qgis/trunk@5881 c8812cc2-4d05-0410-92ff-de0c093fc19c
This commit is contained in:
mhugent 2006-09-29 07:26:23 +00:00
parent a1f37426f4
commit c61c944418
2 changed files with 848 additions and 141 deletions
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935
src/providers/wfs/qgswfsprovider.cpp
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54
src/providers/wfs/qgswfsprovider.h
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@ -100,6 +100,9 @@ class QgsWFSProvider: public QgsVectorDataProvider
/**Stores the minimum/maximum values for each attribute
The position in the vector is equal to the position of an attribute in the layers attribute vector*/
std::vector< std::pair<QString, QString> > mMinMaxCash;
/**Goes through all the features and their attributes and populates mMinMaxCash with entries*/
void fillMinMaxCash();
/**Collects information about the field types. Is called internally from QgsWFSProvider::getFeature*/
int describeFeatureType(const QString& uri, std::vector<QgsField>& fields);
@ -116,26 +119,55 @@ class QgsWFSProvider: public QgsVectorDataProvider
int describeFeatureTypeGET(const QString& uri, std::vector<QgsField>& fields);
int describeFeatureTypePOST(const QString& uri, std::vector<QgsField>& fields);
int describeFeatureTypeSOAP(const QString& uri, std::vector<QgsField>& fields);
//GML2 specific methods
int getExtentFromGML2(QgsRect* extent, const QDomElement& wfsCollectionElement) const;
int getFeaturesFromGML2(const QDomElement& wfsCollectionElement, const QString& geometryAttribute, std::vector<QgsFeature*>& features) const;
int getWkbFromGML2(const QDomNode& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
/**Creates WKB from a <Point> element*/
int getWkbFromGML2Point(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
/**Creates WKB from a <Polygon> element*/
int getWkbFromGML2Polygon(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
/**Creates WKB from a <LineString> element*/
int getWkbFromGML2LineString(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
/**Creates WKB from a <MultiPoint> element*/
int getWkbFromGML2MultiPoint(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
/**Creates WKB from a <MultiLineString> element*/
int getWkbFromGML2MultiLineString(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
/**Creates WKB from a <MultiPolygon> element*/
int getWkbFromGML2MultiPolygon(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
/**Reads the <gml:coordinates> element and extracts the coordinates as points
@param coords list where the found coordinates are appended
@param elem the <gml:coordinates> element
@return 0 in case of success*/
int readGML2Coordinates(std::list<QgsPoint>& coords, const QDomElement elem) const;
/**Tries to create a QgsSpatialRefSys object and assign it to mSourceSRS. Returns 0 in case of success*/
int setSRSFromGML2(const QDomElement& wfsCollectionElement);
//GML3 specific methods. Not needed at the moment as most servers support GML2
#if 0
/**Evaluates the <gml:boundedBy> element
@return 0 in case of success*/
int getExtentFromGML(QgsRect* extent, const QDomElement& wfsCollectionElement) const;
int getExtentFromGML3(QgsRect* extent, const QDomElement& wfsCollectionElement) const;
/**Turns GML into QGIS features
@param wfsCollectionElement reference to the GML parent element
@param geometryAttribute the name of the attribute containing the geometry
@param features the vector where pointers to the features are filled (the features have to be deleted after usage)
@return 0 in case of success*/
int getFeaturesFromGML(const QDomElement& wfsCollectionElement, const QString& geometryAttribute, std::vector<QgsFeature*>& features) const;
int getFeaturesFromGML3(const QDomElement& wfsCollectionElement, const QString& geometryAttribute, std::vector<QgsFeature*>& features) const;
/**Turns a GML geometry attribute element (and its contents) into wkb. This function delegates the work to the geometry type specific functions below.
@param wkb allocated geometry data
@param wkbSize size of the allocated data
@param type wkb type (point/multipoint/line/multiline/polygon/multipolygon)
@return 0 in case of success*/
int getWkbFromGML(const QDomNode& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
int getWkbFromGMLPoint(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
int getWkbFromGMLLineString(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
int getWkbFromGMLPolygon(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
int getWkbFromGMLMultiSurface(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
int getWkbFromMultiCurve(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
int getWkbFromGML3(const QDomNode& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
int getWkbFromGML3Point(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
int getWkbFromGML3LineString(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
int getWkbFromGML3Polygon(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
int getWkbFromGML3MultiSurface(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
int getWkbFromGML3MultiCurve(const QDomElement& geometryElement, unsigned char** wkb, int* wkbSize, QGis::WKBTYPE* type) const;
/**Takes a <gml:pos> or <gml:posList> element and fills the coordinates into the passed list
@param coords the list where the coordinates are filled into
@param elem the <gml:pos> or <gml:posList> element
@ -143,10 +175,8 @@ class QgsWFSProvider: public QgsVectorDataProvider
int readCoordinatesFromPosList(std::list<QgsPoint>& coords, const QDomElement elem) const;
/**Tries to create a QgsSpatialRefSys object and assign it to mSourceSRS. Returns 0 in case of success*/
int setSRSFromGML(const QDomElement& wfsCollectionElement);
/***/
void fillMinMaxCash();
int setSRSFromGML3(const QDomElement& wfsCollectionElement);
#endif //0 methods for GML3
};
#endif