Module org.apache.jena.geosparql

Package org.apache.jena.geosparql.implementation.access

Class AccessWGS84

java.lang.Object

org.apache.jena.geosparql.implementation.access.AccessWGS84

public class AccessWGS84
extends Object

Central place for accessing Wgs84 point geometries in a Graph.

Constructor Summary

Constructors

Constructor	Description
AccessWGS84()

Method Summary

Modifier and Type	Method	Description
static boolean	containsGeoLiteralProperties(org.apache.jena.graph.Graph graph)	True iff the graph contains wgs84:{lat, long} triples.
static org.apache.jena.util.iterator.ExtendedIterator<Map.Entry<org.apache.jena.graph.Node,GeometryWrapper>>	findGeoLiterals(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node s)	For each matching resource, build geometry literals from the cartesian product of the WGS84 lat/long properties.
static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple>	findGeoLiteralsAsTriples(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node s)	For each matching resource, build triples of format 's geo:hasGeometry geometryLiteral'.
static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple>	findGeoLiteralsAsTriples(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node s, org.apache.jena.graph.Node p)	For each matching resource and its geometries, create triples of format 's p geometryLiteral'
static org.apache.jena.graph.Node	getGeoLiteral(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node s)	Read lat/lon values for the given subject.
static boolean	hasGeoLiteralProperties(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node feature)	True iff the node has wgs84:{lat, long} triples.

Methods inherited from class java.lang.Object

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

Constructor Details

AccessWGS84

public AccessWGS84()

Method Details

containsGeoLiteralProperties

public static boolean containsGeoLiteralProperties(org.apache.jena.graph.Graph graph)

True iff the graph contains wgs84:{lat, long} triples. True does not imply that there are resources that have both lat AND long properties.

hasGeoLiteralProperties

public static boolean hasGeoLiteralProperties(org.apache.jena.graph.Graph graph,
 org.apache.jena.graph.Node feature)

True iff the node has wgs84:{lat, long} triples. True does not imply that both lat AND long are present on the node.

findGeoLiteralsAsTriples

public static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple> findGeoLiteralsAsTriples(org.apache.jena.graph.Graph graph,
 org.apache.jena.graph.Node s)

For each matching resource, build triples of format 's geo:hasGeometry geometryLiteral'.

findGeoLiteralsAsTriples

public static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple> findGeoLiteralsAsTriples(org.apache.jena.graph.Graph graph,
 org.apache.jena.graph.Node s,
 org.apache.jena.graph.Node p)

For each matching resource and its geometries, create triples of format 's p geometryLiteral'

Parameters:

graph -

s - The match subject. May be null.

p - The predicate to use for creating triples. Can be chosen freely but must not be null.

Returns:

Iterator of created triples (not obtained from the graph directly).

findGeoLiterals

public static org.apache.jena.util.iterator.ExtendedIterator<Map.Entry<org.apache.jena.graph.Node,GeometryWrapper>> findGeoLiterals(org.apache.jena.graph.Graph graph,
 org.apache.jena.graph.Node s)

For each matching resource, build geometry literals from the cartesian product of the WGS84 lat/long properties. Resources must have both properties, lat and long, to be matched by this method.

getGeoLiteral

public static org.apache.jena.graph.Node getGeoLiteral(org.apache.jena.graph.Graph graph,
 org.apache.jena.graph.Node s)

Read lat/lon values for the given subject. Null if there are no such properties. Throws DatatypeFormatException when detecting incorrect use of these properties.