Module org.apache.jena.geosparql

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

Class AccessGeoSPARQL

java.lang.Object

org.apache.jena.geosparql.implementation.access.AccessGeoSPARQL

public class AccessGeoSPARQL
extends Object

Central place for accessing GeoSparql spatial objects in a Graph. Note: Using the "GeoLiterals" methods on RDF data that do not conform to the GeoSparql specification will return whatever values are present - regardless of whether those values are valid literals.

Constructor Summary

Constructors

Constructor	Description
AccessGeoSPARQL()

Method Summary

Modifier and Type	Method	Description
static boolean	containsGeoLiterals(org.apache.jena.graph.Graph graph)	True iff the graph contains geometry literals.
static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple>	findDefaultGeoResources(org.apache.jena.graph.Graph graph)
static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple>	findSpecificGeoLiterals(org.apache.jena.graph.Graph graph)	Iterate all triples of geometry resources with their most specific serialization form.
static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple>	findSpecificGeoLiterals(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node geometry)	Iterate a given geometry resource's most specific geometry literals.
static Iterator<org.apache.jena.graph.Triple>	findSpecificGeoLiteralsByFeature(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node feature)	Resolve a feature to its set of specific geometries via the following chain:
static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple>	findSpecificGeoResources(org.apache.jena.graph.Graph graph)	Find all triples with geo:hasDefaultGeometry and geo:hasGeometry predicates.
static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple>	findSpecificGeoResources(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node feature)
static org.apache.jena.graph.Node	getGeoLiteral(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node geometry)
static org.apache.jena.graph.Triple	getGeoLiteralTriple(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node geometry)
static boolean	hasGeoLiterals(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node geometry)	True iff the node has geometry literals.
static boolean	hasGeoResources(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node feature)	True if the node has a geometry or default geometry.
static boolean	isPredicateOfFeature(org.apache.jena.graph.Node n)
static boolean	isPredicateOfGeoResource(org.apache.jena.graph.Node n)
static boolean	isSpatialObjectByProperties(org.apache.jena.graph.Graph graph, org.apache.jena.graph.Node featureOrGeometry)	True if the node is a geosparql spatial object by the present (geometry-related) properties.
static boolean	isTripleOfFeature(org.apache.jena.graph.Triple t)
static boolean	isTripleOfGeoResource(org.apache.jena.graph.Triple t)

Methods inherited from class java.lang.Object

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

Constructor Details

AccessGeoSPARQL

public AccessGeoSPARQL()

Method Details

isPredicateOfFeature

public static boolean isPredicateOfFeature(org.apache.jena.graph.Node n)

isPredicateOfGeoResource

public static boolean isPredicateOfGeoResource(org.apache.jena.graph.Node n)

isTripleOfFeature

public static boolean isTripleOfFeature(org.apache.jena.graph.Triple t)

isTripleOfGeoResource

public static boolean isTripleOfGeoResource(org.apache.jena.graph.Triple t)

containsGeoLiterals

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

True iff the graph contains geometry literals.

hasGeoLiterals

public static boolean hasGeoLiterals(org.apache.jena.graph.Graph graph,
 org.apache.jena.graph.Node geometry)

True iff the node has geometry literals. Arguments must not be null.

hasGeoResources

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

True if the node has a geometry or default geometry. Arguments must not be null.

isSpatialObjectByProperties

public static boolean isSpatialObjectByProperties(org.apache.jena.graph.Graph graph,
 org.apache.jena.graph.Node featureOrGeometry)

True if the node is a geosparql spatial object by the present (geometry-related) properties. A mere "SpatialObject" type does not count. Arguments must not be null. Wgs84 does not count

findSpecificGeoResources

public static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple> findSpecificGeoResources(org.apache.jena.graph.Graph graph)

Find all triples with geo:hasDefaultGeometry and geo:hasGeometry predicates. If a feature has a default geometry, then this method will omit all its (non-default) geometries.

findDefaultGeoResources

public static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple> findDefaultGeoResources(org.apache.jena.graph.Graph graph)

findSpecificGeoResources

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

findSpecificGeoLiteralsByFeature

public static Iterator<org.apache.jena.graph.Triple> findSpecificGeoLiteralsByFeature(org.apache.jena.graph.Graph graph,
 org.apache.jena.graph.Node feature)

Resolve a feature to its set of specific geometries via the following chain:

   feature -> (geo:hasDefaultGeometry, geo:hasGeometry) ->
     ({geo:asWKT, geo:asGML}, geo:hasSerialization) -> geo-literal.
 

If a geo:hasDefaultGeometry does not lead to a valid geo-literal there is no backtracking to geo:hasGeometry.

findSpecificGeoLiterals

public static org.apache.jena.util.iterator.ExtendedIterator<org.apache.jena.graph.Triple> findSpecificGeoLiterals(org.apache.jena.graph.Graph graph)

Iterate all triples of geometry resources with their most specific serialization form. The specific properties geo:asWKT and geo:asGML take precedence over the more general geo:hasSerialization. This means if a resource has wkt and/or gml then all geo:hasSerialization triples will be omitted for it.

findSpecificGeoLiterals

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

Iterate a given geometry resource's most specific geometry literals. The geometry resource must not be null. A specific serialization (WKT, GML) takes precedence over the more general hasSerialization property.

getGeoLiteral

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

getGeoLiteralTriple

public static org.apache.jena.graph.Triple getGeoLiteralTriple(org.apache.jena.graph.Graph graph,
 org.apache.jena.graph.Node geometry)