Module org.apache.jena.arq

Package org.apache.jena.sparql.graph

Class GraphOps

java.lang.Object

org.apache.jena.sparql.graph.GraphOps

public class GraphOps
extends Object

Some operations on graphs

Constructor Summary

Constructors

Constructor	Description
GraphOps()

Method Summary

Modifier and Type	Method	Description
static void	addAll(Graph g, Iterable<Triple> iter)
static void	addAll(Graph g, Iterator<Triple> iter)
static boolean	containsGraph(DatasetGraph dsg, Node gn)	Check whether a dataset contains a named graph of the given name.
static void	deleteAll(Graph g, Iterable<Triple> iter)
static void	deleteAll(Graph g, Iterator<Triple> iter)
static Graph	getGraph(DatasetGraph dsg, Node gn)	Get a graph from the dataset - the graph name may be special - the union graph (which is immutable) or a special name for the default graph.
static boolean	isWrapped(Graph graph)	Remove one layer of graph wrapping.
static Graph	unionGraph(DatasetGraph dsg)	Create an immutable union graph of all the named graphs in the dataset.
static Graph	unionGraph(DatasetGraph dsg, Set<Node> graphNames)	Create an immutable union graph comprised of a set of named graphs.
static Graph	unwrapAll(Graph graph)	Remove all layers of graph wrapping.
static Graph	unwrapOne(Graph graph)	Remove one layer of graph wrapping.

Methods inherited from class java.lang.Object

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

Constructor Details

GraphOps

public GraphOps()

Method Details

containsGraph

public static boolean containsGraph(DatasetGraph dsg,
 Node gn)

Check whether a dataset contains a named graph of the given name. Graph with special names (union and default) return true.

getGraph

public static Graph getGraph(DatasetGraph dsg,
 Node gn)

Get a graph from the dataset - the graph name may be special - the union graph (which is immutable) or a special name for the default graph.

A graph name of "null" is interpreted as the default graph.

unionGraph

public static Graph unionGraph(DatasetGraph dsg,
 Set<Node> graphNames)

Create an immutable union graph comprised of a set of named graphs.

unionGraph

public static Graph unionGraph(DatasetGraph dsg)

Create an immutable union graph of all the named graphs in the dataset. Future changes to the set of graphs in the dataset will be seen.

addAll

public static void addAll(Graph g,
 Iterator<Triple> iter)

addAll

public static void addAll(Graph g,
 Iterable<Triple> iter)

deleteAll

public static void deleteAll(Graph g,
 Iterator<Triple> iter)

deleteAll

public static void deleteAll(Graph g,
 Iterable<Triple> iter)

unwrapAll

public static Graph unwrapAll(Graph graph)

Remove all layers of graph wrapping. Returns the original graph if not wrapped at all.

isWrapped

public static boolean isWrapped(Graph graph)

Remove one layer of graph wrapping.

unwrapOne

public static Graph unwrapOne(Graph graph)

Remove one layer of graph wrapping. Returns the original graph if not wrapped at all.