org.apache.clerezza.utils

Class UnionGraph

java.lang.Object

java.util.AbstractCollection<Triple>

org.apache.clerezza.implementation.graph.AbstractGraph

org.apache.clerezza.utils.UnionGraph

All Implemented Interfaces:

Iterable<Triple>, Collection<Triple>, Graph

Direct Known Subclasses:

UnionWatchableGraph

public class UnionGraph
extends AbstractGraph

This class represents the union of multiple triple collections. A UnionGraph appears like a merge of the different graphs (see. http://www.w3.org/TR/rdf-mt/#graphdefs).

Author:

hasan

Field Summary

Fields

Modifier and Type	Field and Description
protected Graph[]	baseTripleCollections

Constructor Summary

Constructors

Constructor and Description
UnionGraph(Graph... baseTripleCollections) Constructs a UnionGraph over the specified baseTripleCollections.

Method Summary

Modifier and Type	Method and Description
boolean	add(Triple e)
boolean	equals(Object obj) Returns true if other describes the same graph and will always describe the same graph as this instance, false otherwise.
ReadWriteLock	getLock() The lock provided by this methods allows to create read- and write-locks that span multiple method calls.
int	hashCode()
Iterator<Triple>	performFilter(BlankNodeOrIRI subject, IRI predicate, RDFTerm object)
int	performSize()
boolean	remove(Object e)

Methods inherited from class org.apache.clerezza.implementation.graph.AbstractGraph

addAll, clear, contains, containsAll, filter, getImmutableGraph, isEmpty, iterator, performAdd, performAddAll, performClear, performContains, performContainsAll, performGetImmutableGraph, performIsEmpty, performIterator, performRemove, performRemoveAll, performRetainAll, performToArray, performToArray, removeAll, retainAll, size, toArray, toArray

Methods inherited from class java.util.AbstractCollection

toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, removeIf, spliterator, stream

Methods inherited from interface java.lang.Iterable

forEach

Field Detail

baseTripleCollections

protected Graph[] baseTripleCollections

Constructor Detail

UnionGraph

public UnionGraph(Graph... baseTripleCollections)

Constructs a UnionGraph over the specified baseTripleCollections. Write and delete operations are forwarded to the first baseTripleCollections.

Parameters:

baseTripleCollections - the baseTripleCollections

Method Detail

performSize

public int performSize()

Specified by:

performSize in class AbstractGraph

performFilter

public Iterator<Triple> performFilter(BlankNodeOrIRI subject,
                                      IRI predicate,
                                      RDFTerm object)

Specified by:

performFilter in class AbstractGraph

add

public boolean add(Triple e)

Specified by:

add in interface Collection<Triple>

Overrides:

add in class AbstractGraph

remove

public boolean remove(Object e)

Specified by:

remove in interface Collection<Triple>

Overrides:

remove in class AbstractGraph

equals

public boolean equals(Object obj)

Description copied from interface: Graph

Returns true if other describes the same graph and will always describe the same graph as this instance, false otherwise. It returns true if this == other or if it is otherwise guaranteed that changes to one of the instances are immediately reflected in the other or if both graphs are immutable.

Specified by:

equals in interface Collection<Triple>

Specified by:

equals in interface Graph

Overrides:

equals in class AbstractGraph

Returns:

true if other == this

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<Triple>

Overrides:

hashCode in class Object

getLock

public ReadWriteLock getLock()

Description copied from interface: Graph

The lock provided by this methods allows to create read- and write-locks that span multiple method calls. Having a read locks prevents other threads from writing to this Graph, having a write-lock prevents other threads from reading and writing. Implementations would typically return a java.util.concurrent.locks.ReentrantReadWriteLock. Immutable instances (such as instances of ImmutableGraph) or instances used in transaction where concurrent acces of the same instance is not an issue may return a no-op ReadWriteLock (i.e. one which returned ReadLock and WriteLock instances of which the methods do not do anything)

Specified by:

getLock in interface Graph

Overrides:

getLock in class AbstractGraph

Returns:

the lock of this Graph