org.apache.clerezza.implementation.graph

Class AbstractGraph

java.lang.Object

java.util.AbstractCollection<Triple>

org.apache.clerezza.implementation.graph.AbstractGraph

All Implemented Interfaces:

Iterable<Triple>, Collection<Triple>, Graph

Direct Known Subclasses:

AbstractImmutableGraph, SimpleGraph, UnionGraph, WriteBlockedGraph

public abstract class AbstractGraph
extends AbstractCollection<Triple>
implements Graph

An abstract implementation of Graph implementing iterator and contains calling filter.

Author:

reto

Constructor Summary

Constructors

Constructor and Description
AbstractGraph() Constructs a LocalbleMGraph for an Graph.
AbstractGraph(ReadWriteLock lock)

Method Summary

Modifier and Type	Method and Description
boolean	add(Triple e)
boolean	addAll(Collection<? extends Triple> c)
void	clear()
boolean	contains(Object o)
boolean	containsAll(Collection<?> c)
boolean	equals(Object obj) Returns true if other describes the same graph and will always describe the same graph as this instance, false otherwise.
Iterator<Triple>	filter(BlankNodeOrIRI subject, IRI predicate, RDFTerm object) Filters triples given a pattern.
ImmutableGraph	getImmutableGraph() Returns an ImutableGraph describing the graph at the current point in time.
ReadWriteLock	getLock() The lock provided by this methods allows to create read- and write-locks that span multiple method calls.
boolean	isEmpty()
Iterator<Triple>	iterator()
protected boolean	performAdd(Triple e)
protected boolean	performAddAll(Collection<? extends Triple> c)
protected void	performClear()
protected boolean	performContains(Object o)
protected boolean	performContainsAll(Collection<?> c)
protected abstract Iterator<Triple>	performFilter(BlankNodeOrIRI subject, IRI predicate, RDFTerm object)
ImmutableGraph	performGetImmutableGraph()
protected boolean	performIsEmpty()
protected Iterator<Triple>	performIterator()
protected boolean	performRemove(Object o)
protected boolean	performRemoveAll(Collection<?> c)
protected boolean	performRetainAll(Collection<?> c)
protected abstract int	performSize()
protected Object[]	performToArray()
protected <T> T[]	performToArray(T[] a)
boolean	remove(Object o)
boolean	removeAll(Collection<?> c)
boolean	retainAll(Collection<?> c)
int	size()
Object[]	toArray()
<T> T[]	toArray(T[] a)

Methods inherited from class java.util.AbstractCollection

toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

hashCode, parallelStream, removeIf, spliterator, stream

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

AbstractGraph

public AbstractGraph()

Constructs a LocalbleMGraph for an Graph.

Parameters:

providedMGraph - a non-lockable graph

AbstractGraph

public AbstractGraph(ReadWriteLock lock)

Method Detail

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

Returns:

the lock of this Graph

getImmutableGraph

public ImmutableGraph getImmutableGraph()

Description copied from interface: Graph

Returns an ImutableGraph describing the graph at the current point in time. if this is an instance of ImmutableGraph this can safely return this.

Specified by:

getImmutableGraph in interface Graph

Returns:

the current time slice of the possibly mutable graph represented by the instance.

performGetImmutableGraph

public ImmutableGraph performGetImmutableGraph()

filter

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

Description copied from interface: Graph

Filters triples given a pattern. filter(null, null, null) returns the same as iterator()

Specified by:

filter in interface Graph

Returns:

Iterator

size

public int size()

Specified by:

size in interface Collection<Triple>

Specified by:

size in class AbstractCollection<Triple>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<Triple>

Overrides:

isEmpty in class AbstractCollection<Triple>

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection<Triple>

Overrides:

contains in class AbstractCollection<Triple>

iterator

public Iterator<Triple> iterator()

Specified by:

iterator in interface Iterable<Triple>

Specified by:

iterator in interface Collection<Triple>

Specified by:

iterator in class AbstractCollection<Triple>

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<Triple>

Overrides:

toArray in class AbstractCollection<Triple>

toArray

public <T> T[] toArray(T[] a)

Specified by:

toArray in interface Collection<Triple>

Overrides:

toArray in class AbstractCollection<Triple>

containsAll

public boolean containsAll(Collection<?> c)

Specified by:

containsAll in interface Collection<Triple>

Overrides:

containsAll in class AbstractCollection<Triple>

add

public boolean add(Triple e)

Specified by:

add in interface Collection<Triple>

Overrides:

add in class AbstractCollection<Triple>

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection<Triple>

Overrides:

remove in class AbstractCollection<Triple>

addAll

public boolean addAll(Collection<? extends Triple> c)

Specified by:

addAll in interface Collection<Triple>

Overrides:

addAll in class AbstractCollection<Triple>

removeAll

public boolean removeAll(Collection<?> c)

Specified by:

removeAll in interface Collection<Triple>

Overrides:

removeAll in class AbstractCollection<Triple>

retainAll

public boolean retainAll(Collection<?> c)

Specified by:

retainAll in interface Collection<Triple>

Overrides:

retainAll in class AbstractCollection<Triple>

clear

public void clear()

Specified by:

clear in interface Collection<Triple>

Overrides:

clear in class AbstractCollection<Triple>

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 Object

Returns:

true if other == this

performFilter

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

performSize

protected abstract int performSize()

performIsEmpty

protected boolean performIsEmpty()

performToArray

protected Object[] performToArray()

performRemove

protected boolean performRemove(Object o)

performAddAll

protected boolean performAddAll(Collection<? extends Triple> c)

performRemoveAll

protected boolean performRemoveAll(Collection<?> c)

performRetainAll

protected boolean performRetainAll(Collection<?> c)

performClear

protected void performClear()

performContains

protected boolean performContains(Object o)

performIterator

protected Iterator<Triple> performIterator()

performContainsAll

protected boolean performContainsAll(Collection<?> c)

performToArray

protected <T> T[] performToArray(T[] a)

performAdd

protected boolean performAdd(Triple e)