Package org.eclipse.rdf4j.model.impl

Class AbstractModel

java.lang.Object

java.util.AbstractCollection<Statement>

java.util.AbstractSet<Statement>

org.eclipse.rdf4j.model.impl.AbstractModel

All Implemented Interfaces:

Serializable, Iterable<Statement>, Collection<Statement>, Set<Statement>, Model, NamespaceAware

Direct Known Subclasses:

AbstractMemoryOverflowModel, EmptyModel, FilteredModel, LinkedHashModel, SailModel, TreeModel

public abstract class AbstractModel
extends AbstractSet<Statement>
implements Model

Provides basic operations that are common to all Models.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final Resource[]	NULL_CONTEXT

Constructor Summary

Constructors

Constructor	Description
AbstractModel()

Method Summary

Modifier and Type	Method	Description
boolean	add(Statement st)
boolean	addAll(Collection<? extends Statement> c)
void	clear()
boolean	clear(Resource... contexts)	Removes statements with the specified context exist in this model.
protected void	closeIterator(Iterator<?> iter)	Cleans up any resources used by this iterator.
boolean	contains(Object o)
boolean	containsAll(Collection<?> c)
Set<Resource>	contexts()	Returns a Set view of the contexts contained in this model.
boolean	isEmpty()
Set<Value>	objects()	Returns a Set view of the objects contained in this model.
Set<IRI>	predicates()	Returns a Set view of the predicates contained in this model.
boolean	remove(Object o)
boolean	removeAll(Collection<?> c)
abstract void	removeTermIteration(Iterator<Statement> iter, Resource subj, IRI pred, Value obj, Resource... contexts)	Called by aggregate sets when a term has been removed from a term iterator.
boolean	retainAll(Collection<?> c)
Set<Resource>	subjects()	Returns a Set view of the subjects contained in this model.
Object[]	toArray()
<T> T[]	toArray(T[] a)
Model	unmodifiable()	Returns an unmodifiable view of this model.

Methods inherited from class java.util.AbstractSet

equals, hashCode

Methods inherited from class java.util.AbstractCollection

iterator, size, 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, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface org.eclipse.rdf4j.model.Model

add, contains, filter, getStatements, remove, removeNamespace, setNamespace, setNamespace

Methods inherited from interface org.eclipse.rdf4j.model.NamespaceAware

getNamespace, getNamespaces

Methods inherited from interface java.util.Set

equals, hashCode, iterator, size, spliterator

Field Details

NULL_CONTEXT

public static final Resource[] NULL_CONTEXT

Constructor Details

AbstractModel

public AbstractModel()

Method Details

unmodifiable

public Model unmodifiable()

Description copied from interface: Model

Returns an unmodifiable view of this model. This method provides "read-only" access to this model. Query operations on the returned model "read through" to this model, and attempts to modify the returned model, whether direct or via its iterator, result in an UnsupportedOperationException.

Specified by:

unmodifiable in interface Model

Returns:

an unmodifiable view of the specified set.

add

public boolean add(Statement st)

Specified by:

add in interface Collection<Statement>

Specified by:

add in interface Set<Statement>

Overrides:

add in class AbstractCollection<Statement>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<Statement>

Specified by:

isEmpty in interface Set<Statement>

Overrides:

isEmpty in class AbstractCollection<Statement>

containsAll

public boolean containsAll(Collection<?> c)

Specified by:

containsAll in interface Collection<Statement>

Specified by:

containsAll in interface Set<Statement>

Overrides:

containsAll in class AbstractCollection<Statement>

removeAll

public boolean removeAll(Collection<?> c)

Specified by:

removeAll in interface Collection<Statement>

Specified by:

removeAll in interface Set<Statement>

Overrides:

removeAll in class AbstractSet<Statement>

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<Statement>

Specified by:

toArray in interface Set<Statement>

Overrides:

toArray in class AbstractCollection<Statement>

toArray

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

Specified by:

toArray in interface Collection<Statement>

Specified by:

toArray in interface Set<Statement>

Overrides:

toArray in class AbstractCollection<Statement>

addAll

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

Specified by:

addAll in interface Collection<Statement>

Specified by:

addAll in interface Set<Statement>

Overrides:

addAll in class AbstractCollection<Statement>

retainAll

public boolean retainAll(Collection<?> c)

Specified by:

retainAll in interface Collection<Statement>

Specified by:

retainAll in interface Set<Statement>

Overrides:

retainAll in class AbstractCollection<Statement>

clear

public void clear()

Specified by:

clear in interface Collection<Statement>

Specified by:

clear in interface Set<Statement>

Overrides:

clear in class AbstractCollection<Statement>

clear

public boolean clear(Resource... contexts)

Description copied from interface: Model

Removes statements with the specified context exist in this model.

Specified by:

clear in interface Model

Parameters:

contexts - The context of the statements to remove.

Returns:

true if one or more statements have been removed.

remove

public boolean remove(Object o)

Specified by:

remove in interface Collection<Statement>

Specified by:

remove in interface Set<Statement>

Overrides:

remove in class AbstractCollection<Statement>

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection<Statement>

Specified by:

contains in interface Set<Statement>

Overrides:

contains in class AbstractCollection<Statement>

subjects

public Set<Resource> subjects()

Description copied from interface: Model

Returns a Set view of the subjects contained in this model. The set is backed by the model, so changes to the model are reflected in the set, and vice-versa. If the model is modified while an iteration over the set is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The set supports element removal, which removes all statements from the model for which that element is a subject value, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations if the parameters pred or obj are null.

Specified by:

subjects in interface Model

Returns:

a set view of the subjects contained in this model

predicates

public Set<IRI> predicates()

Description copied from interface: Model

Returns a Set view of the predicates contained in this model. The set is backed by the model, so changes to the model are reflected in the set, and vice-versa. If the model is modified while an iteration over the set is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The set supports element removal, which removes all statements from the model for which that element is a predicate value, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations if the parameters subj or obj are null.

Specified by:

predicates in interface Model

Returns:

a set view of the predicates contained in this model

objects

public Set<Value> objects()

Description copied from interface: Model

Returns a Set view of the objects contained in this model. The set is backed by the model, so changes to the model are reflected in the set, and vice-versa. If the model is modified while an iteration over the set is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The set supports element removal, which removes all statements from the model for which that element is an object value, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations if the parameters subj or pred are null.

Specified by:

objects in interface Model

Returns:

a set view of the objects contained in this model

contexts

public Set<Resource> contexts()

Description copied from interface: Model

Returns a Set view of the contexts contained in this model. The set is backed by the model, so changes to the model are reflected in the set, and vice-versa. If the model is modified while an iteration over the set is in progress (except through the iterator's own remove operation), the results of the iteration are undefined. The set supports element removal, which removes all statements from the model for which that element is a context value, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations if the parameters subj , pred or obj are null.

Specified by:

contexts in interface Model

Returns:

a set view of the contexts contained in this model

removeTermIteration

public abstract void removeTermIteration(Iterator<Statement> iter,
 Resource subj,
 IRI pred,
 Value obj,
 Resource... contexts)

Called by aggregate sets when a term has been removed from a term iterator. Exactly one of the last four terms will be non-empty.

Parameters:

iter - The iterator used to navigate the live set (never null)

subj - the subject term to be removed or null

pred - the predicate term to be removed or null

obj - the object term to be removed or null

contexts - an array of one context term to be removed or an empty array

closeIterator

protected void closeIterator(Iterator<?> iter)

Cleans up any resources used by this iterator. After this call the given iterator should not be used.

Parameters:

iter - Iterator to clean up