org.openrdf.model.impl
Class GraphImpl

java.lang.Object
  java.util.AbstractCollection<Statement>
      org.openrdf.model.impl.GraphImpl

All Implemented Interfaces:

Serializable, Iterable<Statement>, Collection<Statement>, Graph

public class GraphImpl
extends AbstractCollection<Statement>
implements Graph

Author:

Arjohn Kampman

See Also:

Serialized Form

Field Summary

protected LinkedList<Statement>	statements
protected ValueFactory	valueFactory

Constructor Summary

GraphImpl()

GraphImpl(Collection<? extends Statement> statements)

GraphImpl(ValueFactory valueFactory)

GraphImpl(ValueFactory valueFactory, Collection<? extends Statement> statements)

Method Summary

boolean	add(Resource subj, URI pred, Value obj, Resource... contexts) Adds one or more statements to the graph.
boolean	add(Statement st)
ValueFactory	getValueFactory() Gets the value factory for this graph.
Iterator<Statement>	iterator()
Iterator<Statement>	match(Resource subj, URI pred, Value obj, Resource... contexts) Gets the statements with the specified subject, predicate, object and (optionally) context.
void	setValueFactory(ValueFactory valueFactory)
int	size()

Methods inherited from class java.util.AbstractCollection

addAll, clear, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

addAll, clear, contains, containsAll, equals, hashCode, isEmpty, remove, removeAll, retainAll, toArray, toArray

Field Detail

statements

protected LinkedList<Statement> statements

valueFactory

protected transient ValueFactory valueFactory

Constructor Detail

GraphImpl

public GraphImpl(ValueFactory valueFactory)

GraphImpl

public GraphImpl()

GraphImpl

public GraphImpl(ValueFactory valueFactory,
                 Collection<? extends Statement> statements)

GraphImpl

public GraphImpl(Collection<? extends Statement> statements)

Method Detail

getValueFactory

public ValueFactory getValueFactory()

Description copied from interface: Graph

Gets the value factory for this graph.

Specified by:

getValueFactory in interface Graph

setValueFactory

public void setValueFactory(ValueFactory valueFactory)

iterator

public Iterator<Statement> iterator()

Specified by:

iterator in interface Iterable<Statement>

Specified by:

iterator in interface Collection<Statement>

Specified by:

iterator in class AbstractCollection<Statement>

size

public int size()

Specified by:

size in interface Collection<Statement>

Specified by:

size in class AbstractCollection<Statement>

add

public boolean add(Statement st)

Specified by:

add in interface Collection<Statement>

Overrides:

add in class AbstractCollection<Statement>

add

public boolean add(Resource subj,
                   URI pred,
                   Value obj,
                   Resource... contexts)

Description copied from interface: Graph

Adds one or more statements to the graph. This method creates a statement for each specified context and adds those to the graph. If no contexts are specified, a single statement with no associated context is added.

Specified by:

add in interface Graph

Parameters:

subj - The statement's subject, must not be null.

pred - The statement's predicate, must not be null.

obj - The statement's object, must not be null.

contexts - The contexts to add statements to.

match

public Iterator<Statement> match(Resource subj,
                                 URI pred,
                                 Value obj,
                                 Resource... contexts)

Description copied from interface: Graph

Gets the statements with the specified subject, predicate, object and (optionally) context. The subject, predicate and object parameters can be null to indicate wildcards. The contexts parameter is a wildcard and accepts zero or more values. If no contexts are specified, statements will match disregarding their context. If one or more contexts are specified, statements with a context matching one of these will match. Note: to match statements without an associated context, specify the value null and explicitly cast it to type Resource.

Examples: graph.match(s1, null, null) matches all statements that have subject s1,
graph.match(null, null, null, c1) matches all statements that have context c1,
graph.match(null, null, null, (Resource)null) matches all statements that have no associated context,
graph.match(null, null, null, c1, c2, c3) matches all statements that have context c1, c2 or c3.

Specified by:

match in interface Graph

Parameters:

subj - The subject of the statements to match, null to match statements with any subject.

pred - The predicate of the statements to match, null to match statements with any predicate.

obj - The object of the statements to match, null to match statements with any object.

contexts - The contexts of the statements to match. If no contexts are specified, statements will match disregarding their context. If one or more contexts are specified, statements with a context matching one of these will match.

Returns:

The statements that match the specified pattern.