org.openanzo.model.impl
Class QuadStore

java.lang.Object
  org.openanzo.model.impl.QuadStore

Direct Known Subclasses:

NamedGraphContainer

public class QuadStore
extends java.lang.Object

Core storage of quads with indexes for s,p,o,c, po, and sp

Author:

Matthew Roy ( mroy@cambridgesemantics.com )

Constructor Summary

QuadStore()
Initialize quadstore's statement set and indexes

Method Summary

void	add(org.openrdf.model.Statement... statements) Add statements to store and index them
void	clear() Clear statements and indexes from memory
boolean	contains(org.openrdf.model.Resource subj, org.openrdf.model.URI prop, org.openrdf.model.Value obj, org.openrdf.model.Resource... contexts) Tests if a statement is contained in store that match provided parameters
boolean	contains(org.openrdf.model.Statement match) Tests if a statement is contained in the store.
void	delete(org.openrdf.model.Statement... statements) Delete statements from store and remove indexes
java.util.Collection<org.openrdf.model.Statement>	findStatements(org.openrdf.model.Resource subj, org.openrdf.model.URI prop, org.openrdf.model.Value obj, org.openrdf.model.Resource... contexts) Find set of statements that match provided parameters
java.util.Collection<org.openrdf.model.Statement>	getAllStatements() Return all statements in the store
java.util.Set<org.openrdf.model.URI>	getContexts() Return the set of contexts contained within store
boolean	isEmpty() Return if store is empty
boolean	isEmpty(org.openrdf.model.Resource... contexts) Return if store is empty for given contexts
int	size() Return the number of statements in the store
int	size(org.openrdf.model.Resource... contexts) Return the number of statements in the store for given contexts

Methods inherited from class java.lang.Object

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

Constructor Detail

QuadStore

public QuadStore()

Initialize quadstore's statement set and indexes

Method Detail

add

public void add(org.openrdf.model.Statement... statements)

Add statements to store and index them

Parameters:

statements - Statements to add

Throws:

AnzoRuntimeException - if the context of a statement is null

delete

public void delete(org.openrdf.model.Statement... statements)

Delete statements from store and remove indexes

Parameters:

statements - Statements to delete

Throws:

AnzoRuntimeException - if the context of a statement is null

findStatements

public java.util.Collection<org.openrdf.model.Statement> findStatements(org.openrdf.model.Resource subj,
                                                                        org.openrdf.model.URI prop,
                                                                        org.openrdf.model.Value obj,
                                                                        org.openrdf.model.Resource... contexts)

Find set of statements that match provided parameters

Parameters:

subj - Subject value to match, or wildcard if null

prop - Property value to match, or wildcard if null

obj - Object value to match, or wildcard if null

contexts - Context value to match, or wildcard if null

Returns:

Collection of matching statements

getAllStatements

public java.util.Collection<org.openrdf.model.Statement> getAllStatements()

Return all statements in the store

Returns:

Collection of statements in store

contains

public boolean contains(org.openrdf.model.Statement match)

Tests if a statement is contained in the store.

Parameters:

match - is the statement to be tested

Returns:

boolean result to indicate if the statement was contained in store

contains

public boolean contains(org.openrdf.model.Resource subj,
                        org.openrdf.model.URI prop,
                        org.openrdf.model.Value obj,
                        org.openrdf.model.Resource... contexts)

Tests if a statement is contained in store that match provided parameters

Parameters:

subj - Subject value to match, or wildcard if null

prop - Property value to match, or wildcard if null

obj - Object value to match, or wildcard if null

contexts - Context value to match, or wildcard if null

Returns:

boolean result to indicate if the statement was contained in store

clear

public void clear()

Clear statements and indexes from memory

size

public int size()

Return the number of statements in the store

Returns:

the number of statements in the store

isEmpty

public boolean isEmpty()

Return if store is empty

Returns:

if store is empty

isEmpty

public boolean isEmpty(org.openrdf.model.Resource... contexts)

Return if store is empty for given contexts

Parameters:

contexts - to check for any contents

Returns:

if store is empty for given contexts

size

public int size(org.openrdf.model.Resource... contexts)

Return the number of statements in the store for given contexts

Parameters:

contexts - to determine size of in container

Returns:

the number of statements in the store for given contexts

getContexts

public java.util.Set<org.openrdf.model.URI> getContexts()

Return the set of contexts contained within store

Returns:

collection of contexts contained within store