Package org.wikidata.wdtk.datamodel.implementation

Class ReferenceImpl

java.lang.Object

org.wikidata.wdtk.datamodel.implementation.ReferenceImpl

All Implemented Interfaces:

Reference

public class ReferenceImpl
extends Object
implements Reference

Jackson implementation of Reference.

Author:

Fredo Erxleben, Markus Kroetzsch, Antonin Delpeuch

Constructor Summary

Constructors

Modifier	Constructor	Description
	ReferenceImpl(List<SnakGroup> groups)	Constructor.
protected	ReferenceImpl(Map<String,List<SnakImpl>> snaks, List<String> propertyOrder, String hash)	Constructor for deserialization from JSON.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
Iterator<Snak>	getAllSnaks()	Returns an interator over all snaks, without considering snak groups.
String	getHash()	Wikibase calculates a hash for each reference based on the content of the reference.
List<String>	getPropertyOrder()	Returns the list of property ids used to order snaks as found in JSON.
List<SnakGroup>	getSnakGroups()	Get the list of snak groups associated with this reference.
Map<String,List<Snak>>	getSnaks()	Returns the map of snaks as found in JSON.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

ReferenceImpl

public ReferenceImpl(List<SnakGroup> groups)

Constructor.

The order of the snaks groups provided will be respected. the properties used by the snak groups should be distinct.

Parameters:

groups - the snaks group which form the reference

ReferenceImpl

protected ReferenceImpl(Map<String,List<SnakImpl>> snaks,
 List<String> propertyOrder,
 String hash)

Constructor for deserialization from JSON.

Method Details

getSnakGroups

public List<SnakGroup> getSnakGroups()

Description copied from interface: Reference

Get the list of snak groups associated with this reference. Objects of this class are immutable, and the list should therefore not be modifiable.

Specified by:

getSnakGroups in interface Reference

Returns:

list of SnakGroups

getSnaks

public Map<String,List<Snak>> getSnaks()

Returns the map of snaks as found in JSON. Only for use by Jackson during serialization.

Returns:

the map of snaks

getHash

public String getHash()

Description copied from interface: Reference

Wikibase calculates a hash for each reference based on the content of the reference. This hash appears in the RDF serialization of the reference. Since the calculation is hard to reproduce, this is only available if the reference was read from a dump that contains the hash.

Specified by:

getHash in interface Reference

Returns:

the hash of the reference, if available, otherwise null.

getPropertyOrder

public List<String> getPropertyOrder()

Returns the list of property ids used to order snaks as found in JSON. Only for use by Jackson during serialization.

Returns:

the list of property ids

getAllSnaks

public Iterator<Snak> getAllSnaks()

Description copied from interface: Reference

Returns an interator over all snaks, without considering snak groups. The relative order of snaks is preserved.

Specified by:

getAllSnaks in interface Reference

Returns:

iterator of snaks

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object