public interface Statement
Claim
, on which it
provides additional information about references and ranking.Modifier and Type | Method and Description |
---|---|
Iterator<Snak> |
getAllQualifiers()
Returns an iterator over all qualifiers, without considering qualifier
groups.
|
Claim |
getClaim()
Get the Claim object that this statement refers to.
|
Snak |
getMainSnak()
Main Snak of the statement.
|
List<SnakGroup> |
getQualifiers()
Groups of auxiliary Snaks, also known as qualifiers, that provide
additional context information for this claim.
|
StatementRank |
getRank() |
List<Reference> |
getReferences()
Get a list of references for this Statement.
|
String |
getStatementId()
Return the id used to identify this statement.
|
EntityIdValue |
getSubject()
The subject that the claim refers to, e.g., the id of "Berlin".
|
Value |
getValue()
Convenience method to get the value of the statement's claim's main snak,
or null if there is none.
|
Statement |
withStatementId(String id)
Returns the same statement, but with a different identifier.
|
Claim getClaim()
EntityIdValue getSubject()
Snak getMainSnak()
ValueSnak
"Population: 3000000".List<SnakGroup> getQualifiers()
Iterator<Snak> getAllQualifiers()
StatementRank getRank()
StatementRank
List<Reference> getReferences()
String getStatementId()
Statement ids are used by Wikibase to allow certain interactions though the API, especially the atomic modification of Statements (modifications of statements can be viewed as deletions followed by insertions, but doing this in several steps though the API is not practical). In the current Wikibase implementation, the id is a string that begins with the (sometimes lowercased) local ID of the subject of the statement, followed by a dollar sign and a randomly generated UUID. Thus statements of different subjects can never have the same id, and it is extremely unlikely that two statements of the one subject ever have the same id. However, it is possible that two statements with the same content differ in their id, since the id is not based on the content.
Wikidata Toolkit generally requires ids to be specified but you can use the empty string to indicate that a statement has no id. This will also be respected when serializing data as JSON, i.e., rather than setting the statement id to an empty string in JSON, the key will simply be omitted. This is useful for creating new statements through the API.
Callers should not make any assumptions about the stability of statement ids over time, or about the internal format of the ids.
Value getValue()
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