Shared/com.erfangholami.androidsolidservices.shared.model.resource/RDFResource

RDFResource

An RDF source: a resource whose representation is a set of RDF triples.

The triples are held in memory as a list of RdfQuads and serialized to JSON-LD by getEntity. You read and edit individual properties with findProperty / findAllProperties (and their per-subject variants) and addQuad / addQuadLiteral / clearProperties, rather than manipulating raw RDF text.

By convention the resource's own primary subject is the document URI with the fragment #it; the per-subject query/mutation overloads default to that subject.

For resources fetched from a Solid server, prefer the SolidRDFResource subtype, which also exposes the response SolidMetadata. Use this base type for RDF documents you construct locally.

See the Solid Protocol (https://solidproject.org/TR/protocol) and LDP (http://www.w3.org/TR/ldp/) for the RDF source model.

Inheritors

SolidRDFResource

Constructors

RDFResource

constructor(identifier: String)

constructor(identifier: String, quads: List<RdfQuad>?)

constructor(identifier: String, quads: List<RdfQuad>?, headers: SolidHeaders?)

constructor(identifier: String, contentType: String, quads: List<RdfQuad>?)

constructor(identifier: String, contentType: String, quads: List<RdfQuad>?, headers: SolidHeaders?)

Types

Companion

object Companion

Functions

addQuad

fun addQuad(subject: String, predicate: String, obj: String, maxNumber: Int = 1)

Adds a triple whose object is an IRI (or blank node).

addQuadLiteral

fun addQuadLiteral(subject: String, predicate: String, value: String, datatype: String? = XSD.STRING, language: String? = null, maxNumber: Int = 1)

Adds a triple whose object is a literal.

clearProperties

fun clearProperties(predicate: String, subject: String = itselfSubject)

Removes every triple with the given predicate for subject.

open override fun close()

describeContents

open override fun describeContents(): Int

ensureType

fun ensureType(subject: String, typeIri: String)

Ensures subject carries an rdf:type triple with typeIri, preserving any other type triples already present.

findAllProperties

fun findAllProperties(predicate: String): List<String>

Returns the object values of every triple with the given predicate, across all subjects.

findAllPropertiesForSubject

fun findAllPropertiesForSubject(subject: String, predicate: String): List<String>

Returns the object values of every triple matching the given subject and predicate.

findProperty

fun findProperty(predicate: String): String?

Returns the object value of the first triple with the given predicate, or null if none.

findPropertyForSubject

fun findPropertyForSubject(subject: String, predicate: String): String?

Returns the object value of the first triple matching subject and predicate, or null.

getAllQuads

fun getAllQuads(): List<RdfQuad>

Returns a snapshot copy of all triples held by this resource.

getContentType

open override fun getContentType(): String

The media type of the resource representation (the value of its Content-Type).

getEntity

open override fun getEntity(): InputStream

Returns the resource representation as a byte stream.

getHeaders

open override fun getHeaders(): SolidHeaders

The HTTP headers associated with this resource (empty when constructed locally).

getIdentifier

open override fun getIdentifier(): String

The URI that identifies this resource on the pod.

writeToParcel

open override fun writeToParcel(dest: Parcel, flags: Int)