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import { ClassRepository } from "./class-repository";
import { Store } from "./store";
import { DefinitionQueryOptions } from "./resource-repository";
import { dataFactory } from "./data-factory";
const { namedNode } = dataFactory;
/**
* A repository for retrieving properties from graphs.
*/
export class PropertyRepository extends ClassRepository {
/**
* The predicate used to indicate the domain of a property.
*/
public domainPredicate = rdfs.domain;
/**
* The predicate used to indicate the range of a property.
*/
public rangePredicate = rdfs.range;
constructor(store: Store) { super(store); }
/**
* Get all properties in the repository.
* @param options Optional options for retrieving properties.
* @returns A list of all properties in the repository.
*/
*getProperties(graphUris: string | string[] | undefined, options?: DefinitionQueryOptions): IterableIterator<string> {
const yielded = new Set<string>();
for (let q of this.store.matchAll(graphUris, null, rdf.type, rdf.Property, options?.includeInferred)) {
if (this.skip(graphUris, q.subject, options)) {
continue;
}
if (!yielded.has(q.subject.value)) {
yielded.add(q.subject.value);
yield q.subject.value;
}
}
}
/**
* Get properties of a given type.
* @param typeUri URI of a property type.
* @param includeInferred Indicate if properties of a more specific type should be included in the result.
* @returns An iterator of properties of the given type.
*/
*getRootPropertiesOfType(graphUris: string | string[] | undefined, typeUri: string, options?: DefinitionQueryOptions): IterableIterator<string> {
const yielded = new Set<string>();
const type = namedNode(typeUri);
for (let q of this.store.matchAll(graphUris, null, rdf.type, type, options?.includeInferred)) {
if (this.skip(graphUris, q.subject, options)) {
continue;
}
let hasSuperProperty = false;
let referencedSuperProperty: string | null = null;
for (let q2 of this.store.matchAll(graphUris, q.subject, rdfs.subPropertyOf, null, options?.includeInferred)) {
// Note: We have not skipped the property so it is relevant for our result. However, if we want
// to include referenced properties, then we include the referenced super property instead of the
// current one.
if (options?.includeReferenced && !this.hasSubject(graphUris, q2.object.value)) {
// We must assume that the referenced super property is of the same type as the given type or a super type of it.
referencedSuperProperty = q2.object.value;
} else if (this.skip(graphUris, q2.object, options)) {
// If the super property is skipped, then we ignore it.
continue;
}
hasSuperProperty = q2.object.value != q2.subject.value;
break;
}
// Yield referenced super property if applicable
if (referencedSuperProperty && !yielded.has(referencedSuperProperty)) {
yielded.add(referencedSuperProperty);
yield referencedSuperProperty;
}
if (hasSuperProperty) {
continue;
}
let shouldYield = false;
if (typeUri === RDF.Property && options?.includeInferred === false) {
// In the case of rdf:Property, we do not want to include properties that have a more specific type.
const t = Array.from(this.store.matchAll(graphUris, q.subject, rdf.type, null, options?.includeInferred)).map(q => q.object.value);
Eif (new Set(t).size == 1) {
shouldYield = true;
}
} else {
shouldYield = true;
}
if (shouldYield && !yielded.has(q.subject.value)) {
yielded.add(q.subject.value);
yield q.subject.value;
}
}
}
/**
* Get the super properties of a given property.
* @param subjectUri URI of a property.
* @param options Optional options for retrieving properties.
* @returns An array of super properties of the given property, an empty array if the property has no super properties.
*/
*getSuperProperties(graphUris: string | string[] | undefined, subjectUri: string, options?: DefinitionQueryOptions): IterableIterator<string> {
const yielded = new Set<string>();
const s = namedNode(subjectUri);
for (let q of this.store.matchAll(graphUris, s, rdfs.subPropertyOf, null, options?.includeInferred)) {
if (this.skip(graphUris, q.object, options)) {
continue;
}
Eif (!yielded.has(q.object.value)) {
yield q.object.value;
}
yielded.add(q.object.value);
}
}
/**
* Recursively find the first path from a given property to a root property.
* @param subjectUri URI of a property.
* @param path The current property path.
* @param backtrack Set of URIs that have already been visited.
* @param options Optional options for retrieving properties.
* @returns The first path that is found from the given property to a root class.
*/
private _getRootPropertyPath(graphUris: string | string[] | undefined, subjectUri: string, path: string[], backtrack: Set<string>, options?: DefinitionQueryOptions): string[] {
const superClasses = [...this.getSuperProperties(graphUris, subjectUri, options)];
for (let o of superClasses.filter(o => !backtrack.has(o))) {
backtrack.add(o);
return this._getRootPropertyPath(graphUris, o, [...path, o], backtrack, options);
}
return path;
}
/**
* Get the first discovered path from a given property to a root property.
* @param subjectUri URI of a property.
* @param options Optional options for retrieving properties.
* @returns A string array containing the first path that is found from the given property to a root property.
*/
getRootPropertiesPath(graphUris: string | string[] | undefined, subjectUri: string, options?: DefinitionQueryOptions): string[] {
return this._getRootPropertyPath(graphUris, subjectUri, [], new Set<string>(), options);
}
/**
* Indicate if a given property is direct or indirect (inferred) sub property of another property.
* @param graphUris URIs of the graphs to search, `undefined` for the default graph.
* @param subjectUri URI of the sub property.
* @param classUri URI of the super property.
* @param options Optional query parameters.
* @returns `true` if the property is a sub property of the other property, false otherwise.
*/
isSubPropertyOf(graphUris: string | string[] | undefined, subjectUri: string, classUri: string, options?: DefinitionQueryOptions): boolean {
return this.getRootPropertiesPath(graphUris, subjectUri, options).includes(classUri);
}
/**
* Indicate if there are sub properties of a given property.
* @param subjectUri URI of a property.
* @param options Optional options for retrieving properties.
* @returns true if the property has sub properties, false otherwise.
*/
hasSubProperties(graphUris: string | string[] | undefined, subjectUri: string, options?: DefinitionQueryOptions): boolean {
const o = namedNode(subjectUri);
for (let q of this.store.matchAll(graphUris, null, rdfs.subPropertyOf, o, options?.includeInferred)) {
Eif (!this.skip(graphUris, q.subject, options)) {
return true;
}
}
return false;
}
/**
* Get the sub properties of a given property or all root properties.
* @param subjectUri URI of a property or undefined to get all root properties.
* @param options Optional options for retrieving properties.
* @returns An array of sub properties of the given property, an empty array if the property has no sub properties.
*/
*getSubProperties(graphUris: string | string[] | undefined, subjectUri?: string, options?: DefinitionQueryOptions): IterableIterator<string> {
if (subjectUri) {
const yielded = new Set<string>();
const o = namedNode(subjectUri);
for (let q of this.store.matchAll(graphUris, null, rdfs.subPropertyOf, o, options?.includeInferred)) {
if (this.skip(graphUris, q.subject, options)) {
continue;
}
Eif (!yielded.has(q.subject.value)) {
yield q.subject.value;
}
yielded.add(q.subject.value);
}
} else {
yield* this.getRootProperties(graphUris, options);
}
}
/**
* Get all properties from the repository that have no super properties.
* @param options Optional options for retrieving properties.
* @returns An iterator of root properties in the repository.
*/
*getRootProperties(graphUris: string | string[] | undefined, options?: DefinitionQueryOptions): IterableIterator<string> {
const yielded = new Set<string>();
const properties = new Set<string>(this.getProperties(graphUris, options));
for (let p of properties) {
let hasSuperProperty = false;
for (let q of this.store.matchAll(graphUris, namedNode(p), rdfs.subPropertyOf, null, options?.includeInferred)) {
const includeReferenced = options?.includeReferenced ?? false;
const skip = this.skip(graphUris, q.object, options);
// Do not skip the super property if it is only referenced and the includeReferenced option is set.
if (q.object.termType != "NamedNode" || skip && (!includeReferenced || includeReferenced && this.hasSubject(graphUris, q.object.value))) {
continue;
}
// We have at least one super property that is not the property itself.
hasSuperProperty = q.object.value != q.subject.value;
// If we have a super property that is not in the list of properties and not excluded by the options, we add it to the result.
if (!properties.has(q.object.value) && !yielded.has(q.object.value)) {
yielded.add(q.object.value);
yield q.object.value;
}
break;
}
if (!hasSuperProperty && !yielded.has(p)) {
yielded.add(p);
yield p;
}
}
}
/**
* Indicate if there is an equivalent property of a given property.
* @param propertyUri URI of a property.
* @returns true if the property has an equivalent property, false otherwise.
*/
public hasEquivalentProperty(graphUris: string | string[] | undefined, propertyUri: string): boolean {
const s = namedNode(propertyUri);
// The OWL resoner will assert the equivalent class relationship in both directions.
for (let _ of this.store.matchAll(graphUris, s, owl.equivalentProperty, null)) {
return true;
}
return false;
}
/**
* Get the domain of a given property.
* @param propertyUri URI of a property.
* @returns The URI of the domain of the given property. If no domain is specified, rdfs:Resource is returned.
*/
public getDomain(graphUris: string | string[] | undefined, propertyUri: string): string {
const s = namedNode(propertyUri);
for (let q of this.store.matchAll(graphUris, s, this.domainPredicate, null)) {
return q.object.value;
}
return rdfs.Resource.value;
}
/**
* Get the range of a given property.
* @param propertyUri URI of a property.
* @returns The URI of the range of the given property. If no range is specified, `undefined` is returned.
*/
public getRange(graphUris: string | string[] | undefined, propertyUri: string): string | undefined {
const s = namedNode(propertyUri);
for (let q of this.store.matchAll(graphUris, s, this.rangePredicate, null)) {
return q.object.value;
}
return undefined;
}
/**
* Get all asserted and inferred property types.
* @param graphUris The URI of the graph or an array of graphs to search for property types.
* @param options Optional options for retrieving properties.
* @returns An iterator of all property types in the repository.
*/
*getPropertyTypes(graphUris: string | string[] | undefined, options?: DefinitionQueryOptions): IterableIterator<string> {
const yielded = new Set<string>();
for (let property of this.getProperties(graphUris, options)) {
const p = namedNode(property);
const types = new Set<string>(Array.from(this.store.matchAll(graphUris, p, rdf.type, null, false)).map(t => t.object.value));
if (types.size > 0) {
for (let t of types) {
// Do not assert rdf:Property for properties that have multiple types.
if ((t !== RDF.Property || types.size == 1) && !yielded.has(t)) {
yielded.add(t);
yield t;
}
}
} else {
// If there are no asserted types, we need to infer rdf:Property.
Eif (!yielded.has(RDF.Property)) {
yielded.add(RDF.Property);
yield RDF.Property;
}
}
}
}
} |