@opennetwork/rdf-dataset/esnext/immutable-dataset.js

import { isQuad, DefaultDataFactory, isQuadLike } from "@opennetwork/rdf-data-model";
import { Dataset } from "./dataset.js";
import { ReadonlyDataset } from "./readonly-dataset.js";
export class ImmutableDataset extends Dataset {
    constructor(set = new Set()) {
        super(set);
        this.#set = set;
    }
    #set;
    add(value) {
        return this.addAll([value]);
    }
    addAll(dataset) {
        return new ImmutableDataset(this.constructSet(this.union(dataset)));
    }
    async import(dataset, eager) {
        const next = this.constructSet(this.#set);
        for await (const value of dataset) {
            next.add(isQuad(value) ? value : DefaultDataFactory.fromQuad(value));
        }
        return new ImmutableDataset(next);
    }
    delete(quad) {
        return new ImmutableDataset(this.constructSet(this.without(quad)));
    }
    replace(replacing, replacers) {
        const replacingDataset = new Set(new ReadonlyDataset().union((isQuad(replacing) || isQuadLike(replacing)) ? [replacing] : replacing).filter(quad => this.has(quad)));
        if (!replacingDataset.size) {
            // No changes, nothing to replace
            return this;
        }
        return new ImmutableDataset(this.constructSet(this
            .except(quad => replacingDataset.has(quad))
            .union((isQuad(replacers) || isQuadLike(replacers)) ? [replacers] : replacers)));
    }
    constructSet(initial) {
        if (this.#set.construct) {
            return this.#set.construct(initial);
        }
        else {
            return new Set(initial);
        }
    }
}
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