rdf-dataset-fragmenter/lib/strategy/FragmentationStrategyObject.js

Fragments an RDF dataset into multiple parts

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.FragmentationStrategyObject = void 0;
const FragmentationBlankNodeBuffer_1 = require("./FragmentationBlankNodeBuffer");
const FragmentationStrategyStreamAdapter_1 = require("./FragmentationStrategyStreamAdapter");
/**
 * A fragmentation strategy that places quads into their object's document.
 */
class FragmentationStrategyObject extends FragmentationStrategyStreamAdapter_1.FragmentationStrategyStreamAdapter {
    constructor(eagerFlushing = true) {
        super();
        this.blankNodeBuffer = new FragmentationBlankNodeBuffer_1.FragmentationBlankNodeBuffer('object', 'subject', eagerFlushing);
    }
    async handleQuad(quad, quadSink) {
        // Only accept IRI subjects.
        if (quad.object.termType === 'NamedNode') {
            // If the subject is a named node, add the quad to the subject's document.
            await quadSink.push(quad.object.value, quad);
            // Save the object in our blank node buffer, as it may be needed to identify documents for other quads.
            await this.blankNodeBuffer.materializeValueForNamedKey(quad.subject, quad.object, quadSink);
        }
        await this.blankNodeBuffer.push(quad, quadSink);
    }
    async flush(quadSink) {
        await super.flush(quadSink);
        await this.blankNodeBuffer.flush(quadSink);
    }
}
exports.FragmentationStrategyObject = FragmentationStrategyObject;
//# sourceMappingURL=FragmentationStrategyObject.js.map