giantdb/dist/middleware/transformable.js

Large object database in native JavaScript, with encryption support

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.MiddlewareTransformable = void 0;
/**
 * Represents a triple (stream, metadata, metadataChanged) that can be updated
 * with middleware results.
 */
class MiddlewareTransformable {
    stream;
    metadata;
    metadataChanged;
    constructor(stream, metadata) {
        this.stream = stream;
        this.metadata = metadata;
        this.metadataChanged = false;
    }
    /**
     * Update this object with the results from a middleware.
     *
     * If the results contain a reference to metadata, the metadataChanged
     * attribute will be set to true.
     *
     * @param result The results.
     */
    update(result) {
        if (result == null) {
            return;
        }
        this.stream = result.stream ?? this.stream;
        if (result.metadata != null) {
            this.metadata = result.metadata;
            this.metadataChanged = true;
        }
    }
}
exports.MiddlewareTransformable = MiddlewareTransformable;