@comunica/actor-bindings-aggregator-factory-count/lib/ActorBindingsAggregatorFactoryCount.js

A count bindings aggregator factory actor

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ActorBindingsAggregatorFactoryCount = void 0;
const bus_bindings_aggregator_factory_1 = require("@comunica/bus-bindings-aggregator-factory");
const core_1 = require("@comunica/core");
const utils_algebra_1 = require("@comunica/utils-algebra");
const CountAggregator_1 = require("./CountAggregator");
/**
 * A comunica Count Expression Evaluator Aggregate Actor.
 */
class ActorBindingsAggregatorFactoryCount extends bus_bindings_aggregator_factory_1.ActorBindingsAggregatorFactory {
    constructor(args) {
        super(args);
    }
    async test(action) {
        if (action.expr.aggregator !== 'count' ||
            action.expr.expression.subType === utils_algebra_1.Algebra.ExpressionTypes.WILDCARD) {
            return (0, core_1.failTest)('This actor only supports the \'count\' aggregator without wildcard.');
        }
        return (0, core_1.passTestVoid)();
    }
    async run({ context, expr }) {
        return new CountAggregator_1.CountAggregator(await this.mediatorExpressionEvaluatorFactory.mediate({ algExpr: expr.expression, context }), expr.distinct);
    }
}
exports.ActorBindingsAggregatorFactoryCount = ActorBindingsAggregatorFactoryCount;
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