@lightningkite/ktor-batteries/dist/db/Aggregate.js

"use strict";
// Package: com.lightningkite.ktordb
// Generated by Khrysalis - this file will be overwritten.
Object.defineProperty(exports, "__esModule", { value: true });
exports.xSequenceAggregate = exports.StandardDeviationPopulationAggregator = exports.StandardDeviationSampleAggregator = exports.AverageAggregator = exports.SumAggregator = exports.xAggregateAggregator = exports.Aggregate = void 0;
//! Declares com.lightningkite.ktordb.Aggregate
class Aggregate {
    constructor(name, jsonName) {
        this.name = name;
        this.jsonName = jsonName;
    }
    static values() { return Aggregate._values; }
    static valueOf(name) { return Aggregate[name]; }
    toString() { return this.name; }
    toJSON() { return this.jsonName; }
    static fromJSON(key) { return Aggregate._values.find(x => x.jsonName.toLowerCase() === key.toLowerCase()); }
}
exports.Aggregate = Aggregate;
Aggregate.Sum = new Aggregate("Sum", "Sum");
Aggregate.Average = new Aggregate("Average", "Average");
Aggregate.StandardDeviationSample = new Aggregate("StandardDeviationSample", "StandardDeviationSample");
Aggregate.StandardDeviationPopulation = new Aggregate("StandardDeviationPopulation", "StandardDeviationPopulation");
Aggregate._values = [Aggregate.Sum, Aggregate.Average, Aggregate.StandardDeviationSample, Aggregate.StandardDeviationPopulation];
//! Declares com.lightningkite.ktordb.aggregator>com.lightningkite.ktordb.Aggregate
function xAggregateAggregator(this_) {
    return (() => {
        switch (this_) {
            case Aggregate.Sum: {
                return new SumAggregator();
            }
            case Aggregate.Average: {
                return new AverageAggregator();
            }
            case Aggregate.StandardDeviationSample: {
                return new StandardDeviationSampleAggregator();
            }
            case Aggregate.StandardDeviationPopulation: {
                return new StandardDeviationPopulationAggregator();
            }
            default:
                throw new Error("Exhaustive when turned out to not be so exhaustive.");
        }
    })();
}
exports.xAggregateAggregator = xAggregateAggregator;
//! Declares com.lightningkite.ktordb.SumAggregator
class SumAggregator {
    constructor() {
        this.current = 0.0;
        this.anyFound = false;
    }
    consume(value) {
        this.anyFound = true;
        this.current = this.current + value;
    }
    complete() {
        return this.anyFound ? this.current : null;
    }
}
exports.SumAggregator = SumAggregator;
SumAggregator.implementsAggregator = true;
//! Declares com.lightningkite.ktordb.AverageAggregator
class AverageAggregator {
    constructor() {
        this.count = 0;
        this.current = 0.0;
    }
    consume(value) {
        this.count = this.count + 1;
        this.current = this.current + (value - this.current) / this.count;
    }
    complete() {
        return this.count === 0 ? null : this.current;
    }
}
exports.AverageAggregator = AverageAggregator;
AverageAggregator.implementsAggregator = true;
//! Declares com.lightningkite.ktordb.StandardDeviationSampleAggregator
class StandardDeviationSampleAggregator {
    constructor() {
        this.count = 0;
        this.mean = 0.0;
        this.m2 = 0.0;
    }
    consume(value) {
        this.count = this.count + 1;
        const delta1 = value - this.mean;
        this.mean = this.mean + (delta1) / this.count;
        const delta2 = value - this.mean;
        this.m2 = this.m2 + delta1 * delta2;
    }
    complete() {
        return this.count < 2 ? null : Math.sqrt(this.m2 / (this.count - 1));
    }
}
exports.StandardDeviationSampleAggregator = StandardDeviationSampleAggregator;
StandardDeviationSampleAggregator.implementsAggregator = true;
//! Declares com.lightningkite.ktordb.StandardDeviationPopulationAggregator
class StandardDeviationPopulationAggregator {
    constructor() {
        this.count = 0;
        this.mean = 0.0;
        this.m2 = 0.0;
    }
    consume(value) {
        this.count = this.count + 1;
        const delta1 = value - this.mean;
        this.mean = this.mean + (delta1) / this.count;
        const delta2 = value - this.mean;
        this.m2 = this.m2 + delta1 * delta2;
    }
    complete() {
        return this.count === 0 ? null : Math.sqrt(this.m2 / this.count);
    }
}
exports.StandardDeviationPopulationAggregator = StandardDeviationPopulationAggregator;
StandardDeviationPopulationAggregator.implementsAggregator = true;
//! Declares com.lightningkite.ktordb.aggregate>kotlin.sequences.Sequencekotlin.Double
function xSequenceAggregate(this_, aggregate) {
    const aggregator = xAggregateAggregator(aggregate);
    for (const item of this_) {
        aggregator.consume(item);
    }
    return aggregator.complete();
}
exports.xSequenceAggregate = xSequenceAggregate;
//# sourceMappingURL=Aggregate.js.map