@itrocks/reflect/esm/property.js

Runtime introspection of TypeScript classes and their properties, including property type

import { CollectionType } from '@itrocks/property-type';
import { ReflectClass } from './class.js';
export class ReflectProperty {
    #class;
    name;
    constructor(object, name) {
        this.#class = object;
        this.name = name;
    }
    get class() {
        const value = (this.#class instanceof ReflectClass)
            ? this.#class
            : new ReflectClass(this.#class);
        Object.defineProperty(this, 'class', { configurable: true, enumerable: false, value, writable: true });
        return value;
    }
    get collectionType() {
        const value = this.class.propertyTypes[this.name];
        if (!(value instanceof CollectionType)) {
            throw 'ReflectProperty.collectionType is meant to be used exclusively on collection properties';
        }
        Object.defineProperty(this, 'collectionType', { configurable: true, enumerable: false, value, writable: true });
        return value;
    }
    get defaultValue() {
        const value = this.class.propertyDefaults[this.name];
        Object.defineProperty(this, 'defaultValue', { configurable: true, enumerable: false, value, writable: true });
        return value;
    }
    get object() {
        const value = this.class.object;
        Object.defineProperty(this, 'object', { configurable: true, enumerable: false, value, writable: true });
        return value;
    }
    get type() {
        const value = this.class.propertyTypes[this.name];
        Object.defineProperty(this, 'type', { configurable: true, enumerable: false, value, writable: true });
        return value;
    }
    get value() {
        return this.object ? this.object[this.name] : undefined;
    }
}
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