annotations.js

export class Directive {
    constructor(name, options){
        this.name = name;
        this.options = options;
    }
}

export class Filter {
    constructor(name) {
        this.name = name;
    }
}

export class Inject {
    constructor(...deps){
        this.deps = [];
        for (let dep of deps) {
            this.deps = this.deps.concat(dep.replace(/\s+/g, '').split(','));
        }
    }
}

export class InjectAsProperty {
    constructor(name, propertyName = null) {
        this.name = name;
        this.propertyName = propertyName || name;
    }
}

/**
 * A annotation parser class which allows you to extract particular annotation type
 * of a class/function.
 *
 */
export class Parser {
    /**
     *
     * @param constructor the actual class or function
     */
    constructor(constructor) {
        this.constructor = constructor;
    }

    getAllAnnotations() {
        return this.annotations || (this.annotations = this.extractAnnotations(this.constructor));
    }

    getAnnotations(annotationConstructor) {
        var annotations = this.getAllAnnotations();
        var result = [];
        for (let annotation of annotations) {
            if (annotation instanceof annotationConstructor) {
                result.push(annotation);
            }
        }
        return result;
    }

    extractAnnotations(constructor) {
        var annotations = constructor.annotations || [];
        var parent = Object.getPrototypeOf(constructor);
        if ('function' === typeof parent) {
            annotations = annotations.concat(this.extractAnnotations(parent));
        }
        return annotations;
    }

}