class-transformer/decorators.js

"use strict";
var ClassTransformer_1 = require("./ClassTransformer");
var storage_1 = require("./storage");
var TypeMetadata_1 = require("./metadata/TypeMetadata");
var ExposeMetadata_1 = require("./metadata/ExposeMetadata");
var ExcludeMetadata_1 = require("./metadata/ExcludeMetadata");
var TransformMetadata_1 = require("./metadata/TransformMetadata");
/**
 * Defines a custom logic for value transformation.
 */
function Transform(transformFn, options) {
    return function (target, key) {
        var metadata = new TransformMetadata_1.TransformMetadata(target.constructor, key, transformFn, options);
        storage_1.defaultMetadataStorage.addTransformMetadata(metadata);
    };
}
exports.Transform = Transform;
/**
 * Specifies a type of the property.
 */
function Type(typeFunction) {
    return function (target, key) {
        var type = Reflect.getMetadata("design:type", target, key);
        var metadata = new TypeMetadata_1.TypeMetadata(target.constructor, key, type, typeFunction);
        storage_1.defaultMetadataStorage.addTypeMetadata(metadata);
    };
}
exports.Type = Type;
/**
 * Marks property as included in the process of transformation. By default it includes the property for both
 * constructorToPlain and plainToConstructor transformations, however you can specify on which of transformation types
 * you want to skip this property.
 */
function Expose(options) {
    return function (object, propertyName) {
        var metadata = new ExposeMetadata_1.ExposeMetadata(object instanceof Function ? object : object.constructor, propertyName, options || {});
        storage_1.defaultMetadataStorage.addExposeMetadata(metadata);
    };
}
exports.Expose = Expose;
/**
 * Marks property as excluded from the process of transformation. By default it excludes the property for both
 * constructorToPlain and plainToConstructor transformations, however you can specify on which of transformation types
 * you want to skip this property.
 */
function Exclude(options) {
    return function (object, propertyName) {
        var metadata = new ExcludeMetadata_1.ExcludeMetadata(object instanceof Function ? object : object.constructor, propertyName, options || {});
        storage_1.defaultMetadataStorage.addExcludeMetadata(metadata);
    };
}
exports.Exclude = Exclude;
/**
 * Transform the object from class to plain object and return only with the exposed properties.
 */
function TransformClassToPlain(params) {
    return function (target, propertyKey, descriptor) {
        var classTransformer = new ClassTransformer_1.ClassTransformer();
        var originalMethod = descriptor.value;
        descriptor.value = function () {
            var args = [];
            for (var _i = 0; _i < arguments.length; _i++) {
                args[_i - 0] = arguments[_i];
            }
            var result = originalMethod.apply(this, args);
            var isPromise = !!result && (typeof result === "object" || typeof result === "function") && typeof result.then === "function";
            return isPromise ? result.then(function (data) { return classTransformer.classToPlain(data, params); }) : classTransformer.classToPlain(result, params);
        };
    };
}
exports.TransformClassToPlain = TransformClassToPlain;
/**
 * Return the class instance only with the exposed properties.
 */
function TransformClassToClass(params) {
    return function (target, propertyKey, descriptor) {
        var classTransformer = new ClassTransformer_1.ClassTransformer();
        var originalMethod = descriptor.value;
        descriptor.value = function () {
            var args = [];
            for (var _i = 0; _i < arguments.length; _i++) {
                args[_i - 0] = arguments[_i];
            }
            var result = originalMethod.apply(this, args);
            var isPromise = !!result && (typeof result === "object" || typeof result === "function") && typeof result.then === "function";
            return isPromise ? result.then(function (data) { return classTransformer.classToClass(data, params); }) : classTransformer.classToClass(result, params);
        };
    };
}
exports.TransformClassToClass = TransformClassToClass;

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