angular2
Version:
Angular 2 - a web framework for modern web apps
148 lines (147 loc) • 7.39 kB
JavaScript
import { isPresent, isFunction, global, stringify } from 'angular2/src/facade/lang';
import { BaseException } from 'angular2/src/facade/exceptions';
export class ReflectionCapabilities {
constructor(reflect) {
this._reflect = isPresent(reflect) ? reflect : global.Reflect;
}
isReflectionEnabled() { return true; }
factory(t) {
switch (t.length) {
case 0:
return () => new t();
case 1:
return (a1) => new t(a1);
case 2:
return (a1, a2) => new t(a1, a2);
case 3:
return (a1, a2, a3) => new t(a1, a2, a3);
case 4:
return (a1, a2, a3, a4) => new t(a1, a2, a3, a4);
case 5:
return (a1, a2, a3, a4, a5) => new t(a1, a2, a3, a4, a5);
case 6:
return (a1, a2, a3, a4, a5, a6) => new t(a1, a2, a3, a4, a5, a6);
case 7:
return (a1, a2, a3, a4, a5, a6, a7) => new t(a1, a2, a3, a4, a5, a6, a7);
case 8:
return (a1, a2, a3, a4, a5, a6, a7, a8) => new t(a1, a2, a3, a4, a5, a6, a7, a8);
case 9:
return (a1, a2, a3, a4, a5, a6, a7, a8, a9) => new t(a1, a2, a3, a4, a5, a6, a7, a8, a9);
case 10:
return (a1, a2, a3, a4, a5, a6, a7, a8, a9, a10) => new t(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10);
case 11:
return (a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11) => new t(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11);
case 12:
return (a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12) => new t(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12);
case 13:
return (a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13) => new t(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13);
case 14:
return (a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14) => new t(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14);
case 15:
return (a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15) => new t(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15);
case 16:
return (a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16) => new t(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16);
case 17:
return (a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17) => new t(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17);
case 18:
return (a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18) => new t(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18);
case 19:
return (a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19) => new t(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19);
case 20:
return (a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20) => new t(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
}
;
throw new Error(`Cannot create a factory for '${stringify(t)}' because its constructor has more than 20 arguments`);
}
/** @internal */
_zipTypesAndAnnotations(paramTypes, paramAnnotations) {
var result;
if (typeof paramTypes === 'undefined') {
result = new Array(paramAnnotations.length);
}
else {
result = new Array(paramTypes.length);
}
for (var i = 0; i < result.length; i++) {
// TS outputs Object for parameters without types, while Traceur omits
// the annotations. For now we preserve the Traceur behavior to aid
// migration, but this can be revisited.
if (typeof paramTypes === 'undefined') {
result[i] = [];
}
else if (paramTypes[i] != Object) {
result[i] = [paramTypes[i]];
}
else {
result[i] = [];
}
if (isPresent(paramAnnotations) && isPresent(paramAnnotations[i])) {
result[i] = result[i].concat(paramAnnotations[i]);
}
}
return result;
}
parameters(typeOrFunc) {
// Prefer the direct API.
if (isPresent(typeOrFunc.parameters)) {
return typeOrFunc.parameters;
}
if (isPresent(this._reflect) && isPresent(this._reflect.getMetadata)) {
var paramAnnotations = this._reflect.getMetadata('parameters', typeOrFunc);
var paramTypes = this._reflect.getMetadata('design:paramtypes', typeOrFunc);
if (isPresent(paramTypes) || isPresent(paramAnnotations)) {
return this._zipTypesAndAnnotations(paramTypes, paramAnnotations);
}
}
// The array has to be filled with `undefined` because holes would be skipped by `some`
let parameters = new Array(typeOrFunc.length);
parameters.fill(undefined);
return parameters;
}
annotations(typeOrFunc) {
// Prefer the direct API.
if (isPresent(typeOrFunc.annotations)) {
var annotations = typeOrFunc.annotations;
if (isFunction(annotations) && annotations.annotations) {
annotations = annotations.annotations;
}
return annotations;
}
if (isPresent(this._reflect) && isPresent(this._reflect.getMetadata)) {
var annotations = this._reflect.getMetadata('annotations', typeOrFunc);
if (isPresent(annotations))
return annotations;
}
return [];
}
propMetadata(typeOrFunc) {
// Prefer the direct API.
if (isPresent(typeOrFunc.propMetadata)) {
var propMetadata = typeOrFunc.propMetadata;
if (isFunction(propMetadata) && propMetadata.propMetadata) {
propMetadata = propMetadata.propMetadata;
}
return propMetadata;
}
if (isPresent(this._reflect) && isPresent(this._reflect.getMetadata)) {
var propMetadata = this._reflect.getMetadata('propMetadata', typeOrFunc);
if (isPresent(propMetadata))
return propMetadata;
}
return {};
}
interfaces(type) {
throw new BaseException("JavaScript does not support interfaces");
}
getter(name) { return new Function('o', 'return o.' + name + ';'); }
setter(name) {
return new Function('o', 'v', 'return o.' + name + ' = v;');
}
method(name) {
let functionBody = `if (!o.${name}) throw new Error('"${name}" is undefined');
return o.${name}.apply(o, args);`;
return new Function('o', 'args', functionBody);
}
// There is not a concept of import uri in Js, but this is useful in developing Dart applications.
importUri(type) { return `./${stringify(type)}`; }
}