angular2
Version:
Angular 2 - a web framework for modern web apps
235 lines (234 loc) • 24.9 kB
JavaScript
import { ListWrapper } from 'angular2/src/facade/collection';
import { stringify, isBlank } from 'angular2/src/facade/lang';
import { BaseException, WrappedException } from 'angular2/src/facade/exceptions';
function findFirstClosedCycle(keys) {
var res = [];
for (var i = 0; i < keys.length; ++i) {
if (ListWrapper.contains(res, keys[i])) {
res.push(keys[i]);
return res;
}
else {
res.push(keys[i]);
}
}
return res;
}
function constructResolvingPath(keys) {
if (keys.length > 1) {
var reversed = findFirstClosedCycle(ListWrapper.reversed(keys));
var tokenStrs = reversed.map(k => stringify(k.token));
return " (" + tokenStrs.join(' -> ') + ")";
}
else {
return "";
}
}
/**
* Base class for all errors arising from misconfigured providers.
*/
export class AbstractProviderError extends BaseException {
constructor(injector, key, constructResolvingMessage) {
super("DI Exception");
this.keys = [key];
this.injectors = [injector];
this.constructResolvingMessage = constructResolvingMessage;
this.message = this.constructResolvingMessage(this.keys);
}
addKey(injector, key) {
this.injectors.push(injector);
this.keys.push(key);
this.message = this.constructResolvingMessage(this.keys);
}
get context() { return this.injectors[this.injectors.length - 1].debugContext(); }
}
/**
* Thrown when trying to retrieve a dependency by `Key` from {@link Injector}, but the
* {@link Injector} does not have a {@link Provider} for {@link Key}.
*
* ### Example ([live demo](http://plnkr.co/edit/vq8D3FRB9aGbnWJqtEPE?p=preview))
*
* ```typescript
* class A {
* constructor(b:B) {}
* }
*
* expect(() => Injector.resolveAndCreate([A])).toThrowError();
* ```
*/
export class NoProviderError extends AbstractProviderError {
constructor(injector, key) {
super(injector, key, function (keys) {
var first = stringify(ListWrapper.first(keys).token);
return `No provider for ${first}!${constructResolvingPath(keys)}`;
});
}
}
/**
* Thrown when dependencies form a cycle.
*
* ### Example ([live demo](http://plnkr.co/edit/wYQdNos0Tzql3ei1EV9j?p=info))
*
* ```typescript
* var injector = Injector.resolveAndCreate([
* provide("one", {useFactory: (two) => "two", deps: [[new Inject("two")]]}),
* provide("two", {useFactory: (one) => "one", deps: [[new Inject("one")]]})
* ]);
*
* expect(() => injector.get("one")).toThrowError();
* ```
*
* Retrieving `A` or `B` throws a `CyclicDependencyError` as the graph above cannot be constructed.
*/
export class CyclicDependencyError extends AbstractProviderError {
constructor(injector, key) {
super(injector, key, function (keys) {
return `Cannot instantiate cyclic dependency!${constructResolvingPath(keys)}`;
});
}
}
/**
* Thrown when a constructing type returns with an Error.
*
* The `InstantiationError` class contains the original error plus the dependency graph which caused
* this object to be instantiated.
*
* ### Example ([live demo](http://plnkr.co/edit/7aWYdcqTQsP0eNqEdUAf?p=preview))
*
* ```typescript
* class A {
* constructor() {
* throw new Error('message');
* }
* }
*
* var injector = Injector.resolveAndCreate([A]);
* try {
* injector.get(A);
* } catch (e) {
* expect(e instanceof InstantiationError).toBe(true);
* expect(e.originalException.message).toEqual("message");
* expect(e.originalStack).toBeDefined();
* }
* ```
*/
export class InstantiationError extends WrappedException {
constructor(injector, originalException, originalStack, key) {
super("DI Exception", originalException, originalStack, null);
this.keys = [key];
this.injectors = [injector];
}
addKey(injector, key) {
this.injectors.push(injector);
this.keys.push(key);
}
get wrapperMessage() {
var first = stringify(ListWrapper.first(this.keys).token);
return `Error during instantiation of ${first}!${constructResolvingPath(this.keys)}.`;
}
get causeKey() { return this.keys[0]; }
get context() { return this.injectors[this.injectors.length - 1].debugContext(); }
}
/**
* Thrown when an object other then {@link Provider} (or `Type`) is passed to {@link Injector}
* creation.
*
* ### Example ([live demo](http://plnkr.co/edit/YatCFbPAMCL0JSSQ4mvH?p=preview))
*
* ```typescript
* expect(() => Injector.resolveAndCreate(["not a type"])).toThrowError();
* ```
*/
export class InvalidProviderError extends BaseException {
constructor(provider) {
super("Invalid provider - only instances of Provider and Type are allowed, got: " +
provider.toString());
}
}
/**
* Thrown when the class has no annotation information.
*
* Lack of annotation information prevents the {@link Injector} from determining which dependencies
* need to be injected into the constructor.
*
* ### Example ([live demo](http://plnkr.co/edit/rHnZtlNS7vJOPQ6pcVkm?p=preview))
*
* ```typescript
* class A {
* constructor(b) {}
* }
*
* expect(() => Injector.resolveAndCreate([A])).toThrowError();
* ```
*
* This error is also thrown when the class not marked with {@link Injectable} has parameter types.
*
* ```typescript
* class B {}
*
* class A {
* constructor(b:B) {} // no information about the parameter types of A is available at runtime.
* }
*
* expect(() => Injector.resolveAndCreate([A,B])).toThrowError();
* ```
*/
export class NoAnnotationError extends BaseException {
constructor(typeOrFunc, params) {
super(NoAnnotationError._genMessage(typeOrFunc, params));
}
static _genMessage(typeOrFunc, params) {
var signature = [];
for (var i = 0, ii = params.length; i < ii; i++) {
var parameter = params[i];
if (isBlank(parameter) || parameter.length == 0) {
signature.push('?');
}
else {
signature.push(parameter.map(stringify).join(' '));
}
}
return "Cannot resolve all parameters for '" + stringify(typeOrFunc) + "'(" +
signature.join(', ') + "). " +
"Make sure that all the parameters are decorated with Inject or have valid type annotations and that '" +
stringify(typeOrFunc) + "' is decorated with Injectable.";
}
}
/**
* Thrown when getting an object by index.
*
* ### Example ([live demo](http://plnkr.co/edit/bRs0SX2OTQiJzqvjgl8P?p=preview))
*
* ```typescript
* class A {}
*
* var injector = Injector.resolveAndCreate([A]);
*
* expect(() => injector.getAt(100)).toThrowError();
* ```
*/
export class OutOfBoundsError extends BaseException {
constructor(index) {
super(`Index ${index} is out-of-bounds.`);
}
}
// TODO: add a working example after alpha38 is released
/**
* Thrown when a multi provider and a regular provider are bound to the same token.
*
* ### Example
*
* ```typescript
* expect(() => Injector.resolveAndCreate([
* new Provider("Strings", {useValue: "string1", multi: true}),
* new Provider("Strings", {useValue: "string2", multi: false})
* ])).toThrowError();
* ```
*/
export class MixingMultiProvidersWithRegularProvidersError extends BaseException {
constructor(provider1, provider2) {
super("Cannot mix multi providers and regular providers, got: " + provider1.toString() + " " +
provider2.toString());
}
}
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i < keys.length; ++i) {\n    if (ListWrapper.contains(res, keys[i])) {\n      res.push(keys[i]);\n      return res;\n    } else {\n      res.push(keys[i]);\n    }\n  }\n  return res;\n}\n\nfunction constructResolvingPath(keys: any[]): string {\n  if (keys.length > 1) {\n    var reversed = findFirstClosedCycle(ListWrapper.reversed(keys));\n    var tokenStrs = reversed.map(k => stringify(k.token));\n    return \" (\" + tokenStrs.join(' -> ') + \")\";\n  } else {\n    return \"\";\n  }\n}\n\n\n/**\n * Base class for all errors arising from misconfigured providers.\n */\nexport class AbstractProviderError extends BaseException {\n  /** @internal */\n  message: string;\n\n  /** @internal */\n  keys: ReflectiveKey[];\n\n  /** @internal */\n  injectors: ReflectiveInjector[];\n\n  /** @internal */\n  constructResolvingMessage: Function;\n\n  constructor(injector: ReflectiveInjector, key: ReflectiveKey,\n              constructResolvingMessage: Function) {\n    super(\"DI Exception\");\n    this.keys = [key];\n    this.injectors = [injector];\n    this.constructResolvingMessage = constructResolvingMessage;\n    this.message = this.constructResolvingMessage(this.keys);\n  }\n\n  addKey(injector: ReflectiveInjector, key: ReflectiveKey): void {\n    this.injectors.push(injector);\n    this.keys.push(key);\n    this.message = this.constructResolvingMessage(this.keys);\n  }\n\n  get context() { return this.injectors[this.injectors.length - 1].debugContext(); }\n}\n\n/**\n * Thrown when trying to retrieve a dependency by `Key` from {@link Injector}, but the\n * {@link Injector} does not have a {@link Provider} for {@link Key}.\n *\n * ### Example ([live demo](http://plnkr.co/edit/vq8D3FRB9aGbnWJqtEPE?p=preview))\n *\n * ```typescript\n * class A {\n *   constructor(b:B) {}\n * }\n *\n * expect(() => Injector.resolveAndCreate([A])).toThrowError();\n * ```\n */\nexport class NoProviderError extends AbstractProviderError {\n  constructor(injector: ReflectiveInjector, key: ReflectiveKey) {\n    super(injector, key, function(keys: any[]) {\n      var first = stringify(ListWrapper.first(keys).token);\n      return `No provider for ${first}!${constructResolvingPath(keys)}`;\n    });\n  }\n}\n\n/**\n * Thrown when dependencies form a cycle.\n *\n * ### Example ([live demo](http://plnkr.co/edit/wYQdNos0Tzql3ei1EV9j?p=info))\n *\n * ```typescript\n * var injector = Injector.resolveAndCreate([\n *   provide(\"one\", {useFactory: (two) => \"two\", deps: [[new Inject(\"two\")]]}),\n *   provide(\"two\", {useFactory: (one) => \"one\", deps: [[new Inject(\"one\")]]})\n * ]);\n *\n * expect(() => injector.get(\"one\")).toThrowError();\n * ```\n *\n * Retrieving `A` or `B` throws a `CyclicDependencyError` as the graph above cannot be constructed.\n */\nexport class CyclicDependencyError extends AbstractProviderError {\n  constructor(injector: ReflectiveInjector, key: ReflectiveKey) {\n    super(injector, key, function(keys: any[]) {\n      return `Cannot instantiate cyclic dependency!${constructResolvingPath(keys)}`;\n    });\n  }\n}\n\n/**\n * Thrown when a constructing type returns with an Error.\n *\n * The `InstantiationError` class contains the original error plus the dependency graph which caused\n * this object to be instantiated.\n *\n * ### Example ([live demo](http://plnkr.co/edit/7aWYdcqTQsP0eNqEdUAf?p=preview))\n *\n * ```typescript\n * class A {\n *   constructor() {\n *     throw new Error('message');\n *   }\n * }\n *\n * var injector = Injector.resolveAndCreate([A]);\n\n * try {\n *   injector.get(A);\n * } catch (e) {\n *   expect(e instanceof InstantiationError).toBe(true);\n *   expect(e.originalException.message).toEqual(\"message\");\n *   expect(e.originalStack).toBeDefined();\n * }\n * ```\n */\nexport class InstantiationError extends WrappedException {\n  /** @internal */\n  keys: ReflectiveKey[];\n\n  /** @internal */\n  injectors: ReflectiveInjector[];\n\n  constructor(injector: ReflectiveInjector, originalException, originalStack, key: ReflectiveKey) {\n    super(\"DI Exception\", originalException, originalStack, null);\n    this.keys = [key];\n    this.injectors = [injector];\n  }\n\n  addKey(injector: ReflectiveInjector, key: ReflectiveKey): void {\n    this.injectors.push(injector);\n    this.keys.push(key);\n  }\n\n  get wrapperMessage(): string {\n    var first = stringify(ListWrapper.first(this.keys).token);\n    return `Error during instantiation of ${first}!${constructResolvingPath(this.keys)}.`;\n  }\n\n  get causeKey(): ReflectiveKey { return this.keys[0]; }\n\n  get context() { return this.injectors[this.injectors.length - 1].debugContext(); }\n}\n\n/**\n * Thrown when an object other then {@link Provider} (or `Type`) is passed to {@link Injector}\n * creation.\n *\n * ### Example ([live demo](http://plnkr.co/edit/YatCFbPAMCL0JSSQ4mvH?p=preview))\n *\n * ```typescript\n * expect(() => Injector.resolveAndCreate([\"not a type\"])).toThrowError();\n * ```\n */\nexport class InvalidProviderError extends BaseException {\n  constructor(provider) {\n    super(\"Invalid provider - only instances of Provider and Type are allowed, got: \" +\n          provider.toString());\n  }\n}\n\n/**\n * Thrown when the class has no annotation information.\n *\n * Lack of annotation information prevents the {@link Injector} from determining which dependencies\n * need to be injected into the constructor.\n *\n * ### Example ([live demo](http://plnkr.co/edit/rHnZtlNS7vJOPQ6pcVkm?p=preview))\n *\n * ```typescript\n * class A {\n *   constructor(b) {}\n * }\n *\n * expect(() => Injector.resolveAndCreate([A])).toThrowError();\n * ```\n *\n * This error is also thrown when the class not marked with {@link Injectable} has parameter types.\n *\n * ```typescript\n * class B {}\n *\n * class A {\n *   constructor(b:B) {} // no information about the parameter types of A is available at runtime.\n * }\n *\n * expect(() => Injector.resolveAndCreate([A,B])).toThrowError();\n * ```\n */\nexport class NoAnnotationError extends BaseException {\n  constructor(typeOrFunc, params: any[][]) {\n    super(NoAnnotationError._genMessage(typeOrFunc, params));\n  }\n\n  private static _genMessage(typeOrFunc, params: any[][]) {\n    var signature = [];\n    for (var i = 0, ii = params.length; i < ii; i++) {\n      var parameter = params[i];\n      if (isBlank(parameter) || parameter.length == 0) {\n        signature.push('?');\n      } else {\n        signature.push(parameter.map(stringify).join(' '));\n      }\n    }\n    return \"Cannot resolve all parameters for '\" + stringify(typeOrFunc) + \"'(\" +\n           signature.join(', ') + \"). \" +\n           \"Make sure that all the parameters are decorated with Inject or have valid type annotations and that '\" +\n           stringify(typeOrFunc) + \"' is decorated with Injectable.\";\n  }\n}\n\n/**\n * Thrown when getting an object by index.\n *\n * ### Example ([live demo](http://plnkr.co/edit/bRs0SX2OTQiJzqvjgl8P?p=preview))\n *\n * ```typescript\n * class A {}\n *\n * var injector = Injector.resolveAndCreate([A]);\n *\n * expect(() => injector.getAt(100)).toThrowError();\n * ```\n */\nexport class OutOfBoundsError extends BaseException {\n  constructor(index) { super(`Index ${index} is out-of-bounds.`); }\n}\n\n// TODO: add a working example after alpha38 is released\n/**\n * Thrown when a multi provider and a regular provider are bound to the same token.\n *\n * ### Example\n *\n * ```typescript\n * expect(() => Injector.resolveAndCreate([\n *   new Provider(\"Strings\", {useValue: \"string1\", multi: true}),\n *   new Provider(\"Strings\", {useValue: \"string2\", multi: false})\n * ])).toThrowError();\n * ```\n */\nexport class MixingMultiProvidersWithRegularProvidersError extends BaseException {\n  constructor(provider1, provider2) {\n    super(\"Cannot mix multi providers and regular providers, got: \" + provider1.toString() + \" \" +\n          provider2.toString());\n  }\n}\n"]}