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| System.register(['core-js', 'aurelia-metadata', 'aurelia-logging', './metadata'], function (_export) {
'use strict';
var core, Metadata, AggregateError, Resolver, ClassActivator, emptyParameters, Container;
function _classCallCheck(instance, Constructor) { Iif (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
// Fix Function#name on browsers that do not support it (IE):
function test() {}
return {
setters: [function (_coreJs) {
core = _coreJs['default'];
}, function (_aureliaMetadata) {
Metadata = _aureliaMetadata.Metadata;
}, function (_aureliaLogging) {
AggregateError = _aureliaLogging.AggregateError;
}, function (_metadata) {
Resolver = _metadata.Resolver;
ClassActivator = _metadata.ClassActivator;
}],
execute: function () {
Metadata.registration = 'aurelia:registration';
Metadata.instanceActivator = 'aurelia:instance-activator';Iif (!test.name) {
Object.defineProperty(Function.prototype, 'name', {
get: function get() {
var name = this.toString().match(/^\s*function\s*(\S*)\s*\(/)[1];
// For better performance only parse once, and then cache the
// result through a new accessor for repeated access.
Object.defineProperty(this, 'name', { value: name });
return name;
}
});
}
emptyParameters = Object.freeze([]);
_export('emptyParameters', emptyParameters);
/**
* A lightweight, extensible dependency injection container.
*
* @class Container
* @constructor
*/
Container = (function () {
function Container(constructionInfo) {
_classCallCheck(this, Container);
this.constructionInfo = constructionInfo || new Map();
this.entries = new Map();
this.root = this;
}
/**
* Adds an additional location to search for constructor parameter type info.
*
* @method addParameterInfoLocator
* @param {Function} locator Configures a locator function to use when searching for parameter info. It should return undefined if no parameter info is found.
*/
Container.prototype.addParameterInfoLocator = function addParameterInfoLocator(locator) {
if (this.locateParameterInfoElsewhere === undefined) {
this.locateParameterInfoElsewhere = locator;
return;
}
var original = this.locateParameterInfoElsewhere;
this.locateParameterInfoElsewhere = function (fn) {
return original(fn) || locator(fn);
};
};
/**
* Registers an existing object instance with the container.
*
* @method registerInstance
* @param {Object} key The key that identifies the dependency at resolution time; usually a constructor function.
* @param {Object} instance The instance that will be resolved when the key is matched.
*/
Container.prototype.registerInstance = function registerInstance(key, instance) {
this.registerHandler(key, function (x) {
return instance;
});
};
/**
* Registers a type (constructor function) such that the container returns a new instance for each request.
*
* @method registerTransient
* @param {Object} key The key that identifies the dependency at resolution time; usually a constructor function.
* @param {Function} [fn] The constructor function to use when the dependency needs to be instantiated.
*/
Container.prototype.registerTransient = function registerTransient(key, fn) {
fn = fn || key;
this.registerHandler(key, function (x) {
return x.invoke(fn);
});
};
/**
* Registers a type (constructor function) such that the container always returns the same instance for each request.
*
* @method registerSingleton
* @param {Object} key The key that identifies the dependency at resolution time; usually a constructor function.
* @param {Function} [fn] The constructor function to use when the dependency needs to be instantiated.
*/
Container.prototype.registerSingleton = function registerSingleton(key, fn) {
var singleton = null;
fn = fn || key;
this.registerHandler(key, function (x) {
return singleton || (singleton = x.invoke(fn));
});
};
/**
* Registers a type (constructor function) by inspecting its registration annotations. If none are found, then the default singleton registration is used.
*
* @method autoRegister
* @param {Function} fn The constructor function to use when the dependency needs to be instantiated.
* @param {Object} [key] The key that identifies the dependency at resolution time; usually a constructor function.
*/
Container.prototype.autoRegister = function autoRegister(fn, key) {
var registration;
if (fn === null || fn === undefined) {
throw new Error('fn cannot be null or undefined.');
}
if (typeof fn === 'function') {
registration = Metadata.get(Metadata.registration, fn);
if (registration !== undefined) {
registration.register(this, key || fn, fn);
} else {
this.registerSingleton(key || fn, fn);
}
} else {
this.registerInstance(fn, fn);
}
};
/**
* Registers an array of types (constructor functions) by inspecting their registration annotations. If none are found, then the default singleton registration is used.
*
* @method autoRegisterAll
* @param {Function[]} fns The constructor function to use when the dependency needs to be instantiated.
*/
Container.prototype.autoRegisterAll = function autoRegisterAll(fns) {
var i = fns.length;
while (i--) {
this.autoRegister(fns[i]);
}
};
/**
* Registers a custom resolution function such that the container calls this function for each request to obtain the instance.
*
* @method registerHandler
* @param {Object} key The key that identifies the dependency at resolution time; usually a constructor function.
* @param {Function} handler The resolution function to use when the dependency is needed. It will be passed one arguement, the container instance that is invoking it.
*/
Container.prototype.registerHandler = function registerHandler(key, handler) {
this.getOrCreateEntry(key).push(handler);
};
/**
* Unregisters based on key.
*
* @method unregister
* @param {Object} key The key that identifies the dependency at resolution time; usually a constructor function.
*/
Container.prototype.unregister = function unregister(key) {
this.entries['delete'](key);
};
/**
* Resolves a single instance based on the provided key.
*
* @method get
* @param {Object} key The key that identifies the object to resolve.
* @return {Object} Returns the resolved instance.
*/
Container.prototype.get = function get(key) {
var entry;
if (key === null || key === undefined) {
throw new Error('key cannot be null or undefined.');
}
Iif (key === Container) {
return this;
}
if (key instanceof Resolver) {
return key.get(this);
}
entry = this.entries.get(key);
if (entry !== undefined) {
return entry[0](this);
}
if (this.parent) {
return this.parent.get(key);
}
this.autoRegister(key);
entry = this.entries.get(key);
return entry[0](this);
};
/**
* Resolves all instance registered under the provided key.
*
* @method getAll
* @param {Object} key The key that identifies the objects to resolve.
* @return {Object[]} Returns an array of the resolved instances.
*/
Container.prototype.getAll = function getAll(key) {
var _this = this;
var entry;
Iif (key === null || key === undefined) {
throw new Error('key cannot be null or undefined.');
}
entry = this.entries.get(key);
Eif (entry !== undefined) {
return entry.map(function (x) {
return x(_this);
});
}
if (this.parent) {
return this.parent.getAll(key);
}
return [];
};
/**
* Inspects the container to determine if a particular key has been registred.
*
* @method hasHandler
* @param {Object} key The key that identifies the dependency at resolution time; usually a constructor function.
* @param {Boolean} [checkParent=false] Indicates whether or not to check the parent container hierarchy.
* @return {Boolean} Returns true if the key has been registred; false otherwise.
*/
Container.prototype.hasHandler = function hasHandler(key) {
var checkParent = arguments[1] === undefined ? false : arguments[1];
if (key === null || key === undefined) {
throw new Error('key cannot be null or undefined.');
}
return this.entries.has(key) || checkParent && this.parent && this.parent.hasHandler(key, checkParent);
};
/**
* Creates a new dependency injection container whose parent is the current container.
*
* @method createChild
* @return {Container} Returns a new container instance parented to this.
*/
Container.prototype.createChild = function createChild() {
var childContainer = new Container(this.constructionInfo);
childContainer.parent = this;
childContainer.root = this.root;
childContainer.locateParameterInfoElsewhere = this.locateParameterInfoElsewhere;
return childContainer;
};
/**
* Invokes a function, recursively resolving its dependencies.
*
* @method invoke
* @param {Function} fn The function to invoke with the auto-resolved dependencies.
* @return {Object} Returns the instance resulting from calling the function.
*/
Container.prototype.invoke = function invoke(fn) {
try {
var info = this.getOrCreateConstructionInfo(fn),
keys = info.keys,
args = new Array(keys.length),
i,
ii;
for (i = 0, ii = keys.length; i < ii; ++i) {
args[i] = this.get(keys[i]);
}
return info.activator.invoke(fn, args);
} catch (e) {
var activatingText = info.activator instanceof ClassActivator ? 'instantiating' : 'invoking';
var message = 'Error ' + activatingText + ' ' + fn.name + '.';
if (i < ii) {
message += ' The argument at index ' + i + ' (key:' + keys[i] + ') could not be satisfied.';
}
message += ' Check the inner error for details.';
throw AggregateError(message, e, true);
}
};
Container.prototype.getOrCreateEntry = function getOrCreateEntry(key) {
var entry;
if (key === null || key === undefined) {
throw new Error('key cannot be null or undefined.');
}
entry = this.entries.get(key);
if (entry === undefined) {
entry = [];
this.entries.set(key, entry);
}
return entry;
};
Container.prototype.getOrCreateConstructionInfo = function getOrCreateConstructionInfo(fn) {
var info = this.constructionInfo.get(fn);
if (info === undefined) {
info = this.createConstructionInfo(fn);
this.constructionInfo.set(fn, info);
}
return info;
};
Container.prototype.createConstructionInfo = function createConstructionInfo(fn) {
var info = { activator: Metadata.getOwn(Metadata.instanceActivator, fn) || ClassActivator.instance };
if (fn.inject !== undefined) {
if (typeof fn.inject === 'function') {
info.keys = fn.inject();
} else {
info.keys = fn.inject;
}
return info;
}
Iif (this.locateParameterInfoElsewhere !== undefined) {
info.keys = this.locateParameterInfoElsewhere(fn) || Reflect.getOwnMetadata(Metadata.paramTypes, fn) || emptyParameters;
} else {
info.keys = Reflect.getOwnMetadata(Metadata.paramTypes, fn) || emptyParameters;
}
return info;
};
return Container;
})();
_export('Container', Container);
}
};
});
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