ObjectContainer

ObjectContainer~ ObjectContainer

The Object Container is an enhanced dependency injector with support for aliases and constants, and allowing to reference classes in the application namespace by specifying their fully qualified names.

Constructor

new ObjectContainer(namespace)

Source:
Initializes the object container.
Parameters:
Name Type Description
namespace ima.Namespace The namespace container, used to access classes and values using their fully qualified names.

Members

(static) APP_BINDING_STATE

Source:
Returns constant for app binding state. When the object container is in app binding state, it is possible to register new aliases using the bind() method and register new constant using the constant() method, or override the default class dependencies of any already-configured class using the inject() method (classes that were not configured yet may be configured using the inject() method or provide() method).

(static) IMA_BINDING_STATE

Source:
Returns constant for IMA binding state. When the object container is in ima binding state, it is possible to register new aliases using the bind() method and register new constant using the constant() method, or override the default class dependencies of any already-configured class using the inject() method (classes that were not configured yet may be configured using the inject() method or provide() method).

(static) PLUGIN_BINDING_STATE

Source:
Returns constant for plugin binding state. When the object container is in plugin binding state, it is impossible to register new aliases using the bind() method and register new constant using the constant() method, or override the default class dependencies of any already-configured class using the inject() method (classes that were not configured yet may be configured using the inject() method or provide() method). This prevents the unpriviledged code (e.g. 3rd party plugins) from overriding the default dependency configuration provided by ima, or overriding the configuration of a 3rd party plugin by another 3rd party plugin. The application itself has always access to the unlocked object container.

(nullable) _bindingState :string

Source:
The current binding state. The setBindingState() method may be called for changing object container binding state only by the bootstrap script.
Type:
  • string

_entries :Map.<(string|function(new:*, ...*)|function(...*): *), Entry.<*>>

Source:
Type:
  • Map.<(string|function(new:*, ...*)|function(...*): *), Entry.<*>>

_namespace :ima.Namespace

Source:
The namespace container, used to access classes and values using their fully qualified names.
Type:
  • ima.Namespace

Methods

_createEntry(classConstructor, dependenciesopt, nullable, options) → {T}

Source:
Creates a new entry for the provided class or factory function, the provided dependencies and entry options.
Parameters:
Name Type Attributes Description
classConstructor function | function The class constructor or factory function.
dependencies Array.<*> <optional>
<nullable>
The dependencies to pass into the constructor or factory function.
options Object
Returns:
Created instance or generated value.
Type
T

_createInstanceFromEntry(entry, dependenciesopt) → {T}

Source:
Creates a new instance of the class or retrieves the value generated by the factory function represented by the provided entry, passing in the provided dependencies. The method uses the dependencies specified by the entry if no custom dependencies are provided.
Parameters:
Name Type Attributes Default Description
entry Entry.<T> The entry representing the class that should have its instance created or factory faction to use to create a value.
dependencies Array.<*> <optional>
[] The dependencies to pass into the constructor or factory function.
Returns:
Created instance or generated value.
Type
T

_getEntry(name) → (nullable) {Entry.<T>}

Source:
Retrieves the entry for the specified constant, alias, class or factory function, interface, or fully qualified namespace path (the method checks these in this order in case of a name clash). The method retrieves an existing entry even if a qualified namespace path is provided (if the target class or interface has been configured in this object container). The method throws an Error if no such constant, alias, registry, interface implementation is known to this object container and the provided identifier is not a valid namespace path specifying an existing class, interface or value.
Parameters:
Name Type Description
name string | function Name of a constant or alias, factory function, class or interface constructor, or a fully qualified namespace path.
Throws:
If no such constant, alias, registry, interface implementation is known to this object container.
Type
Error
Returns:
The retrieved entry.
Type
Entry.<T>

_getEntryFromClassConstructor(classConstructor) → (nullable) {Entry.<T>}

Source:
Retrieves the class denoted by the provided class constructor. The method then checks whether there are defined $dependecies property for class. Then the class is registered to this object container. The method returns the entry for the class if the specified class does not have defined $dependencies property return null.
Parameters:
Name Type Description
classConstructor function
Returns:
An entry representing the value at the specified classConstructor. The method returns null if the specified classConstructor does not have defined $dependencies.
Type
Entry.<T>

_getEntryFromConstant(compositionName) → (nullable) {Entry.<*>}

Source:
Retrieves the constant value denoted by the provided fully qualified composition name. The method returns the entry for the constant if the constant is registered with this object container, otherwise return null. Finally, if the constant composition name does not resolve to value, the method return null.
Parameters:
Name Type Description
compositionName string
Returns:
An entry representing the value at the specified composition name in the constants. The method returns null if the specified composition name does not exist in the constants.
Type
Entry.<*>

_getEntryFromNamespace(path) → (nullable) {Entry.<T>}

Source:
Retrieves the class denoted by the provided fully qualified name within the application namespace. The method then checks whether there are dependecies configured for the class, no matter whether the class is an implementation class or an "interface" class. The method returns the entry for the class if the class is registered with this object container, otherwise an unregistered entry is created and returned. Finally, if the namespace path does not resolve to a class, the method return an unregistered entry resolved to the value denoted by the namespace path. Alternatively, if a constructor function is passed in instead of a namespace path, the method returns null.
Parameters:
Name Type Description
path string | function Namespace path pointing to a class or a value in the application namespace, or a constructor function.
Returns:
An entry representing the value or class at the specified path in the namespace. The method returns null if the specified path does not exist in the namespace.
Type
Entry.<T>

_updateEntryValues(classConstructor, entry, dependencies)

Source:
The method update classConstructor and dependencies for defined entry. The entry throw Error for constants and if you try override dependencies more than once.
Parameters:
Name Type Description
classConstructor function | function The class constructor or factory function.
entry Entry The entry representing the class that should have its instance created or factory faction to use to create a value.
dependencies Array.<*> The dependencies to pass into the constructor or factory function.

bind(name, classConstructor, dependenciesopt, nullable) → {ObjectContainer}

Source:
Binds the specified class or factory function and dependencies to the specified alias. Binding a class or factory function to an alias allows the class or function to be specied as a dependency by specifying the alias and creating new instances by referring to the class or function by the alias. Also note that the same class or function may be bound to several aliases and each may use different dependencies. The alias will use the default dependencies bound for the class if no dependencies are provided.
Parameters:
Name Type Attributes Description
name string Alias name.
classConstructor function | function The class constructor or a factory function.
dependencies Array.<*> <optional>
<nullable>
The dependencies to pass into the constructor or factory function.
Returns:
This object container.
Type
ObjectContainer

clear() → {ObjectContainer}

Source:
Clears all entries from this object container and resets the locking mechanism of this object container.
Returns:
This object container.
Type
ObjectContainer

constant(name, value) → {ObjectContainer}

Source:
Defines a new constant registered with this object container. Note that this is the only way of passing string values to constructors because the object container treats strings as class, interface, alias or constant names.
Parameters:
Name Type Description
name string The constant name.
value * The constant value.
Returns:
This object container.
Type
ObjectContainer

create(name, dependenciesnullable) → {T}

Source:
Creates a new instance of the class or retrieves the value generated by the factory function identified by the provided name, class, interface, or factory function, passing in the provided dependencies. The method uses the dependencies specified when the class, interface or factory function has been registered with the object container if no custom dependencies are provided.
Parameters:
Name Type Attributes Description
name string | function | function The name of the alias, class, interface, or the class, interface or a factory function to use.
dependencies Array.<*> <nullable>
The dependencies to pass into the constructor or factory function.
Returns:
Created instance or generated value.
Type
T

get(name) → {T}

Source:
Retrieves the shared instance or value of the specified constant, alias, class or factory function, interface, or fully qualified namespace path (the method checks these in this order in case of a name clash). The instance or value is created lazily the first time it is requested.
Parameters:
Name Type Description
name string | function | function The name of the alias, class, interface, or the class, interface or a factory function.
Returns:
The shared instance or value.
Type
T

getConstructorOf(name) → {function}

Source:
Returns the class constructor function of the specified class.
Parameters:
Name Type Description
name string | function The name by which the class is registered with this object container.
Returns:
The constructor function.
Type
function

has(name) → {boolean}

Source:
Returns true if the specified object, class or resource is registered with this object container.
Parameters:
Name Type Description
name string | function The resource name.
Returns:
true if the specified object, class or resource is registered with this object container.
Type
boolean

inject(classConstructor, dependenciesnullable) → {ObjectContainer}

Source:
Configures the object loader with the specified default dependencies for the specified class. New instances of the class created by this object container will receive the provided dependencies into constructor unless custom dependencies are provided.
Parameters:
Name Type Attributes Description
classConstructor function The class constructor.
dependencies Array.<*> <nullable>
The dependencies to pass into the constructor function.
Returns:
This object container.
Type
ObjectContainer

provide(interfaceConstructor, implementationConstructor, dependenciesnullable) → {ObjectContainer}

Source:
Configures the default implementation of the specified interface to use when an implementation provider of the specified interface is requested from this object container. The implementation constructor will obtain the provided default dependencies or the dependencies provided to the create() method.
Parameters:
Name Type Attributes Description
interfaceConstructor function The constructor of the interface representing the service.
implementationConstructor function The constructor of the class implementing the service interface.
dependencies Array.<*> <nullable>
The dependencies to pass into the constructor function.
Returns:
This object container.
Type
ObjectContainer

setBindingState(bindingStatenullable)

Source:
Parameters:
Name Type Attributes Description
bindingState string <nullable>