Class: ObjectContainer
@ima/core.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.
Constructors
constructor
• new ObjectContainer(namespace)
Initializes the object container.
Parameters
| Name | Type | Description |
|---|---|---|
namespace | Namespace | The namespace container, used to access classes and values using their fully qualified names. |
Defined in
packages/core/src/oc/ObjectContainer.ts:90
Properties
_bindingPlugin
• Private Optional _bindingPlugin: string
The current plugin binding to OC.
The () method may be called for changing object container binding state only by the bootstrap script.
Defined in
packages/core/src/oc/ObjectContainer.ts:75
_bindingState
• Private Optional _bindingState: BindingState
The current binding state.
The () method may be called for changing object container binding state only by the bootstrap script.
Defined in
packages/core/src/oc/ObjectContainer.ts:67
_entries
• Private _entries: Map<Dependency<any>, Entry<any>>
Defined in
packages/core/src/oc/ObjectContainer.ts:76
_namespace
• Private _namespace: Namespace
The namespace container, used to access classes and values using their fully qualified names.
Defined in
packages/core/src/oc/ObjectContainer.ts:82
Methods
#getDebugName
▸ Private #getDebugName(name): string
Formats name, function, class constructor to more compact name/message to allow for cleaner debug Error messages.
Parameters
| Name | Type |
|---|---|
name | any |
Returns
string
Defined in
packages/core/src/oc/ObjectContainer.ts:873
_createEntry
▸ _createEntry<T>(classConstructor, dependencies?, options?): Entry<T>
Creates a new entry for the provided class or factory function, the provided dependencies and entry options.
Type parameters
| Name |
|---|
T |
Parameters
| Name | Type | Description |
|---|---|---|
classConstructor | EntryConstructor<T> | The class constructor or factory function. |
dependencies? | any[] | The dependencies to pass into the constructor or factory function. |
options? | EntryOptions | - |
Returns
Entry<T>
Created instance or generated value.
Defined in
packages/core/src/oc/ObjectContainer.ts:646
_createInstanceFromEntry
▸ _createInstanceFromEntry<T, E>(entry, dependencies?): T
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.
Type parameters
| Name | Type |
|---|---|
T | T |
E | extends Entry<T, E> |
Parameters
| Name | Type | Default value | Description |
|---|---|---|---|
entry | E | undefined | The entry representing the class that should have its instance created or factory faction to use to create a value. |
dependencies | any[] | [] | The dependencies to pass into the constructor or factory function. |
Returns
T
Created instance or generated value.
Defined in
packages/core/src/oc/ObjectContainer.ts:685
_getEntry
▸ _getEntry<T>(name): null | Entry<T>
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.
Throws
If no such constant, alias, registry, interface implementation is known to this object container.
Type parameters
| Name |
|---|
T |
Parameters
| Name | Type | Description |
|---|---|---|
name | Dependency<T> | Name of a constant or alias, factory function, class or interface constructor, or a fully qualified namespace path. |
Returns
null | Entry<T>
The retrieved entry.
Defined in
packages/core/src/oc/ObjectContainer.ts:535
_getEntryFromClassConstructor
▸ _getEntryFromClassConstructor<T>(classConstructor): null | Entry<T>
Retrieves the class denoted by the provided class constructor.
The method then checks whether there are defined $dependencies
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.
Type parameters
| Name |
|---|
T |
Parameters
| Name | Type |
|---|---|
classConstructor | OCInjectable<T> |
Returns
null | Entry<T>
An entry representing the value at the specified
classConstructor. The method returns null
if the specified classConstructor does not have defined
$dependencies.
Defined in
packages/core/src/oc/ObjectContainer.ts:840
_getEntryFromConstant
▸ _getEntryFromConstant<T>(compositionName): null | Entry<() => T>
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.
Type parameters
| Name |
|---|
T |
Parameters
| Name | Type |
|---|---|
compositionName | string |
Returns
null | Entry<() => T>
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.
Defined in
packages/core/src/oc/ObjectContainer.ts:746
_getEntryFromNamespace
▸ _getEntryFromNamespace<T>(path): null | Entry<T>
Retrieves the class denoted by the provided fully qualified name within the application namespace.
The method then checks whether there are dependencies 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.
Type parameters
| Name |
|---|
T |
Parameters
| Name | Type | Description |
|---|---|---|
path | string | Namespace path pointing to a class or a value in the application namespace, or a constructor function. |
Returns
null | Entry<T>
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.
Defined in
packages/core/src/oc/ObjectContainer.ts:802
_isOptional
▸ _isOptional<T>(name): boolean
Checks whether the name is marked as optional.
Type parameters
| Name |
|---|
T |
Parameters
| Name | Type | Description |
|---|---|---|
name | Dependency<T> | Name of a constant or alias, factory function, class or interface constructor, or a fully qualified namespace path. |
Returns
boolean
Defined in
packages/core/src/oc/ObjectContainer.ts:592
_isSpread
▸ _isSpread<T>(name): boolean
Checks whether the name is marked as spread.
Type parameters
| Name |
|---|
T |
Parameters
| Name | Type | Description |
|---|---|---|
name | Dependency<T> | Name of a constant or alias, factory function, class or interface constructor, or a fully qualified namespace path. |
Returns
boolean
Defined in
packages/core/src/oc/ObjectContainer.ts:606
_updateEntryValues
▸ _updateEntryValues<T, E>(entry, classConstructor, dependencies): void
The method update classConstructor and dependencies for defined entry. The entry throw Error for constants and if you try override dependencies more than once.
Type parameters
| Name | Type |
|---|---|
T | T |
E | extends Entry<T, E> |
Parameters
| Name | Type | Description |
|---|---|---|
entry | E | The entry representing the class that should have its instance created or factory faction to use to create a value. |
classConstructor | OCInjectable<T> | The class constructor or factory function. |
dependencies | any[] | The dependencies to pass into the constructor or factory function. |
Returns
void
Defined in
packages/core/src/oc/ObjectContainer.ts:625
bind
▸ bind<T, C>(name, classConstructor, dependencies?): ObjectContainer
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 specified 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.
Type parameters
| Name | Type |
|---|---|
T | extends keyof OCAliasMap |
C | C |
Parameters
| Name | Type | Description |
|---|---|---|
name | T | Alias name. |
classConstructor | OCInjectable<C> | The class constructor or a factory function. |
dependencies? | any[] | The dependencies to pass into the constructor or factory function. |
Returns
This object container.
Defined in
packages/core/src/oc/ObjectContainer.ts:114
clear
▸ clear(): ObjectContainer
Clears all entries from this object container and resets the locking mechanism of this object container.
Returns
This object container.
Defined in
packages/core/src/oc/ObjectContainer.ts:485
constant
▸ constant<T, V>(name, value): ObjectContainer
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.
Type parameters
| Name | Type |
|---|---|
T | extends keyof OCAliasMap |
V | V |
Parameters
| Name | Type | Description |
|---|---|---|
name | T | The constant name. |
value | V | The constant value. |
Returns
This object container.
Defined in
packages/core/src/oc/ObjectContainer.ts:200
create
▸ create<T>(name, dependencies?): OCInstance<T>
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.
Type parameters
| Name | Type |
|---|---|
T | extends OCInstanceConstrain<any> |
Parameters
| Name | Type | Default value | Description |
|---|---|---|---|
name | T | undefined | The name of the alias, class, interface, or the class, interface or a factory function to use. |
dependencies | any[] | [] | The dependencies to pass into the constructor or factory function. |
Returns
OCInstance<T>
Created instance or generated value.
Defined in
packages/core/src/oc/ObjectContainer.ts:463
get
▸ get<T>(name): OCInstance<T>
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.
Type parameters
| Name | Type |
|---|---|
T | extends OCInstanceConstrain<any> |
Parameters
| Name | Type | Description |
|---|---|---|
name | T | The name of the alias, class, interface, or the class, interface or a factory function. |
Returns
OCInstance<T>
The shared instance or value.
Defined in
packages/core/src/oc/ObjectContainer.ts:400
getConstructorOf
▸ getConstructorOf<T>(name): null | Constructor<T>
Returns the class constructor function of the specified class.
Type parameters
| Name | Type |
|---|---|
T | extends keyof OCAliasMap | Constructor<any> |
Parameters
| Name | Type | Description |
|---|---|---|
name | T | The name by which the class is registered with this object container. |
Returns
null | Constructor<T>
The constructor function.
Defined in
packages/core/src/oc/ObjectContainer.ts:418
has
▸ has<T>(name): boolean
Returns true if the specified object, class or resource is
registered with this object container.
Type parameters
| Name |
|---|
T |
Parameters
| Name | Type | Description |
|---|---|---|
name | keyof OCAliasMap | OCInjectable<T> | The resource name. |
Returns
boolean
true if the specified object, class or
resource is registered with this object container.
Defined in
packages/core/src/oc/ObjectContainer.ts:438
inject
▸ inject<T>(classConstructor, dependencies): ObjectContainer
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.
Type parameters
| Name |
|---|
T |
Parameters
| Name | Type | Description |
|---|---|---|
classConstructor | Constructor<T> | The class constructor. |
dependencies | any[] | The dependencies to pass into the constructor function. |
Returns
This object container.
Defined in
packages/core/src/oc/ObjectContainer.ts:244
provide
▸ provide<T, I>(interfaceConstructor, implementationConstructor, dependencies?): ObjectContainer
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 () method.
Type parameters
| Name |
|---|
T |
I |
Parameters
| Name | Type | Description |
|---|---|---|
interfaceConstructor | Constructor<I> | AbstractConstructor<I> | The constructor of the interface representing the service. |
implementationConstructor | Constructor<T> | The constructor of the class implementing the service interface. |
dependencies? | any[] | The dependencies to pass into the constructor function. |
Returns
This object container.
Defined in
packages/core/src/oc/ObjectContainer.ts:319
setBindingState
▸ setBindingState(bindingState, bindingPluginName?): void
Parameters
| Name | Type |
|---|---|
bindingState | BindingState |
bindingPluginName? | string |
Returns
void