com.google.inject.spi

Class MembersInjectorLookup<T>

java.lang.Object

com.google.inject.spi.MembersInjectorLookup<T>

All Implemented Interfaces:

Element

public final class MembersInjectorLookup<T>
extends java.lang.Object
implements Element

A lookup of the members injector for a type. Lookups are created explicitly in a module using getMembersInjector() statements:

     MembersInjector<PaymentService> membersInjector
         = getMembersInjector(PaymentService.class);

Since:

2.0

Constructor Summary

Constructors

Constructor and Description
MembersInjectorLookup(java.lang.Object source, TypeLiteral<T> type)

Method Summary

Modifier and Type	Method and Description
<T> T	acceptVisitor(ElementVisitor<T> visitor) Accepts an element visitor.
void	applyTo(Binder binder) Writes this module element to the given binder (optional operation).
boolean	equals(java.lang.Object obj)
MembersInjector<T>	getDelegate() Returns the delegate members injector, or null if it has not yet been initialized.
java.util.Set<InjectionPoint>	getInjectionPoints() Returns the instance methods and fields that will be injected to fulfill this request.
MembersInjector<T>	getMembersInjector() Returns the looked up members injector.
java.lang.Object	getSource() Returns an arbitrary object containing information about the "place" where this element was configured.
TypeLiteral<T>	getType() Gets the type containing the members to be injected.
int	hashCode()
void	initializeDelegate(MembersInjector<T> delegate) Sets the actual members injector.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MembersInjectorLookup

public MembersInjectorLookup(java.lang.Object source,
                             TypeLiteral<T> type)

Method Detail

getSource

public java.lang.Object getSource()

Description copied from interface: Element

Returns an arbitrary object containing information about the "place" where this element was configured. Used by Guice in the production of descriptive error messages.

Tools might specially handle types they know about; StackTraceElement is a good example. Tools should simply call toString() on the source object if the type is unfamiliar.

Specified by:

getSource in interface Element

getType

public TypeLiteral<T> getType()

Gets the type containing the members to be injected.

acceptVisitor

public <T> T acceptVisitor(ElementVisitor<T> visitor)

Description copied from interface: Element

Accepts an element visitor. Invokes the visitor method specific to this element's type.

Specified by:

acceptVisitor in interface Element

Parameters:

visitor - to call back on

initializeDelegate

public void initializeDelegate(MembersInjector<T> delegate)

Sets the actual members injector.

Throws:

java.lang.IllegalStateException - if the delegate is already set

applyTo

public void applyTo(Binder binder)

Description copied from interface: Element

Writes this module element to the given binder (optional operation).

Specified by:

applyTo in interface Element

Parameters:

binder - to apply configuration element to

getDelegate

public MembersInjector<T> getDelegate()

Returns the delegate members injector, or null if it has not yet been initialized. The delegate will be initialized when this element is processed, or otherwise used to create an injector.

getInjectionPoints

public java.util.Set<InjectionPoint> getInjectionPoints()
                                                 throws ConfigurationException

Returns the instance methods and fields that will be injected to fulfill this request.

Returns:

a possibly empty set of injection points. The set has a specified iteration order. All fields are returned and then all methods. Within the fields, supertype fields are returned before subtype fields. Similarly, supertype methods are returned before subtype methods.

Throws:

ConfigurationException - if there is a malformed injection point on the class of instance, such as a field with multiple binding annotations. The exception's partial value is a Set<InjectionPoint> of the valid injection points.

Since:

4.2.3

getMembersInjector

public MembersInjector<T> getMembersInjector()

Returns the looked up members injector. The result is not valid until this lookup has been initialized, which usually happens when the injector is created. The members injector will throw an IllegalStateException if you try to use it beforehand.

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object