Top Description Fields Constructors Methods
com.google.inject.spi

public final Class MembersInjectorLookup<T>

extends Object
implements Element
Class Inheritance
All Implemented Interfaces
com.google.inject.spi.Element
Static Imports
com.google.common.base.Preconditions.checkNotNull, .Preconditions.checkState
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);
Author
[email protected] (Bob Lee)
Since
2.0

Field Summary

Modifier and TypeField and Description
private MembersInjector<T>
delegate

private final Object
source

private final TypeLiteral<T>
type

Constructor Summary

AccessConstructor and Description
public
MembersInjectorLookup(Object source, TypeLiteral<T> type)

Method Summary

Modifier and TypeMethod and Description
public <T> T
acceptVisitor(ElementVisitor<T>
to call back on
visitor)

Implements com.google.inject.spi.Element.acceptVisitor.

Accepts an element visitor.
public void
applyTo(Binder
to apply configuration element to
binder)

Implements com.google.inject.spi.Element.applyTo.

Writes this module element to the given binder (optional operation).
public boolean
equals(Object
the reference object with which to compare.
obj)

Overrides java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.
public MembersInjector<T>
getDelegate()

Returns the delegate members injector, or null if it has not yet been initialized.

public Set<InjectionPoint>

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.
getInjectionPoints()

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

public MembersInjector<T>
getMembersInjector()

Returns the looked up members injector.

public Object
getSource()

Implements com.google.inject.spi.Element.getSource.

Returns an arbitrary object containing information about the "place" where this element was configured.
public TypeLiteral<T>
getType()

Gets the type containing the members to be injected.

public int
hashCode()

Overrides java.lang.Object.hashCode.

Returns a hash code value for this object.
public void
initializeDelegate(MembersInjector<T> delegate)

Sets the actual members injector.

Inherited from java.lang.Object:
clonefinalizegetClassnotifynotifyAlltoStringwaitwaitwait

Field Detail

delegateback to summary
private MembersInjector<T> delegate
sourceback to summary
private final Object source
typeback to summary
private final TypeLiteral<T> type

Constructor Detail

MembersInjectorLookupback to summary
public MembersInjectorLookup(Object source, TypeLiteral<T> type)

Method Detail

acceptVisitorback to summary
public <T> T acceptVisitor(ElementVisitor<T> visitor)

Implements com.google.inject.spi.Element.acceptVisitor.

Doc from com.google.inject.spi.Element.acceptVisitor.

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

Parameters
visitor:ElementVisitor<T>

to call back on

Annotations
@Override
applyToback to summary
public void applyTo(Binder binder)

Implements com.google.inject.spi.Element.applyTo.

Doc from com.google.inject.spi.Element.applyTo.

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

Parameters
binder:Binder

to apply configuration element to

Annotations
@Override
equalsback to summary
public boolean equals(Object obj)

Overrides java.lang.Object.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters
obj:Object

the reference object with which to compare.

Returns:boolean

true if this object is the same as the obj argument; false otherwise.

Annotations
@Override
getDelegateback to summary
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.

getInjectionPointsback to summary
public Set<InjectionPoint> getInjectionPoints() throws ConfigurationException

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

Returns:Set<InjectionPoint>

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.

Exceptions
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
getMembersInjectorback to summary
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.

getSourceback to summary
public Object getSource()

Implements com.google.inject.spi.Element.getSource.

Doc from com.google.inject.spi.Element.getSource.

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.

Annotations
@Override
getTypeback to summary
public TypeLiteral<T> getType()

Gets the type containing the members to be injected.

hashCodeback to summary
public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.
Returns:int

a hash code value for this object

Annotations
@Override
initializeDelegateback to summary
public void initializeDelegate(MembersInjector<T> delegate)

Sets the actual members injector.

Exceptions
IllegalStateException:
if the delegate is already set