org.springframework.beans.factory

Class InjectionPoint

java.lang.Object

org.springframework.beans.factory.InjectionPoint

Direct Known Subclasses:

DependencyDescriptor

public class InjectionPoint
extends java.lang.Object

A simple descriptor for an injection point, pointing to a method/constructor parameter or a field. Exposed by UnsatisfiedDependencyException.

Since:

4.3

Author:

Juergen Hoeller

See Also:

UnsatisfiedDependencyException.getInjectionPoint(), DependencyDescriptor

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.reflect.Field	field
protected MethodParameter	methodParameter

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	InjectionPoint() Just available for serialization purposes in subclasses.
	InjectionPoint(java.lang.reflect.Field field) Create an injection point descriptor for a field.
protected	InjectionPoint(InjectionPoint original) Copy constructor.
	InjectionPoint(MethodParameter methodParameter) Create an injection point descriptor for a method or constructor parameter.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object other)
java.lang.reflect.AnnotatedElement	getAnnotatedElement() Return the wrapped annotated element.
<A extends java.lang.annotation.Annotation> A	getAnnotation(java.lang.Class<A> annotationType) Retrieve a field/parameter annotation of the given type, if any.
java.lang.annotation.Annotation[]	getAnnotations() Obtain the annotations associated with the wrapped field or method/constructor parameter.
java.lang.Class<?>	getDeclaredType() Return the type declared by the underlying field or method/constructor parameter, indicating the injection type.
java.lang.reflect.Field	getField() Return the wrapped Field, if any.
java.lang.reflect.Member	getMember() Returns the wrapped member, containing the injection point.
MethodParameter	getMethodParameter() Return the wrapped MethodParameter, if any.
int	hashCode()
protected MethodParameter	obtainMethodParameter() Return the wrapped MethodParameter, assuming it is present.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

methodParameter

@Nullable
protected MethodParameter methodParameter

field

@Nullable
protected java.lang.reflect.Field field

Constructor Detail

InjectionPoint

public InjectionPoint(MethodParameter methodParameter)

Create an injection point descriptor for a method or constructor parameter.

Parameters:

methodParameter - the MethodParameter to wrap

InjectionPoint

public InjectionPoint(java.lang.reflect.Field field)

Create an injection point descriptor for a field.

Parameters:

field - the field to wrap

InjectionPoint

protected InjectionPoint(InjectionPoint original)

Copy constructor.

Parameters:

original - the original descriptor to create a copy from

InjectionPoint

protected InjectionPoint()

Just available for serialization purposes in subclasses.

Method Detail

getMethodParameter

@Nullable
public MethodParameter getMethodParameter()

Return the wrapped MethodParameter, if any.

Note: Either MethodParameter or Field is available.

Returns:

the MethodParameter, or null if none

getField

@Nullable
public java.lang.reflect.Field getField()

Return the wrapped Field, if any.

Note: Either MethodParameter or Field is available.

Returns:

the Field, or null if none

obtainMethodParameter

protected final MethodParameter obtainMethodParameter()

Return the wrapped MethodParameter, assuming it is present.

Returns:

the MethodParameter (never null)

Throws:

java.lang.IllegalStateException - if no MethodParameter is available

Since:

5.0

getAnnotations

public java.lang.annotation.Annotation[] getAnnotations()

Obtain the annotations associated with the wrapped field or method/constructor parameter.

getAnnotation

@Nullable
public <A extends java.lang.annotation.Annotation> A getAnnotation(java.lang.Class<A> annotationType)

Retrieve a field/parameter annotation of the given type, if any.

Parameters:

annotationType - the annotation type to retrieve

Returns:

the annotation instance, or null if none found

Since:

4.3.9

getDeclaredType

public java.lang.Class<?> getDeclaredType()

Return the type declared by the underlying field or method/constructor parameter, indicating the injection type.

getMember

public java.lang.reflect.Member getMember()

Returns the wrapped member, containing the injection point.

Returns:

the Field / Method / Constructor as Member

getAnnotatedElement

public java.lang.reflect.AnnotatedElement getAnnotatedElement()

Return the wrapped annotated element.

Note: In case of a method/constructor parameter, this exposes the annotations declared on the method or constructor itself (i.e. at the method/constructor level, not at the parameter level). Use getAnnotations() to obtain parameter-level annotations in such a scenario, transparently with corresponding field annotations.

Returns:

the Field / Method / Constructor as AnnotatedElement

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object