@ -1,5 +1,5 @@
@@ -1,5 +1,5 @@
/ *
* Copyright 2002 - 2019 the original author or authors .
* Copyright 2002 - 202 1 the original author or authors .
*
* Licensed under the Apache License , Version 2 . 0 ( the "License" ) ;
* you may not use this file except in compliance with the License .
@ -18,7 +18,6 @@ package org.springframework.beans.factory.annotation;
@@ -18,7 +18,6 @@ package org.springframework.beans.factory.annotation;
import java.lang.annotation.Annotation ;
import java.lang.reflect.AnnotatedElement ;
import java.lang.reflect.Constructor ;
import java.lang.reflect.Executable ;
import java.lang.reflect.Parameter ;
@ -30,7 +29,6 @@ import org.springframework.core.annotation.AnnotatedElementUtils;
@@ -30,7 +29,6 @@ import org.springframework.core.annotation.AnnotatedElementUtils;
import org.springframework.core.annotation.SynthesizingMethodParameter ;
import org.springframework.lang.Nullable ;
import org.springframework.util.Assert ;
import org.springframework.util.ClassUtils ;
/ * *
* Public delegate for resolving autowirable parameters on externally managed
@ -81,10 +79,9 @@ public final class ParameterResolutionDelegate {
@@ -81,10 +79,9 @@ public final class ParameterResolutionDelegate {
* /
public static boolean isAutowirable ( Parameter parameter , int parameterIndex ) {
Assert . notNull ( parameter , "Parameter must not be null" ) ;
AnnotatedElement annotatedParameter = getEffectiveAnnotatedParameter ( parameter , parameterIndex ) ;
return ( AnnotatedElementUtils . hasAnnotation ( annotatedParameter , Autowired . class ) | |
AnnotatedElementUtils . hasAnnotation ( annotatedParameter , Qualifier . class ) | |
AnnotatedElementUtils . hasAnnotation ( annotatedParameter , Value . class ) ) ;
return ( AnnotatedElementUtils . hasAnnotation ( parameter , Autowired . class ) | |
AnnotatedElementUtils . hasAnnotation ( parameter , Qualifier . class ) | |
AnnotatedElementUtils . hasAnnotation ( parameter , Value . class ) ) ;
}
/ * *
@ -125,8 +122,7 @@ public final class ParameterResolutionDelegate {
@@ -125,8 +122,7 @@ public final class ParameterResolutionDelegate {
Assert . notNull ( containingClass , "Containing class must not be null" ) ;
Assert . notNull ( beanFactory , "AutowireCapableBeanFactory must not be null" ) ;
AnnotatedElement annotatedParameter = getEffectiveAnnotatedParameter ( parameter , parameterIndex ) ;
Autowired autowired = AnnotatedElementUtils . findMergedAnnotation ( annotatedParameter , Autowired . class ) ;
Autowired autowired = AnnotatedElementUtils . findMergedAnnotation ( parameter , Autowired . class ) ;
boolean required = ( autowired = = null | | autowired . required ( ) ) ;
MethodParameter methodParameter = SynthesizingMethodParameter . forExecutable (
@ -136,36 +132,4 @@ public final class ParameterResolutionDelegate {
@@ -136,36 +132,4 @@ public final class ParameterResolutionDelegate {
return beanFactory . resolveDependency ( descriptor , null ) ;
}
/ * *
* Due to a bug in { @code javac } on JDK versions prior to JDK 9 , looking up
* annotations directly on a { @link Parameter } will fail for inner class
* constructors .
* < h4 > Bug in javac in JDK & lt ; 9 < / h4 >
* < p > The parameter annotations array in the compiled byte code excludes an entry
* for the implicit < em > enclosing instance < / em > parameter for an inner class
* constructor .
* < h4 > Workaround < / h4 >
* < p > This method provides a workaround for this off - by - one error by allowing the
* caller to access annotations on the preceding { @link Parameter } object ( i . e . ,
* { @code index - 1 } ) . If the supplied { @code index } is zero , this method returns
* an empty { @code AnnotatedElement } .
* < h4 > WARNING < / h4 >
* < p > The { @code AnnotatedElement } returned by this method should never be cast and
* treated as a { @code Parameter } since the metadata ( e . g . , { @link Parameter # getName ( ) } ,
* { @link Parameter # getType ( ) } , etc . ) will not match those for the declared parameter
* at the given index in an inner class constructor .
* @return the supplied { @code parameter } or the < em > effective < / em > { @code Parameter }
* if the aforementioned bug is in effect
* /
private static AnnotatedElement getEffectiveAnnotatedParameter ( Parameter parameter , int index ) {
Executable executable = parameter . getDeclaringExecutable ( ) ;
if ( executable instanceof Constructor & & ClassUtils . isInnerClass ( executable . getDeclaringClass ( ) ) & &
executable . getParameterAnnotations ( ) . length = = executable . getParameterCount ( ) - 1 ) {
// Bug in javac in JDK <9: annotation array excludes enclosing instance parameter
// for inner classes, so access it with the actual parameter index lowered by 1
return ( index = = 0 ? EMPTY_ANNOTATED_ELEMENT : executable . getParameters ( ) [ index - 1 ] ) ;
}
return parameter ;
}
}