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Workaround for generic parameter types on inner class constructors

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Issue: SPR-16734
This commit is contained in:
Juergen Hoeller
2018-04-17 15:59:08 +02:00
parent 6a727e1ed7
commit c09e10405b
2 changed files with 37 additions and 13 deletions
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25
spring-core/src/main/java/org/springframework/core/MethodParameter.java
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@@ -337,7 +337,6 @@ public class MethodParameter {
return (isOptional() ? nested() : this);
}
/**
* Set a containing class to resolve the parameter type against.
*/
@@ -390,9 +389,19 @@ public class MethodParameter {
paramType = (method != null ? method.getGenericReturnType() : void.class);
}
else {
paramType = (this.method != null ?
this.method.getGenericParameterTypes()[this.parameterIndex] :
this.constructor.getGenericParameterTypes()[this.parameterIndex]);
Type[] genericParameterTypes = (this.method != null ?
this.method.getGenericParameterTypes() : this.constructor.getGenericParameterTypes());
int index = this.parameterIndex;
if (this.constructor != null && this.constructor.getDeclaringClass().isMemberClass() &&
!Modifier.isStatic(this.constructor.getDeclaringClass().getModifiers()) &&
genericParameterTypes.length == this.constructor.getParameterTypes().length - 1) {
// Bug in javac: type array excludes enclosing instance parameter
// for inner classes with at least one generic constructor parameter,
// so access it with the actual parameter index lowered by 1
index = this.parameterIndex - 1;
}
paramType = (index >= 0 && index < genericParameterTypes.length ?
genericParameterTypes[index] : getParameterType());
}
this.genericParameterType = paramType;
}
@@ -497,12 +506,8 @@ public class MethodParameter {
// for inner classes, so access it with the actual parameter index lowered by 1
index = this.parameterIndex - 1;
}
if (index >= 0 && index < annotationArray.length) {
paramAnns = adaptAnnotationArray(annotationArray[index]);
}
else {
paramAnns = EMPTY_ANNOTATION_ARRAY;
}
paramAnns = (index >= 0 && index < annotationArray.length ?
adaptAnnotationArray(annotationArray[index]) : EMPTY_ANNOTATION_ARRAY);
this.parameterAnnotations = paramAnns;
}
return paramAnns;