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Revised 4.3 signatures for MethodParameter/DependencyDescriptor

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Issue: SPR-13440
This commit is contained in:
Juergen Hoeller
2016-03-23 18:52:27 +01:00
parent 9af12d290e
commit c5b318a4cc
2 changed files with 36 additions and 19 deletions
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53
spring-core/src/main/java/org/springframework/core/MethodParameter.java
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@@ -406,6 +406,7 @@ public class MethodParameter {
Integer index = getTypeIndexForLevel(i);
type = args[index != null ? index : args.length - 1];
}
// TODO: Object.class if unresolvable
}
if (type instanceof Class) {
return (Class<?>) type;
@@ -462,6 +463,16 @@ public class MethodParameter {
return adaptAnnotation(getAnnotatedElement().getAnnotation(annotationType));
}
/**
* Return whether the method/constructor is annotated with the given type.
* @param annotationType the annotation type to look for
* @since 4.3
* @see #getMethodAnnotation(Class)
*/
public <A extends Annotation> boolean hasMethodAnnotation(Class<A> annotationType) {
return getAnnotatedElement().isAnnotationPresent(annotationType);
}
/**
* Return the annotations associated with the specific method/constructor parameter.
*/
@@ -480,32 +491,36 @@ public class MethodParameter {
}
/**
* Return the parameter annotation of the given type, if available.
* @param annotationType the annotation type to look for
* @return the annotation object, or {@code null} if not found
*/
@SuppressWarnings("unchecked")
public <T extends Annotation> T getParameterAnnotation(Class<T> annotationType) {
Annotation[] anns = getParameterAnnotations();
for (Annotation ann : anns) {
if (annotationType.isInstance(ann)) {
return (T) ann;
}
}
return null;
}
/**
* Return true if the parameter has at least one annotation, false if it has none.
* Return {@code true} if the parameter has at least one annotation,
* {@code false} if it has none.
* @see #getParameterAnnotations()
*/
public boolean hasParameterAnnotations() {
return (getParameterAnnotations().length != 0);
}
/**
* Return true if the parameter has the given annotation type, and false if it doesn't.
* Return the parameter annotation of the given type, if available.
* @param annotationType the annotation type to look for
* @return the annotation object, or {@code null} if not found
*/
public <T extends Annotation> boolean hasParameterAnnotation(Class<T> annotationType) {
@SuppressWarnings("unchecked")
public <A extends Annotation> A getParameterAnnotation(Class<A> annotationType) {
Annotation[] anns = getParameterAnnotations();
for (Annotation ann : anns) {
if (annotationType.isInstance(ann)) {
return (A) ann;
}
}
return null;
}
/**
* Return whether the parameter is declared with the given annotation type.
* @param annotationType the annotation type to look for
* @see #getParameterAnnotation(Class)
*/
public <A extends Annotation> boolean hasParameterAnnotation(Class<A> annotationType) {
return (getParameterAnnotation(annotationType) != null);
}