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renamed getAnnotations to getMethodAnnotations; added getMethodAnnotation and getParameterAnnotation convenience methods

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This commit is contained in:
Juergen Hoeller
2009-10-01 15:20:31 +00:00
parent b152ac34fd
commit 71a045328c
2 changed files with 32 additions and 9 deletions
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37
org.springframework.core/src/main/java/org/springframework/core/MethodParameter.java
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@@ -31,10 +31,6 @@ import org.springframework.util.Assert;
* a Method or Constructor plus a parameter index and a nested type index for
* a declared generic type. Useful as a specification object to pass along.
*
* <p>Used by {@link GenericCollectionTypeResolver},
* {@link org.springframework.beans.BeanWrapperImpl} and
* {@link org.springframework.beans.factory.support.AbstractBeanFactory}.
*
* @author Juergen Hoeller
* @author Rob Harrop
* @author Andy Clement
@@ -212,22 +208,49 @@ public class MethodParameter {
/**
* Return the annotations associated with the target method/constructor itself.
*/
public Annotation[] getAnnotations() {
public Annotation[] getMethodAnnotations() {
return (this.method != null ? this.method.getAnnotations() : this.constructor.getAnnotations());
}
/**
* Return the method/constructor annotation of the given type, if available.
* @param annotationType the annotation type to look for
* @return the annotation object, or <code>null</code> if not found
*/
@SuppressWarnings("unchecked")
public <T extends Annotation> T getMethodAnnotation(Class<T> annotationType) {
return (this.method != null ? this.method.getAnnotation(annotationType) :
(T) this.constructor.getAnnotation(annotationType));
}
/**
* Return the annotations associated with the specific method/constructor parameter.
*/
public Annotation[] getParameterAnnotations() {
if (this.parameterAnnotations == null) {
Annotation[][] annotationArray = (this.method != null) ?
this.method.getParameterAnnotations() : this.constructor.getParameterAnnotations();
Annotation[][] annotationArray = (this.method != null ?
this.method.getParameterAnnotations() : this.constructor.getParameterAnnotations());
this.parameterAnnotations = annotationArray[this.parameterIndex];
}
return this.parameterAnnotations;
}
/**
* 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</code> 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;
}
/**
* Initialize parameter name discovery for this method parameter.
* <p>This method does not actually try to retrieve the parameter name at