io.logspace.agent.shaded.quartz.utils.ClassUtils Maven / Gradle / Ivy
package io.logspace.agent.shaded.quartz.utils;
import java.lang.annotation.Annotation;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.Queue;
public class ClassUtils {
public static boolean isAnnotationPresent(Class clazz, Class a) {
for (Class c = clazz; c != null; c = c.getSuperclass()) {
if (c.isAnnotationPresent(a))
return true;
if(isAnnotationPresentOnInterfaces(c, a))
return true;
}
return false;
}
private static boolean isAnnotationPresentOnInterfaces(Class clazz, Class a) {
for(Class i : clazz.getInterfaces()) {
if( i.isAnnotationPresent(a) )
return true;
if(isAnnotationPresentOnInterfaces(i, a))
return true;
}
return false;
}
public static T getAnnotation(Class clazz, Class aClazz) {
//Check class hierarchy
for (Class c = clazz; c != null; c = c.getSuperclass()) {
T anno = c.getAnnotation(aClazz);
if (anno != null) {
return anno;
}
}
//Check interfaces (breadth first)
Queue> q = new LinkedList>();
q.add(clazz);
while (!q.isEmpty()) {
Class c = q.remove();
if (c != null) {
if (c.isInterface()) {
T anno = c.getAnnotation(aClazz);
if (anno != null) {
return anno;
}
} else {
q.add(c.getSuperclass());
}
q.addAll(Arrays.asList(c.getInterfaces()));
}
}
return null;
}
}