Java Utililty Methods Class Hierarchy Get

List of utility methods to do Class Hierarchy Get

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Description

The list of methods to do Class Hierarchy Get are organized into topic(s).

Method

List>getClassHierarchy(Class beanClass)
Creates all class hierarchy from the given class to Object, exclusive, i.e. 
List<Class<?>> classes = new ArrayList<Class<?>>();
Class<?> current = beanClass;
while (current != Object.class) {
    classes.add(current);
    current = current.getSuperclass();
return classes;
Class[]getClassHierarchy(Class type)
Returns an array of class objects representing the entire class hierarchy with the most-super class as the first element followed by all subclasses in the order they are declared. 
ArrayDeque<Class<?>> classes = new ArrayDeque<Class<?>>();
Class<?> classType = type;
while (classType != null && !classType.equals(Object.class)) {
    classes.addFirst(classType);
    classType = classType.getSuperclass();
return classes.toArray(new Class[0]);
List>getClassHierarchy(Object obj, Class ignoreClass)
Gets the class hierarchy 
List<Class<?>> ret = new ArrayList<Class<?>>();
if (null != obj) {
    Class<?> clazz = obj.getClass();
    while (null != clazz && (ignoreClass != clazz)) {
        ret.add(0, clazz);
        clazz = clazz.getSuperclass();
return ret;
intgetDistance(Class a, Class b)
get Distance 
if (a.isInterface()) {
    return getDistanceToInterface(a, b);
Class curr = b;
int distance = 0;
while (curr != a) {
    distance++;
    curr = curr.getSuperclass();
...
intgetDistanceToInterface(Class to, Class from)
get Distance To Interface 
Set<Class<?>> possibleCandidates = new LinkedHashSet<Class<?>>();
Class<?>[] interfaces = from.getInterfaces();
for (Class<?> interfase : interfaces) {
    if (to.equals(interfase)) {
        return 1;
    if (to.isAssignableFrom(interfase)) {
        possibleCandidates.add(interfase);
...
Class[]getTypeHierarchy(Class cls)
get Type Hierarchy 
ArrayList<Class<?>> result = getTypeHierarchy(cls, new ArrayList<>());
return result.toArray(new Class<?>[result.size()]);