87 lines
2.5 KiB
Java
87 lines
2.5 KiB
Java
/* Copyright 2010 Abhinav Sarkar <abhinav@abhinavsarkar.net>
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*
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* This file is a part of SpelHelper library.
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*
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* SpelHelper library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License (GNU LGPL) as
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* published by the Free Software Foundation, either version 3 of the License,
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* or (at your option) any later version.
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*
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* SpelHelper library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with SpelHelper library. If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.abhinavsarkar.spelhelper;
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import java.util.LinkedHashSet;
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import java.util.Set;
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final class InheritenceUtil {
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private InheritenceUtil() {
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}
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public static Set<Class<?>> getInheritance(final Class<?> clazz) {
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LinkedHashSet<Class<?>> result = new LinkedHashSet<Class<?>>();
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result.add(clazz);
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getInheritance(clazz, result);
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return result;
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}
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/**
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* Get inheritance of type.
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*
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* @param clazz
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* @param result
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*/
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private static void getInheritance(final Class<?> clazz, final Set<Class<?>> result) {
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Class<?> superclass = getSuperclass(clazz);
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if (superclass != null) {
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result.add(superclass);
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getInheritance(superclass, result);
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}
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getInterfaceInheritance(clazz, result);
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}
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/**
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* Get interfaces that the type inherits from.
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*
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* @param clazz
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* @param result
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*/
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private static void getInterfaceInheritance(final Class<?> clazz,
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final Set<Class<?>> result) {
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for (Class<?> c : clazz.getInterfaces()) {
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result.add(c);
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getInterfaceInheritance(c, result);
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}
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}
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/**
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* Get superclass of class.
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*
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* @param clazz
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* @return
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*/
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private static Class<?> getSuperclass(final Class<?> clazz) {
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if (clazz == null) {
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return null;
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}
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if (clazz.isArray() && clazz != Object[].class) {
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Class<?> type = clazz.getComponentType();
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while (type.isArray()) {
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type = type.getComponentType();
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}
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return type;
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}
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return clazz.getSuperclass();
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}
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}
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