pf4j/pf4j/src/main/java/org/pf4j/util/ClassUtils.java

/*
 * Copyright 2016 Decebal Suiu
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.pf4j.util;

import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;

/**
 * @author Decebal Suiu
 */
public class ClassUtils {

    public static List<String> getAllInterfacesNames(Class<?> aClass) {
        return toString(getAllInterfaces(aClass));
    }

    public static List<Class<?>> getAllInterfaces(Class<?> aClass) {
        List<Class<?>> list = new ArrayList<>();

        while (aClass != null) {
            Class<?>[] interfaces = aClass.getInterfaces();
            for (Class<?> anInterface : interfaces) {
                if (!list.contains(anInterface)) {
                    list.add(anInterface);
                }

                List<Class<?>> superInterfaces = getAllInterfaces(anInterface);
                for (Class<?> superInterface : superInterfaces) {
                    if (!list.contains(superInterface)) {
                        list.add(superInterface);
                    }
                }
            }

            aClass = aClass.getSuperclass();
        }

        return list;
    }

    /*
    public static List<String> getAllAbstractClassesNames(Class<?> aClass) {
        return toString(getAllInterfaces(aClass));
    }

    public static List getAllAbstractClasses(Class aClass) {
        List<Class<?>> list = new ArrayList<>();

        Class<?> superclass = aClass.getSuperclass();
        while (superclass != null) {
            if (Modifier.isAbstract(superclass.getModifiers())) {
                list.add(superclass);
            }
            superclass = superclass.getSuperclass();
        }

        return list;
    }
    */

    /**
     * Uses {@link Class#getSimpleName()} to convert from {@link Class} to {@link String}.
     *
     * @param classes
     * @return
     */
    private static List<String> toString(List<Class<?>> classes) {
        List<String> list = new ArrayList<>();

        for (Class<?> aClass : classes) {
            list.add(aClass.getSimpleName());
        }

        return list;
    }

}