Java Reflection Generic Type from Class getGenericSuperclassActualTypes(Collection types, Class aClass)

Description

get Generic Superclass Actual Types

License

Apache License

Declaration

public static void getGenericSuperclassActualTypes(Collection<Type> types, Class aClass) 

Method Source Code

//package com.java2s;
/*/*w  w w.j  ava2 s .  com*/
 * Copyright (C) 2013 the original author or authors.
 * See the notice.md file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * 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.
 */

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

import java.util.Arrays;
import java.util.Collection;

public class Main {
    public static void getGenericSuperclassActualTypes(Collection<Type> types, Class aClass) {
        if (aClass != null && types != null) {
            Type superclass = aClass.getGenericSuperclass();
            if (superclass instanceof ParameterizedType) {
                ParameterizedType parameterizedType = (ParameterizedType) superclass;
                Type[] interfaces = parameterizedType.getActualTypeArguments();
                types.addAll(Arrays.asList(interfaces));
            } else if (superclass instanceof Class) {
                Class sClass = (Class) superclass;
                getGenericInterfacesActualTypes(types, sClass);
                getGenericSuperclassActualTypes(types, aClass.getSuperclass());
            }
        }
    }

    public static void getGenericInterfacesActualTypes(Collection<Type> types, Class aClass) {
        if (aClass != null && types != null) {
            Type[] interfaces = aClass.getGenericInterfaces();
            for (Type anInterface : interfaces) {
                if (anInterface instanceof ParameterizedType) {
                    ParameterizedType parameterizedType = (ParameterizedType) anInterface;
                    Type[] actualTypes = parameterizedType.getActualTypeArguments();
                    types.addAll(Arrays.asList(actualTypes));
                } else if (anInterface instanceof Class) {
                    Class typeClass = (Class) anInterface;
                    getGenericInterfacesActualTypes(types, typeClass);
                }
            }
        }
    }
}

Related

1. getGenericParameterType0(Class cls, Class genericSuper, int paramIndex)
2. getGenerics(Class classType)
3. getGenericsClass(Class cls)
4. getGenericSuperclass(Class clazz)
5. getGenericSuperclass(Class cls)
6. getGenericSuperType(Class clz, int index)
7. getGenericSuperType(Class subclass, Class classWithParameter)
8. getGenericSuperType(Class class1, Class class2)
9. getGenericType(Class clazz, int index)