Java Reflection Generic Type from Class getGenericClass(final Class parametrizedClass, int pos)

Description

get Generic Class

License

Apache License

Declaration

public static <T> Class<T> getGenericClass(final Class<?> parametrizedClass, int pos) 

Method Source Code

//package com.java2s;
/*//from w  w  w . j a  v a 2 s  .co  m
 * Copyright 2015 Red Hat Inc. and/or its affiliates and other contributors.
 *
 * 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.TypeVariable;

public class Main {
    public static <T> Class<T> getGenericClass(final Class<?> parametrizedClass, int pos) {
        final ParameterizedType pType = (ParameterizedType) parametrizedClass.getGenericSuperclass();
        final TypeVariable tv = (TypeVariable) pType.getActualTypeArguments()[pos];

        if (tv.getBounds()[0] instanceof ParameterizedType) {
            return (Class<T>) ((ParameterizedType) tv.getBounds()[0]).getRawType();
        } else {
            return (Class<T>) tv.getBounds()[0];
        }
    }
}

Related

1. getGenericClass(Class clazz, int index)
2. getGenericClass(Class clazz)
3. getGenericClass(Class clazz, int index)
4. getGenericClass(Class cls)
5. getGenericClass(final Class class1)
6. getGenericClass(final Class parametrizedClass, int pos)
7. getGenericClass(final Method method)
8. getGenericClass(Object o)
9. getGenericClass(Object object, int index)