Java Reflection Generic Type from Class getGenericClass(Type type)

Description

get Generic Class

License

Apache License

Declaration

public static Class<?> getGenericClass(Type type) 

Method Source Code

//package com.java2s;
/**/*from   w w  w . j av a2 s.  c om*/
 * Copyright 2012 Comcast Cable Communications Management, LLC
 *
 * 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;

public class Main {
    public static Class<?> getGenericClass(Type type) {
        return getGenericClass(type, 0);
    }

    public static Class<?> getGenericClass(Type type, int arg) {
        if ((null == type) || !ParameterizedType.class.isAssignableFrom(type.getClass())) {
            return null;
        }

        try {
            ParameterizedType paramType = (ParameterizedType) type;
            return (Class<?>) paramType.getActualTypeArguments()[arg];
        } catch (Throwable throwable) {
            return null;
        }
    }
}

Related

1. getGenericClass(final Class parametrizedClass, int pos)
2. getGenericClass(final Method method)
3. getGenericClass(Object o)
4. getGenericClass(Object object, int index)
5. getGenericClass(Object source, ParameterizedType type)
6. getGenericClassByIndex(Type genericType, int index)
7. getGenericClassType(Class clazz, Class filterClass)
8. getGenericDeclaringType(Class baseClass, Class declaringClass)
9. getGenericFirstClass(Type type)