package com.lexicalscope.fluentreflection;

 import static com.google.inject.internal.MoreTypes.canonicalize;

 import java.lang.reflect.ParameterizedType;

 import java.lang.reflect.Type;

 /*

  * Copyright 2011 Tim Wood

  *

  * 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.

  */

 /**

  * Used to supply generic type information to the library. You use this class by creating anonymous subclasses of it.

  *

  * @author tim

  *

  * @param <T> the generic type information.

  */

 public class TypeToken<T> {

     Type getSuperclassTypeParameter() {

         final Type superclass = this.getClass().getGenericSuperclass();

         if (superclass instanceof Class) {

             throw new RuntimeException("Missing type parameter.");

         }

         final ParameterizedType parameterized = (ParameterizedType) superclass;

         return canonicalize(parameterized.getActualTypeArguments()[0]);

     }

 }