1 package com.lexicalscope.fluentreflection;
2
3 import static com.google.inject.internal.MoreTypes.canonicalize;
4
5 import java.lang.reflect.ParameterizedType;
6 import java.lang.reflect.Type;
7
8 /*
9 * Copyright 2011 Tim Wood
10 *
11 * Licensed under the Apache License, Version 2.0 (the "License");
12 * you may not use this file except in compliance with the License.
13 * You may obtain a copy of the License at
14 *
15 * http://www.apache.org/licenses/LICENSE-2.0
16 *
17 * Unless required by applicable law or agreed to in writing, software
18 * distributed under the License is distributed on an "AS IS" BASIS,
19 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
20 * See the License for the specific language governing permissions and
21 * limitations under the License.
22 */
23
24 /**
25 * Used to supply generic type information to the library. You use this class by creating anonymous subclasses of it.
26 *
27 * @author tim
28 *
29 * @param <T> the generic type information.
30 */
31 public class TypeToken<T> {
32 Type getSuperclassTypeParameter() {
33 final Type superclass = this.getClass().getGenericSuperclass();
34 if (superclass instanceof Class) {
35 throw new RuntimeException("Missing type parameter.");
36 }
37 final ParameterizedType parameterized = (ParameterizedType) superclass;
38 return canonicalize(parameterized.getActualTypeArguments()[0]);
39 }
40 }