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【Java】获取父类的泛型

作者:逆行者 / 发布于2015/8/3/ 610


	/*
	* Copyright 2009-2012 The MyBatis Team
	*
	* 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.
	*/
	package org.apache.ibatis.type;
	
	import java.lang.reflect.ParameterizedType;
	import java.lang.reflect.Type;
	
	/**
	* References a generic type.
	*
	* @param <T> the referenced type
	* @since 3.1.0
	*/
	public abstract class TypeReference<T> {
	
	 private Type rawType;
	
	 protected TypeReference() {
	 Type superclass = getClass().getGenericSuperclass();
	 if (superclass instanceof Class) {
	 throw new TypeException("TypeHandler '" + getClass() + "' extends TypeReference but misses the type parameter. "
	 + "Remove the extension or add a type parameter to it.");
	 }
	 rawType = ((ParameterizedType) superclass).getActualTypeArguments()[0];
	 // TODO remove this when Reflector is fixed to return Types
	 if (rawType instanceof ParameterizedType) {
	 rawType = ((ParameterizedType) rawType).getRawType();
	 }
	 }
	
	 public final Type getRawType() {
	 return rawType;
	 }
	
	 @Override
	 public String toString() {
	 return rawType.toString();
	 }
	
	}

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