spring ResolvableTypeProvider 源码
spring ResolvableTypeProvider 代码
文件路径：/spring-core/src/main/java/org/springframework/core/ResolvableTypeProvider.java
/*
* Copyright 2002-2017 the original author or authors.
*
* 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
*
* https://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.springframework.core;
import org.springframework.lang.Nullable;
/**
* Any object can implement this interface to provide its actual {@link ResolvableType}.
*
* <p>Such information is very useful when figuring out if the instance matches a generic
* signature as Java does not convey the signature at runtime.
*
* <p>Users of this interface should be careful in complex hierarchy scenarios, especially
* when the generic type signature of the class changes in subclasses. It is always
* possible to return {@code null} to fallback on a default behavior.
*
* @author Stephane Nicoll
* @since 4.2
*/
public interface ResolvableTypeProvider {
/**
* Return the {@link ResolvableType} describing this instance
* (or {@code null} if some sort of default should be applied instead).
*/
@Nullable
ResolvableType getResolvableType();
}
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