spring OperationArgumentResolver 源码
springboot OperationArgumentResolver 代码
文件路径：/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/OperationArgumentResolver.java
/*
* Copyright 2012-2021 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.boot.actuate.endpoint;
import java.util.function.Supplier;
import org.springframework.util.Assert;
/**
* Resolver for an argument of an {@link Operation}.
*
* @author Andy Wilkinson
* @since 2.5.0
*/
public interface OperationArgumentResolver {
/**
* Return whether an argument of the given {@code type} can be resolved.
* @param type argument type
* @return {@code true} if an argument of the required type can be resolved, otherwise
* {@code false}
*/
boolean canResolve(Class<?> type);
/**
* Resolves an argument of the given {@code type}.
* @param <T> required type of the argument
* @param type argument type
* @return an argument of the required type, or {@code null}
*/
<T> T resolve(Class<T> type);
/**
* Factory method that creates an {@link OperationArgumentResolver} for a specific
* type using a {@link Supplier}.
* @param <T> the resolvable type
* @param type the resolvable type
* @param supplier the value supplier
* @return an {@link OperationArgumentResolver} instance
*/
static <T> OperationArgumentResolver of(Class<T> type, Supplier<? extends T> supplier) {
Assert.notNull(type, "Type must not be null");
Assert.notNull(supplier, "Supplier must not be null");
return new OperationArgumentResolver() {
@Override
public boolean canResolve(Class<?> actualType) {
return actualType.equals(type);
}
@Override
@SuppressWarnings("unchecked")
public <R> R resolve(Class<R> argumentType) {
return (R) supplier.get();
}
};
}
}
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- 本文标签： Java Spring Spring Boot
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