spring-graphql ArgumentsMethodArgumentResolver 源码
spring-graphql ArgumentsMethodArgumentResolver 代码
文件路径：/spring-graphql/src/main/java/org/springframework/graphql/data/method/annotation/support/ArgumentsMethodArgumentResolver.java
/*
* Copyright 2002-2022 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.graphql.data.method.annotation.support;
import graphql.schema.DataFetchingEnvironment;
import org.springframework.core.MethodParameter;
import org.springframework.core.ResolvableType;
import org.springframework.graphql.data.GraphQlArgumentBinder;
import org.springframework.graphql.data.method.HandlerMethodArgumentResolver;
import org.springframework.graphql.data.method.annotation.Arguments;
import org.springframework.util.Assert;
/**
* Analogous to {@link ArgumentMethodArgumentResolver} but resolving method
* parameters annotated with {@link Arguments @Arguments} and binding with the
* full {@link DataFetchingEnvironment#getArgument(String) arguments} map.
*
* @author Rossen Stoyanchev
* @since 1.0.0
*/
public class ArgumentsMethodArgumentResolver implements HandlerMethodArgumentResolver {
private final GraphQlArgumentBinder argumentBinder;
public ArgumentsMethodArgumentResolver(GraphQlArgumentBinder argumentBinder) {
Assert.notNull(argumentBinder, "GraphQlArgumentBinder is required");
this.argumentBinder = argumentBinder;
}
@Override
public boolean supportsParameter(MethodParameter parameter) {
return parameter.getParameterAnnotation(Arguments.class) != null;
}
@Override
public Object resolveArgument(MethodParameter parameter, DataFetchingEnvironment environment) throws Exception {
ResolvableType resolvableType = ResolvableType.forMethodParameter(parameter);
return this.argumentBinder.bind(environment, null, resolvableType);
}
}
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