spring BeanMethod 源码
spring BeanMethod 代码
文件路径：/spring-context/src/main/java/org/springframework/context/annotation/BeanMethod.java
/*
* Copyright 2002-2021 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.context.annotation;
import org.springframework.beans.factory.parsing.Problem;
import org.springframework.beans.factory.parsing.ProblemReporter;
import org.springframework.core.type.MethodMetadata;
import org.springframework.lang.Nullable;
/**
* Represents a {@link Configuration @Configuration} class method annotated with
* {@link Bean @Bean}.
*
* @author Chris Beams
* @author Juergen Hoeller
* @author Sam Brannen
* @since 3.0
* @see ConfigurationClass
* @see ConfigurationClassParser
* @see ConfigurationClassBeanDefinitionReader
*/
final class BeanMethod extends ConfigurationMethod {
BeanMethod(MethodMetadata metadata, ConfigurationClass configurationClass) {
super(metadata, configurationClass);
}
@Override
public void validate(ProblemReporter problemReporter) {
if (getMetadata().isStatic()) {
// static @Bean methods have no constraints to validate -> return immediately
return;
}
if (this.configurationClass.getMetadata().isAnnotated(Configuration.class.getName())) {
if (!getMetadata().isOverridable()) {
// instance @Bean methods within @Configuration classes must be overridable to accommodate CGLIB
problemReporter.error(new NonOverridableMethodError());
}
}
}
@Override
public boolean equals(@Nullable Object obj) {
return ((this == obj) || ((obj instanceof BeanMethod) &&
this.metadata.equals(((BeanMethod) obj).metadata)));
}
@Override
public int hashCode() {
return this.metadata.hashCode();
}
@Override
public String toString() {
return "BeanMethod: " + this.metadata;
}
private class NonOverridableMethodError extends Problem {
NonOverridableMethodError() {
super(String.format("@Bean method '%s' must not be private or final; change the method's modifiers to continue",
getMetadata().getMethodName()), getResourceLocation());
}
}
}
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