spring security SecurityExpressionHandler 源码
spring security SecurityExpressionHandler 代码
文件路径：/core/src/main/java/org/springframework/security/access/expression/SecurityExpressionHandler.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.security.access.expression;
import java.util.function.Supplier;
import org.springframework.aop.framework.AopInfrastructureBean;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.ExpressionParser;
import org.springframework.security.core.Authentication;
/**
* Facade which isolates Spring Security's requirements for evaluating security
* expressions from the implementation of the underlying expression objects
*
* @author Luke Taylor
* @author Evgeniy Cheban
* @since 3.1
*/
public interface SecurityExpressionHandler<T> extends AopInfrastructureBean {
/**
* @return an expression parser for the expressions used by the implementation.
*/
ExpressionParser getExpressionParser();
/**
* Provides an evaluation context in which to evaluate security expressions for the
* invocation type.
*/
EvaluationContext createEvaluationContext(Authentication authentication, T invocation);
/**
* Provides an evaluation context in which to evaluate security expressions for the
* invocation type. You can override this method in order to provide a custom
* implementation that uses lazy initialization of the {@link Authentication} object.
* By default, this method uses eager initialization of the {@link Authentication}
* object.
* @param authentication the {@link Supplier} of the {@link Authentication} to use
* @param invocation the {@link T} to use
* @return the {@link EvaluationContext} to use
* @since 5.8
*/
default EvaluationContext createEvaluationContext(Supplier<Authentication> authentication, T invocation) {
return createEvaluationContext(authentication.get(), invocation);
}
}
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