spring security ExpressionAttribute 源码
spring security ExpressionAttribute 代码
文件路径：/core/src/main/java/org/springframework/security/authorization/method/ExpressionAttribute.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.security.authorization.method;
import org.springframework.expression.Expression;
/**
* An {@link Expression} attribute.
*
* @author Evgeniy Cheban
* @since 5.5
*/
class ExpressionAttribute {
/**
* Represents an empty attribute with null {@link Expression}.
*/
static final ExpressionAttribute NULL_ATTRIBUTE = new ExpressionAttribute(null);
private final Expression expression;
/**
* Creates an instance.
* @param expression the {@link Expression} to use
*/
ExpressionAttribute(Expression expression) {
this.expression = expression;
}
/**
* Returns the {@link Expression}.
* @return the {@link Expression} to use
*/
Expression getExpression() {
return this.expression;
}
@Override
public String toString() {
return getClass().getSimpleName() + " [Expression="
+ ((this.expression != null) ? this.expression.getExpressionString() : null) + "]";
}
}
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