spring security AbstractExpressionBasedMethodConfigAttribute 源码
spring security AbstractExpressionBasedMethodConfigAttribute 代码
文件路径：/core/src/main/java/org/springframework/security/access/expression/method/AbstractExpressionBasedMethodConfigAttribute.java
/*
* Copyright 2002-2016 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.method;
import org.springframework.expression.Expression;
import org.springframework.expression.ParseException;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.util.Assert;
/**
* Contains both filtering and authorization expression meta-data for Spring-EL based
* access control.
* <p>
* Base class for pre or post-invocation phases of a method invocation.
* <p>
* Either filter or authorization expressions may be null, but not both.
*
* @author Luke Taylor
* @since 3.0
*/
abstract class AbstractExpressionBasedMethodConfigAttribute implements ConfigAttribute {
private final Expression filterExpression;
private final Expression authorizeExpression;
/**
* Parses the supplied expressions as Spring-EL.
*/
AbstractExpressionBasedMethodConfigAttribute(String filterExpression, String authorizeExpression)
throws ParseException {
Assert.isTrue(filterExpression != null || authorizeExpression != null,
"Filter and authorization Expressions cannot both be null");
SpelExpressionParser parser = new SpelExpressionParser();
this.filterExpression = (filterExpression != null) ? parser.parseExpression(filterExpression) : null;
this.authorizeExpression = (authorizeExpression != null) ? parser.parseExpression(authorizeExpression) : null;
}
AbstractExpressionBasedMethodConfigAttribute(Expression filterExpression, Expression authorizeExpression)
throws ParseException {
Assert.isTrue(filterExpression != null || authorizeExpression != null,
"Filter and authorization Expressions cannot both be null");
this.filterExpression = (filterExpression != null) ? filterExpression : null;
this.authorizeExpression = (authorizeExpression != null) ? authorizeExpression : null;
}
Expression getFilterExpression() {
return this.filterExpression;
}
Expression getAuthorizeExpression() {
return this.authorizeExpression;
}
@Override
public String getAttribute() {
return null;
}
}
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