spring-session PrincipalNameIndexResolver 源码
spring-session PrincipalNameIndexResolver 代码
文件路径：/spring-session-core/src/main/java/org/springframework/session/PrincipalNameIndexResolver.java
/*
* Copyright 2014-2019 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.session;
import org.springframework.expression.Expression;
import org.springframework.expression.spel.standard.SpelExpressionParser;
/**
* {@link IndexResolver} to resolve the principal name from session attribute named
* {@link FindByIndexNameSessionRepository#PRINCIPAL_NAME_INDEX_NAME} or Spring Security
* context stored in the session under {@code SPRING_SECURITY_CONTEXT} attribute.
*
* @param <S> the type of Session being handled
* @author Vedran Pavic
* @since 2.2.0
*/
public class PrincipalNameIndexResolver<S extends Session> extends SingleIndexResolver<S> {
private static final String SPRING_SECURITY_CONTEXT = "SPRING_SECURITY_CONTEXT";
private static final Expression expression = new SpelExpressionParser().parseExpression("authentication?.name");
public PrincipalNameIndexResolver() {
super(FindByIndexNameSessionRepository.PRINCIPAL_NAME_INDEX_NAME);
}
public String resolveIndexValueFor(S session) {
String principalName = session.getAttribute(getIndexName());
if (principalName != null) {
return principalName;
}
Object authentication = session.getAttribute(SPRING_SECURITY_CONTEXT);
if (authentication != null) {
return expression.getValue(authentication, String.class);
}
return null;
}
}
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