spring security Jsr250Voter 源码
spring security Jsr250Voter 代码
文件路径：/core/src/main/java/org/springframework/security/access/annotation/Jsr250Voter.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.annotation;
import java.util.Collection;
import org.springframework.security.access.AccessDecisionVoter;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
/**
* Voter on JSR-250 configuration attributes.
*
* @author Ryan Heaton
* @since 2.0
*/
public class Jsr250Voter implements AccessDecisionVoter<Object> {
/**
* The specified config attribute is supported if its an instance of a
* {@link Jsr250SecurityConfig}.
* @param configAttribute The config attribute.
* @return whether the config attribute is supported.
*/
@Override
public boolean supports(ConfigAttribute configAttribute) {
return configAttribute instanceof Jsr250SecurityConfig;
}
/**
* All classes are supported.
* @param clazz the class.
* @return true
*/
@Override
public boolean supports(Class<?> clazz) {
return true;
}
/**
* Votes according to JSR 250.
* <p>
* If no JSR-250 attributes are found, it will abstain, otherwise it will grant or
* deny access based on the attributes that are found.
* @param authentication The authentication object.
* @param object The access object.
* @param definition The configuration definition.
* @return The vote.
*/
@Override
public int vote(Authentication authentication, Object object, Collection<ConfigAttribute> definition) {
boolean jsr250AttributeFound = false;
for (ConfigAttribute attribute : definition) {
if (Jsr250SecurityConfig.PERMIT_ALL_ATTRIBUTE.equals(attribute)) {
return ACCESS_GRANTED;
}
if (Jsr250SecurityConfig.DENY_ALL_ATTRIBUTE.equals(attribute)) {
return ACCESS_DENIED;
}
if (supports(attribute)) {
jsr250AttributeFound = true;
// Attempt to find a matching granted authority
for (GrantedAuthority authority : authentication.getAuthorities()) {
if (attribute.getAttribute().equals(authority.getAuthority())) {
return ACCESS_GRANTED;
}
}
}
}
return jsr250AttributeFound ? ACCESS_DENIED : ACCESS_ABSTAIN;
}
}
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