org.acegisecurity.vote.RoleVoter Maven / Gradle / Ivy
/* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
*
* 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
*
* http://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.acegisecurity.vote;
import java.util.Iterator;
import org.acegisecurity.Authentication;
import org.acegisecurity.ConfigAttribute;
import org.acegisecurity.ConfigAttributeDefinition;
/**
*
* Votes if any {@link ConfigAttribute#getAttribute()} starts with a prefix
* indicating that it is a role. The default prefix string is ROLE_,
* but this may be overriden to any value. It may also be set to empty, which
* means that essentially any attribute will be voted on. As described further
* below, the effect of an empty prefix may not be quite desireable.
*
*
* Abstains from voting if no configuration attribute commences with the role
* prefix. Votes to grant access if there is an exact matching
* {@link org.acegisecurity.GrantedAuthority} to a ConfigAttribute
* starting with the role prefix. Votes to deny access if there is no exact
* matching GrantedAuthority to a ConfigAttribute
* starting with the role prefix.
*
*
* An empty role prefix means that the voter will vote for every
* ConfigAttribute. When there are different categories of ConfigAttributes
* used, this will not be optimal since the voter will be voting for attributes
* which do not represent roles. However, this option may be of some use when
* using preexisting role names without a prefix, and no ability exists to
* prefix them with a role prefix on reading them in, such as provided for
* example in {@link org.acegisecurity.userdetails.jdbc.JdbcDaoImpl}.
*
*
* All comparisons and prefixes are case sensitive.
*
*
* @author Ben Alex
* @author colin sampaleanu
* @version $Id: RoleVoter.java 1948 2007-08-25 00:15:30Z benalex $
*/
public class RoleVoter implements AccessDecisionVoter {
// ~ Instance fields
// ================================================================================================
private String rolePrefix = "ROLE_";
// ~ Methods
// ========================================================================================================
public String getRolePrefix() {
return rolePrefix;
}
/**
* Allows the default role prefix of ROLE_ to be overriden.
* May be set to an empty value, although this is usually not desireable.
*
* @param rolePrefix the new prefix
*/
public void setRolePrefix(String rolePrefix) {
this.rolePrefix = rolePrefix;
}
public boolean supports(ConfigAttribute attribute) {
if ((attribute.getAttribute() != null) && attribute.getAttribute().startsWith(getRolePrefix())) {
return true;
}
else {
return false;
}
}
/**
* This implementation supports any type of class, because it does not query
* the presented secure object.
*
* @param clazz the secure object
*
* @return always true
*/
public boolean supports(Class clazz) {
return true;
}
public int vote(Authentication authentication, Object object, ConfigAttributeDefinition config) {
int result = ACCESS_ABSTAIN;
Iterator iter = config.getConfigAttributes();
while (iter.hasNext()) {
ConfigAttribute attribute = (ConfigAttribute) iter.next();
if (this.supports(attribute)) {
result = ACCESS_DENIED;
// Attempt to find a matching granted authority
for (int i = 0; i < authentication.getAuthorities().length; i++) {
if (attribute.getAttribute().equals(authentication.getAuthorities()[i].getAuthority())) {
return ACCESS_GRANTED;
}
}
}
}
return result;
}
}