source: branches/TaskRewrite/src/plugins/acegi-0.5.1/src/groovy/org/codehaus/groovy/grails/plugins/springsecurity/ldap/GrailsLdapUserDetailsMapper.groovy @ 58

/* Copyright 2006-2009 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
 *
 *      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.codehaus.groovy.grails.plugins.springsecurity.ldap

import org.codehaus.groovy.grails.plugins.springsecurity.ldap.GrailsLdapUser

import org.springframework.ldap.core.DirContextOperations
import org.springframework.security.GrantedAuthority
import org.springframework.security.userdetails.UserDetails
import org.springframework.security.userdetails.ldap.LdapUserDetails
import org.springframework.security.userdetails.ldap.LdapUserDetailsMapper

/**
 * Extends the default to return a {@link GrailsLdapUser} implementing
 * both {@link GrailsUser} and {@link LdapUserDetails}.
 *
 * @author <a href='mailto:beckwithb@studentsonly.com'>Burt Beckwith</a>
 */
class GrailsLdapUserDetailsMapper extends LdapUserDetailsMapper {

        /**
         * Dependency injection for the user details service.
         */
        def userDetailsService

        /**
         * Dependency injection for whether to use passwords retrieved from LDAP.
         */
        boolean usePassword

        /**
         * Dependency injection for whether to retrieve roles from the database in addition to LDAP
         */
        boolean retrieveDatabaseRoles

        /**
         * {@inheritDoc}
         * @see org.springframework.security.userdetails.ldap.LdapUserDetailsMapper#mapUserFromContext(
         *      org.springframework.ldap.core.DirContextOperations, java.lang.String,
         *      org.springframework.security.GrantedAuthority[])
         */
        @Override
        UserDetails mapUserFromContext(DirContextOperations ctx, String username, GrantedAuthority[] authorities) {

                def dbDetails = userDetailsService.loadUserByUsername(username, retrieveDatabaseRoles)
                authorities = mergeDatabaseRoles(dbDetails, authorities)

                LdapUserDetails ldapDetails = (LdapUserDetails)super.mapUserFromContext(ctx, username, authorities)
                if (usePassword) {
                        return new GrailsLdapUser(ldapDetails, dbDetails.domainClass)
                }

                // use a dummy password to avoid an exception from the User base class
                return new GrailsLdapUser(details.username, 'not_used', details.enabled,
                                details.accountNonExpired, details.credentialsNonExpired,
                                details.accountNonLocked, details.authorities,
                                details.attributes, details.dn, dbDetails.domainClass)
        }

        private GrantedAuthority[] mergeDatabaseRoles(details, GrantedAuthority[] authorities) {
                List merged = []
                if (authorities) {
                        merged.addAll(authorities as List)
                }

                if (details.authorities) {
                        merged.addAll(details.authorities as List)
                }

                return merged as GrantedAuthority[]
        }
}