org.unitime.timetable.spring.ldap.SpringLdapExternalUidTranslation.java Source code

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Here is the source code for org.unitime.timetable.spring.ldap.SpringLdapExternalUidTranslation.java

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/*
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.
 *
 * The Apereo Foundation licenses this file to you 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.unitime.timetable.spring.ldap;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.ldap.core.ContextSource;
import org.springframework.ldap.core.DirContextOperations;
import org.springframework.security.ldap.SpringSecurityLdapTemplate;
import org.unitime.timetable.defaults.ApplicationProperty;
import org.unitime.timetable.interfaces.ExternalUidTranslation;
import org.unitime.timetable.spring.SpringApplicationContextHolder;

/**
 * @author Tomas Muller
 */
public class SpringLdapExternalUidTranslation implements ExternalUidTranslation {
    private static Log sLog = LogFactory.getLog(SpringLdapExternalUidTranslation.class);

    public String translate(String uid, Source source, Source target) {
        if (uid == null || source.equals(target))
            return uid;
        if (source.equals(Source.LDAP))
            return uid2ext(uid);
        if (target.equals(Source.LDAP))
            return ext2uid(uid);
        return uid;
    }

    public String uid2ext(String uid) {
        String externalIdAttribute = ApplicationProperty.AuthenticationLdapIdAttribute.value();
        if ("uid".equals(externalIdAttribute))
            return uid; // Nothing to translate
        try {

            ContextSource source = (ContextSource) SpringApplicationContextHolder
                    .getBean("unitimeLdapContextSource");

            String query = ApplicationProperty.AuthenticationLdapLogin2UserId.value();

            SpringSecurityLdapTemplate template = new SpringSecurityLdapTemplate(source);
            DirContextOperations user = template.retrieveEntry(query.replaceAll("\\{0\\}", uid),
                    new String[] { externalIdAttribute });

            return user == null ? null : user.getStringAttribute(externalIdAttribute);

        } catch (Exception e) {
            sLog.warn("Unable to translate uid to " + externalIdAttribute + ": " + e.getMessage());
        }

        return null;
    }

    public String ext2uid(String externalUserId) {
        String externalIdAttribute = ApplicationProperty.AuthenticationLdapIdAttribute.value();
        if ("uid".equals(externalIdAttribute))
            return externalUserId; // Nothing to translate
        try {

            ContextSource source = (ContextSource) SpringApplicationContextHolder
                    .getBean("unitimeLdapContextSource");

            String query = ApplicationProperty.AuthenticationLdapUserId2Login.value().replace("%",
                    externalIdAttribute);

            SpringSecurityLdapTemplate template = new SpringSecurityLdapTemplate(source);
            DirContextOperations user = template.retrieveEntry(query.replaceAll("\\{0\\}", externalIdAttribute),
                    new String[] { "uid" });

            return user == null ? null : user.getStringAttribute("uid");

        } catch (Exception e) {
            sLog.warn("Unable to translate " + externalIdAttribute + " to uid: " + e.getMessage());
        }
        return null;
    }
}