LdapService.java

/**
 * Copyright (c) Codice Foundation
 * <p>
 * This is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser
 * General Public License as published by the Free Software Foundation, either version 3 of the
 * License, or any later version.
 * <p>
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details. A copy of the GNU Lesser General Public License
 * is distributed along with this program and can be found at
 * <http://www.gnu.org/licenses/lgpl.html>.
 */
package ddf.ldap.ldaplogin;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.apache.karaf.jaas.config.JaasRealm;
import org.apache.karaf.jaas.config.impl.Config;
import org.apache.karaf.jaas.config.impl.Module;
import org.osgi.framework.BundleContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class LdapService {

    private static final Logger LOGGER = LoggerFactory.getLogger(LdapService.class);

    private static final String CONFIG_NAME = "ldap";

    private Config config;

    private List<Module> modules;

    public LdapService(final BundleContext context) {
        config = new Config();
        modules = new ArrayList<>();
        config.setBundleContext(context);
        config.setName(CONFIG_NAME);
        config.setRank(2);
        config.setModules(new Module[] {});

        LOGGER.debug("Registering new service as a JaasRealm.");
        context.registerService(JaasRealm.class, config, null);
    }

    /**
     * Updates an existing ldap module with a new one or adds a
     * new module to the list of existing modules.
     *
     * @param newModule that will replace a module or be added to the list of modules.
     */
    public synchronized void update(Module newModule) {
        modules.removeIf(m -> m.getName()
                .equals(newModule.getName()));
        modules.add(newModule);
        config.setModules(modules.toArray(new Module[modules.size()]));
    }

    /**
     * Delete an ldap module given its id.
     *
     * @param id of the module.
     * @return true, if the delete was successful, false otherwise.
     */
    public synchronized boolean delete(String id) {
        int initSize = modules.size();
        modules.removeIf(m -> m.getName()
                .equals(id));
        config.setModules(modules.toArray(new Module[modules.size()]));
        return initSize > modules.size();
    }

    /**
     * Return the list of created ldap modules.
     *
     * @return list of modules.
     */
    synchronized List<Module> getModules() {
        return Collections.unmodifiableList(this.modules);
    }
}