/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * 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 the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>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.apereo.portal.groups;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apereo.portal.services.GroupService;

/**
 * Reference implementation of <code>IEntityNameFinder</code> for <code>IEntityGroup</code>.
 *
 */
public class EntityGroupNameFinder implements IEntityNameFinder {
    private static final Log log = LogFactory.getLog(EntityGroupNameFinder.class);
    private static IEntityNameFinder _instance = null;
    private Class type = null;

    protected EntityGroupNameFinder() {
        try {
            type = Class.forName("org.apereo.portal.groups.IEntityGroup");
        } catch (Exception e) {
            log.error(e, e);
        }
    }

    public static synchronized IEntityNameFinder singleton() {
        if (_instance == null) {
            _instance = new EntityGroupNameFinder();
        }
        return _instance;
    }

    /**
     * Given the key, returns the entity's name.
     *
     * @param key java.lang.String
     */
    public String getName(String key) throws Exception {
        IEntityGroup g = GroupService.findGroup(key);
        return g.getName();
    }

    /**
     * Returns the entity type for this <code>IEntityFinder</code>.
     *
     * @return java.lang.Class
     */
    public Class getType() {
        return type;
    }
}