/**
 * 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.lang.StringUtils;
import org.apereo.portal.IBasicEntity;
import org.apereo.portal.portlet.om.IPortletDefinition;
import org.apereo.portal.portlet.registry.IPortletDefinitionRegistry;
import org.apereo.portal.spring.locator.PortletDefinitionRegistryLocator;

/**
 * Reference implementation of <code>IEntityNameFinder</code> for <code>Channels</code>.
 *
 */
public class ReferenceChannelNameFinder implements IEntityNameFinder {

    private static IEntityNameFinder _instance = null;
    private final Class<? extends IBasicEntity> type = IPortletDefinition.class;

    protected ReferenceChannelNameFinder() {}

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

    /**
     * Given the key, returns the entity's name.
     *
     * @param key java.lang.String
     */
    public String getName(String key) throws Exception {
        IPortletDefinitionRegistry registry =
                PortletDefinitionRegistryLocator.getPortletDefinitionRegistry();

        IPortletDefinition portletDefinition;
        if (StringUtils.isNumeric(key)) {
            portletDefinition = registry.getPortletDefinition(key);
        } else {
            portletDefinition = registry.getPortletDefinition(key.split("\\.")[1]);
        }
        return portletDefinition.getName();
    }

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