referencechannelnamefinder.java

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/**
 * Copyright (c) 2002 The JA-SIG Collaborative.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the JA-SIG Collaborative
 *    (http://www.jasig.org/)."
 *
 * THIS SOFTWARE IS PROVIDED BY THE JA-SIG COLLABORATIVE "AS IS" AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE JA-SIG COLLABORATIVE OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 * formatted with JxBeauty (c) [e-mail]
 */


package  org.jasig.portal.groups;

import java.util.HashMap;
import java.util.Map;

import org.jasig.portal.ChannelDefinition;
import org.jasig.portal.ChannelRegistryStoreFactory;
import org.jasig.portal.IChannelRegistryStore;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Reference implementation of <code>IEntityNameFinder</code> for <code>Channels</code>.
 * @author Alex Vigdor
 * @version $Revision: 1.4.2.1 $
 */
public class ReferenceChannelNameFinder
        implements IEntityNameFinder {
    
    private static final Log log = LogFactory.getLog(ReferenceChannelNameFinder.class);
    
    private static IEntityNameFinder _instance = null;
    private Class type = null;

    protected ReferenceChannelNameFinder () {
        try {
            type = Class.forName("org.jasig.portal.ChannelDefinition");
        } catch (Exception e) {
            log.error("Exception instantiating ReferenceChannelNameFinder.", e);
        }
    }

    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 {
        IChannelRegistryStore crs = ChannelRegistryStoreFactory.getChannelRegistryStoreImpl();
        ChannelDefinition cd = crs.getChannelDefinition(Integer.parseInt(key));
        return  cd.getName();
    }

    /**
     * Given an array of keys, returns the names of the entities.
     * @param keys java.lang.String[]
     */
    public Map getNames (String[] keys) throws Exception {
        HashMap names = new HashMap();
        for (int i = 0; i < keys.length; i++) {
            names.put(keys[i], getName(keys[i]));
        }
        return  names;
    }

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