/*
 * Copyright (c) 2012, the Last.fm Java Project and Committers All rights
 * reserved. Redistribution and use of this software in source and binary forms,
 * with or without modification, are permitted provided that the following
 * conditions are met: - Redistributions of source code must retain the above
 * copyright notice, this list of conditions and the following disclaimer. -
 * 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. THIS SOFTWARE IS
 * PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS 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 COPYRIGHT OWNER OR 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.
 */

package com.andrew.apollo.lastfm;

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

/**
 * The <code>ItemFactoryBuilder</code> can be used to obtain {@link ItemFactory
 * ItemFactories} for a specific type.
 * 
 * @author Janni Kovacs
 * @see ItemFactory
 */
final class ItemFactoryBuilder {

    private final static ItemFactoryBuilder INSTANCE = new ItemFactoryBuilder();

    @SuppressWarnings("rawtypes")
    private final Map<Class, ItemFactory> factories = new HashMap<Class, ItemFactory>();

    private ItemFactoryBuilder() {
        // register default factories
        addItemFactory(Album.class, Album.FACTORY);
        addItemFactory(Artist.class, Artist.FACTORY);
        addItemFactory(Image.class, Image.FACTORY);
    }

    /**
     * Retrieve the instance of the <code>ItemFactoryBuilder</code>.
     * 
     * @return the instance
     */
    public static ItemFactoryBuilder getFactoryBuilder() {
        return INSTANCE;
    }

    /**
     * @param <T>
     * @param itemClass
     * @param factory
     */
    public <T> void addItemFactory(final Class<T> itemClass, final ItemFactory<T> factory) {
        factories.put(itemClass, factory);
    }

    /**
     * Retrieves an {@link ItemFactory} for the given type, or <code>null</code>
     * if no such factory was registered.
     * 
     * @param itemClass the type's Class object
     * @return the <code>ItemFactory</code> or <code>null</code>
     */
    @SuppressWarnings("unchecked")
    public <T> ItemFactory<T> getItemFactory(final Class<T> itemClass) {
        return factories.get(itemClass);
    }
}
