ChunkUtil.java

/*
 * Digital Audio Access Protocol (DAAP) Library
 * Copyright (C) 2004-2010 Roger Kapsi
 *
 * Licensed 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
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.ardverk.daap.tools;

import java.io.File;
import java.io.FilenameFilter;

import org.ardverk.daap.chunks.AbstractChunk;
import org.ardverk.daap.chunks.Chunk;

public final class ChunkUtil {

    public static final String CHUNK_PACKAGE = Chunk.class.getPackage()
            .getName();
    public static final String CHUNK_IMPL_PACKAGE = CHUNK_PACKAGE + ".impl";

    public static final String CHUNK_DIR = CHUNK_PACKAGE.replace('.',
            File.separatorChar);
    public static final String CHUNK_IMPL_DIR = CHUNK_IMPL_PACKAGE.replace('.',
            File.separatorChar);

    // private static final Map map = new HashMap();

    static {

    }

    private ChunkUtil() {

    }

    public static Chunk[] getChunks() {
        return getChunks(new File(CHUNK_IMPL_DIR));
    }

    public static Chunk[] getChunks(File dir) {
        String[] files = dir.list(new FilenameFilter() {
            public boolean accept(File dir, String name) {
                return name.endsWith(".java");
            }
        });

        Chunk[] chunks = new Chunk[files.length];

        try {
            for (int i = 0; i < files.length; i++) {
                String clazzName = CHUNK_IMPL_PACKAGE
                        + "."
                        + files[i].substring(0, files[i].length()
                                - ".java".length());
                Class clazz = Class.forName(clazzName);

                chunks[i] = (AbstractChunk) clazz.newInstance();
            }
        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        } catch (InstantiationException e) {
            throw new RuntimeException(e);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        }

        return chunks;
    }
}