Artwork.java

/*
 *  Copyright (C) 2011 in-somnia
 * 
 *  This file is part of JAAD.
 * 
 *  JAAD is free software; you can redistribute it and/or modify it 
 *  under the terms of the GNU Lesser General Public License as 
 *  published by the Free Software Foundation; either version 3 of the 
 *  License, or (at your option) any later version.
 *
 *  JAAD is distributed in the hope that it will be useful, but WITHOUT 
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
 *  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General 
 *  Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library.
 *  If not, see <http://www.gnu.org/licenses/>.
 */
package net.sourceforge.jaad.mp4.api;

import java.awt.Image;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import net.sourceforge.jaad.mp4.boxes.impl.meta.ITunesMetadataBox.DataType;

public class Artwork {

	//TODO: need this enum? it just copies the DataType
	public enum Type {

		GIF, JPEG, PNG, BMP;

		static Type forDataType(DataType dataType) {
			Type type;
			switch(dataType) {
				case GIF:
					type = GIF;
					break;
				case JPEG:
					type = JPEG;
					break;
				case PNG:
					type = PNG;
					break;
				case BMP:
					type = BMP;
					break;
				default:
					type = null;
			}
			return type;
		}
	}
	private Type type;
	private byte[] data;
	private Image image;

	Artwork(Type type, byte[] data) {
		this.type = type;
		this.data = data;
	}

	/**
	 * Returns the type of data in this artwork.
	 *
	 * @see Type
	 * @return the data's type
	 */
	public Type getType() {
		return type;
	}

	/**
	 * Returns the encoded data of this artwork.
	 *
	 * @return the encoded data
	 */
	public byte[] getData() {
		return data;
	}

	/**
	 * Returns the decoded image, that can be painted.
	 *
	 * @return the decoded image
	 * @throws IOException if decoding fails
	 */
	public Image getImage() throws IOException {
		try {
			if(image==null) image = ImageIO.read(new ByteArrayInputStream(data));
			return image;
		}
		catch(IOException e) {
			Logger.getLogger("MP4 API").log(Level.SEVERE, "Artwork.getImage failed: {0}", e.toString());
			throw e;
		}
	}
}