package org.jaudiotagger.tag.asf;

 import org.jaudiotagger.audio.asf.data.MetadataDescriptor;

 import org.jaudiotagger.tag.asf.AsfTagField;

 import org.jaudiotagger.tag.asf.AsfFieldKey;

 import org.jaudiotagger.tag.TagField;

 import javax.imageio.ImageIO;

 import java.awt.image.BufferedImage;

 import java.io.ByteArrayInputStream;

 import java.io.IOException;

 /**

  * An <code>AbstractAsfTagImageField</code> is an abstract class for representing tag

  * fields containing image data.<br>

  * 

  * @author Christian Laireiter

  */

 abstract class AbstractAsfTagImageField extends AsfTagField

 {

     /**

      * Creates a image tag field.

      * 

      * @param field

      *            the ASF field that should be represented.

      */

     public AbstractAsfTagImageField(final AsfFieldKey field) {

         super(field);

     }

     /**

      * Creates an instance.

      * 

      * @param source

      *            The descriptor which should be represented as a

      *            {@link TagField}.

      */

     public AbstractAsfTagImageField(final MetadataDescriptor source) {

         super(source);

     }

     /**

      * Creates a tag field.

      * 

      * @param fieldKey

      *            The field identifier to use.

      */

     public AbstractAsfTagImageField(final String fieldKey) {

         super(fieldKey);

     }

     /**

      * This method returns an image instance from the

      * {@linkplain #getRawImageData() image content}.

      * 

      * @return the image instance

      * @throws IOException

      */

     public BufferedImage getImage() throws IOException {

         return ImageIO.read(new ByteArrayInputStream(getRawImageData()));

     }

     /**

      * Returns the size of the {@linkplain #getRawImageData() image data}.<br>

      * 

      * @return image data size in bytes.

      */

     public abstract int getImageDataSize();

     /**

      * Returns the raw data of the represented image.<br>

      * 

      * @return raw image data

      */

     public abstract byte[] getRawImageData();

 }