ImageMediaAccessor.java

package lancs.mobilemedia.core.ui.datamodel;
import javax.microedition.lcdui.Image;
import javax.microedition.rms.RecordStoreException;
import lancs.mobilemedia.core.util.MediaUtil;
import lancs.mobilemedia.lib.exceptions.ImagePathNotValidException;
import lancs.mobilemedia.lib.exceptions.InvalidArrayFormatException;
import lancs.mobilemedia.lib.exceptions.InvalidImageDataException;
import lancs.mobilemedia.lib.exceptions.InvalidImageFormatException;
import lancs.mobilemedia.lib.exceptions.PersistenceMechanismException;
import de.ovgu.cide.jakutil.*;
public class ImageMediaAccessor extends MediaAccessor {
  private MediaUtil converter=new MediaUtil();
  public ImageMediaAccessor(  AlbumData mod){
    super("mpa-","mpi-","My Photo Album");
  }
  /** 
 * Reset the album data for MobilePhoto. This will delete all existing photo
 * data from the record store and re-create the default album and photos.
 * @throws InvalidImageFormatException
 * @throws ImagePathNotValidException
 * @throws InvalidImageDataException
 * @throws PersistenceMechanismException
 */
  public void resetRecordStore() throws InvalidImageDataException, PersistenceMechanismException {
    removeRecords();
    addMediaData("Tucan Sam","/images/Tucan.png",default_album_name);
    addMediaData("Java","/images/Java.png",default_album_name);
    addMediaData("Linux Penguin","/images/Penguin.png",default_album_name);
    addMediaData("Duke (Sun)","/images/Duke1.PNG",default_album_name);
    addMediaData("UBC Logo","/images/ubcLogo.PNG",default_album_name);
    addMediaData("Gail","/images/Gail1.PNG",default_album_name);
    addMediaData("J. Gosling","/images/Gosling1.PNG",default_album_name);
    addMediaData("Gregor","/images/Gregor1.PNG",default_album_name);
    addMediaData("Kris","/images/Kdvolder1.PNG",default_album_name);
  }
  protected byte[] getMediaArrayOfByte(  String path) throws ImagePathNotValidException, InvalidImageFormatException {
    byte[] data1=converter.readMediaAsByteArray(path);
    return data1;
  }
  protected byte[] getByteFromMediaInfo(  MediaData ii) throws InvalidImageDataException {
    return converter.getBytesFromMediaInfo(ii);
  }
  protected MediaData getMediaFromBytes(  byte[] data) throws InvalidArrayFormatException {
    MediaData iiObject=converter.getMediaInfoFromBytes(data);
    return iiObject;
  }
  /** 
 * Fetch a single image from the Record Store This should be used for
 * loading images on-demand (only when they are viewed or sent via SMS etc.)
 * to reduce startup time by loading them all at once.
 * @throws PersistenceMechanismException 
 */
  public Image loadSingleImageFromRMS(  String recordName,  int recordId) throws PersistenceMechanismException {
    Image img=null;
    byte[] imageData=loadMediaBytesFromRMS(recordName,recordId);
    img=Image.createImage(imageData,0,imageData.length);
    return img;
  }
}