Another way to use play-morphia blobs

gistfile1.java

package models;

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;

import javax.imageio.ImageIO;

import play.libs.MimeTypes;
import play.modules.morphia.Blob;
import play.modules.morphia.Model;
import play.modules.morphia.MorphiaPlugin;
import utils.ImageUtils;

import com.google.code.morphia.annotations.Entity;
import com.mongodb.gridfs.GridFSDBFile;
import com.mongodb.gridfs.GridFSInputFile;

/**
 * You must think of ImageBlob of an immutable object. 
 * Once created you cannot really modify it. 
 * 
 * @author hansi
 */
@Entity
public class ImageBlob extends Model{
	// the original filename
	public String filename;
	
	// the original image data ... 
	public Blob data;
	
	
	public ImageBlob(){
		
	}
	
	public ImageBlob( InputStream body, String filename ){
		this.filename = filename;
		data = new Blob( body, MimeTypes.getContentType( filename ) );
	}

	public GridFSDBFile asAvatar(){
		// Is there already a file for this?
		String filename = getId().toString() + "_avatar"; 
		GridFSDBFile avatar = MorphiaPlugin.gridFs().findOne( filename );
		
		if( avatar != null ){
			return avatar; 
		}
		else{
			try {
				BufferedImage originalImage = ImageIO.read( data.getGridFSFile().getInputStream() );
				BufferedImage avatarImage = ImageUtils.generateAvatar( originalImage );
				InputStream in = ImageUtils.toInputStream( avatarImage, "png" ); 
				
				GridFSInputFile input = MorphiaPlugin.gridFs().createFile( in, filename );
				System.out.println( "name = " + filename ); 
				input.save(); 
				
				return MorphiaPlugin.gridFs().findOne( filename ); 
			}
			catch (IOException e) {
				e.printStackTrace();
				return null; 
			} 
		}
	}

	public GridFSDBFile asPanorama(){
		// Is there already a file for this?
		String filename = getId().toString() + "_panorama"; 
		GridFSDBFile panorama = MorphiaPlugin.gridFs().findOne( filename );
		
		if( panorama != null ){
			return panorama; 
		}
		else{
			try {
				BufferedImage originalImage = ImageIO.read( data.getGridFSFile().getInputStream() );
				BufferedImage avatarImage = ImageUtils.fit( originalImage, 500, 350 );
				InputStream in = ImageUtils.toInputStream( avatarImage, "jpg" ); 
				
				GridFSInputFile input = MorphiaPlugin.gridFs().createFile( in, filename );
				System.out.println( "name = " + filename ); 
				input.save(); 
				
				return MorphiaPlugin.gridFs().findOne( filename ); 
			}
			catch (IOException e) {
				e.printStackTrace();
				return null; 
			} 
		}
	}
}





package models;

import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

import play.data.binding.Global;
import play.data.binding.TypeBinder;

/**
 * This is a HUGE HUGE help! 
 * It allows you to pass in morphia references to image blobs via get/post parameters, 
 * e.g. you could pass 
 * http://host:9000/my/action?obj.title=test&obj.images=4e91eb53804cc3de71a46703&obj.images=4e91edcd804cc3de71a46711
 * 
 * then the vcard should be properly initiated with a list of imageblobs
 *  
 * @author hansi
 *
 */
@Global
public class ImageBlobBinder implements TypeBinder<ImageBlob>{
 
	@Override
	public Object bind(String name, Annotation[] annotations, String value,
			Class actualClass, Type genericType) throws Exception {
		return ImageBlob.findById( value ); 
	}
}