goOnlineWebService.java

package webService;

import java.awt.*;
import java.awt.image.*;
import java.io.*;
import java.util.ResourceBundle;

import com.sun.image.codec.jpeg.*;
import javax.imageio.ImageIO;

import jmatlink.JMatLink;

import org.apache.axis.encoding.Base64;


public class goOnlineWebService {
	// Suitable for Document/Literal (Wrapped) Generation
	// Java -> Document/Literal (Wrapped)
	// C# -> RPC/Encoded
	public static String Code_Dir;
	public static String Image_Dir;
	public static JMatLink jMat;
	
	public void engineOpen() {
		ResourceBundle rb = ResourceBundle.getBundle("MSP");
		Code_Dir = rb.getString("Code_directory");
		Image_Dir = rb.getString("Image_directory");
		jMat = new JMatLink();
		jMat.engOpenSingleUse();
		jMat.engEvalString("cd "+ Code_Dir);	
		System.out.println("MATLAB Server Pages Engine");
	}
	
	public void engineClose() {
		jMat.engClose();
		jMat.kill();
	}
	
	public String thumbnail(String imagename, String width, String height)  {
		// Written by Marco Schmidt
		// Changed for MSP by Ali KIZIL
		try {
			// load image from INFILE
			Image image = Toolkit.getDefaultToolkit().getImage(
					Image_Dir + "\\" + imagename + ".jpg");
			MediaTracker mediaTracker = new MediaTracker(new Container());
			mediaTracker.addImage(image, 0);
			mediaTracker.waitForID(0);

			// determine thumbnail size from WIDTH and HEIGHT
			int thumbWidth = Integer.parseInt(width);
			int thumbHeight = Integer.parseInt(height);
			double thumbRatio = (double) thumbWidth / (double) thumbHeight;
			int imageWidth = image.getWidth(null);
			int imageHeight = image.getHeight(null);
			double imageRatio = (double) imageWidth / (double) imageHeight;
			if (thumbRatio < imageRatio) {
				thumbHeight = (int) (thumbWidth / imageRatio);
			} else {
				thumbWidth = (int) (thumbHeight * imageRatio);
			}

			// draw original image to thumbnail image object and
			// scale it to the new size on-the-fly
			BufferedImage thumbImage = new BufferedImage(thumbWidth,
					thumbHeight, BufferedImage.TYPE_INT_RGB);
			Graphics2D graphics2D = thumbImage.createGraphics();
			graphics2D.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
					RenderingHints.VALUE_INTERPOLATION_BILINEAR);
			graphics2D.drawImage(image, 0, 0, thumbWidth, thumbHeight, null);

			// save thumbnail image to OUTFILE
			BufferedOutputStream out = new BufferedOutputStream(
					new FileOutputStream(Image_Dir + "\\" + imagename
							+ "_tb.jpg"));
			JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
			JPEGEncodeParam param = encoder
					.getDefaultJPEGEncodeParam(thumbImage);
			int quality = Integer.parseInt("100");
			quality = Math.max(0, Math.min(quality, 100));
			param.setQuality((float) quality / 100.0f, false);
			encoder.setJPEGEncodeParam(param);
			encoder.encode(thumbImage);
			out.close();
		} catch (NumberFormatException e) {
			System.out.println("MSP Error: "+e.getMessage());
		} catch (FileNotFoundException e) {
			System.out.println("MSP Error: "+e.getMessage());
		} catch (ImageFormatException e) {
			System.out.println("MSP Error: "+e.getMessage());
		} catch (InterruptedException e) {
			System.out.println("MSP Error: "+e.getMessage());
		} catch (IOException e) {
			System.out.println("MSP Error: "+e.getMessage());
		}
		return (imagename + "_tb.jpg");
	}

	public String imageToString(String filename) {
		// Using Base64 Encoding to serialize image.
		String strPic = null;
		try {
			BufferedImage srcImage = ImageIO.read( new File(filename));
			ByteArrayOutputStream streamIn = new ByteArrayOutputStream();
			ImageIO.write( srcImage , "jpg", streamIn );
			byte[] bytes = streamIn.toByteArray();
			strPic = Base64.encode(bytes);
		} catch (IOException e) {
			System.out.println("MSP Error: "+e.getMessage());
		}
		
		//ByteArrayInputStream streamOut = new ByteArrayInputStream( bytes );
		//BufferedImage writeImage = ImageIO.read( streamOut );
		//ImageIO.write( writeImage, "jpg", new File( pathOut ));        		
		return strPic;
	}

	public void eval(String command){
		jMat.engEvalString(command);		
	}
	
	public double[][] getArray(String var) {
		double[][] array;
		array = jMat.engGetArray(var);
		return array;
	}
	
	public double[] getVector(String var) {
		double[][] array;
		double[] vector;
		array = jMat.engGetArray(var);
		vector = array[0];
		return vector;
	}
	
	public double getScalar(String var) {
		double scalar;
		scalar = jMat.engGetScalar(var);
		return scalar;
	}
	
	public String[] getString(String var) {
		String[] str;
		str = jMat.engGetCharArray(var);
		return str;
	}
	
	public void putArray(String var, double[][] value) {
		jMat.engPutArray(var,value);
	}
	
	public void putVector(String var, double[] value) {
		jMat.engPutArray(var,value);
	}
	
	public void putScalar(String var, double value) {
		jMat.engPutArray(var,value);		
	}
	
	public String getImage(String command, String name, String width, String height) {
		jMat.engEvalString(command);
		jMat.engEvalString("saveas(gcf,'"+name+"','jpg')");
		jMat.engEvalString("movefile('"+name+".jpg','"+Image_Dir+"','f')");
		
		thumbnail(name,width,height);
		
		return imageToString(Image_Dir + "\\" + name + "_tb.jpg");
	}
	
}