import java.awt.image.BufferedImage;
import java.awt.Image;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;
import javax.imageio.ImageWriteParam;
import javax.imageio.stream.ImageOutputStream;

public class ImageWriterTest4 extends ImageWriterTest1 {
    public ImageWriterTest4(String sourceFile, String destinationFile, float quality) {
        super();

        BufferedImage image = readImage(sourceFile);
        writeImage(image, destinationFile, quality);
    }

    protected void writeImage(BufferedImage image, String filename, float quality) {
        Iterator writers = ImageIO.getImageWritersBySuffix(getSuffix(filename));
        
        if (writers.hasNext()) {
            ImageWriter writer = (ImageWriter)writers.next();

            try {
                ImageOutputStream stream = ImageIO.createImageOutputStream(new File(filename));
                writer.setOutput(stream);

                ImageWriteParam param = writer.getDefaultWriteParam();
                if (param.canWriteCompressed()) {
                    param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
                    param.setCompressionQuality(quality);
                } else {
                    System.out.println("Compression is not supported.");
                }

                writer.write(null, new IIOImage(image, null, null), param);
                writer.dispose();

                return;
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }
    
    public static void main(String[] args) {
        if (args.length == 3) {
            new ImageWriterTest4(args[0], args[1], Float.parseFloat(args[2]));
        } else {
            System.out.println("Usage: java ImageWriterTest4 <source filename> <destination filename> <quality>");
        }
    }
}