web.diva.server.model.GroupColorUtil.java Source code

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Here is the source code for web.diva.server.model.GroupColorUtil.java

Source

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package web.diva.server.model;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import javax.imageio.ImageIO;
import org.apache.commons.codec.binary.Base64;

/**
 *
 * @author Yehia Farag
 */
public class GroupColorUtil {

    public GroupColorUtil() {
    }

    public synchronized String getImageColor(String hashColor, String path, String colName) {
        try {
            Color color = hex2Rgb(hashColor);
            BufferedImage image = new BufferedImage(8, 9, BufferedImage.TYPE_INT_RGB);
            Graphics2D graphics = image.createGraphics();
            graphics.setBackground(color);
            graphics.setColor(color);
            graphics.fillRect(0, 0, image.getWidth(), image.getHeight());
            File f = new File(path, colName + ".png");
            if (!f.exists()) {
                f.createNewFile();
            }

            ImageIO.write(image, "PNG", f);
            // Reading a Image file from file system
            FileInputStream imageInFile = new FileInputStream(f);
            byte imageData[] = new byte[(int) f.length()];
            imageInFile.read(imageData);
            String base64 = Base64.encodeBase64String(imageData);
            base64 = "data:image/png;base64," + base64;

            return base64;
        } catch (IOException ioexp) {
            System.err.println(ioexp.getMessage());
        }
        return null;
    }

    /**
     *
     * @param colorStr e.g. "#FFFFFF"
     * @return
     */
    private Color hex2Rgb(String colorStr) {
        return new Color(Integer.valueOf(colorStr.substring(1, 3), 16),
                Integer.valueOf(colorStr.substring(3, 5), 16), Integer.valueOf(colorStr.substring(5, 7), 16));
    }

}