dk.netdesign.common.osgi.config.osgi.OCD.java Source code

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Here is the source code for dk.netdesign.common.osgi.config.osgi.OCD.java

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package dk.netdesign.common.osgi.config.osgi;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import javax.imageio.ImageIO;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.osgi.service.metatype.ObjectClassDefinition;

/**
 * The OCD is a subtype of ObjectClassDefinition and is responsible for storing both the information needed by ConfigurationAdmin and MetaTypeProvider
 * @author mnn
 */
public class OCD implements ObjectClassDefinition {

    private String description;
    private String name;
    // Represents the attributes of this object class
    private MetaTypeAttributeDefinition[] requiredADs;
    private String id;
    private File iconFile;

    protected OCD(String id, MetaTypeAttributeDefinition[] requiredADs) {
        this.id = id;
        this.requiredADs = requiredADs;
    }

    @Override
    public MetaTypeAttributeDefinition[] getAttributeDefinitions(int filter) {
        if (filter == ObjectClassDefinition.OPTIONAL) {
            return null;
        }
        return requiredADs;
    }

    @Override
    public String getDescription() {
        return description;
    }

    @Override
    public InputStream getIcon(int iconDimension) throws IOException {
        BufferedImage img = null;
        img = ImageIO.read(iconFile);

        BufferedImage resizedImage = scaleImage(img, iconDimension, iconDimension, Color.DARK_GRAY);

        ByteArrayOutputStream os = new ByteArrayOutputStream();
        ImageIO.write(resizedImage, "jpg", os);
        return new ByteArrayInputStream(os.toByteArray());

    }

    @Override
    public String getID() {
        return id;
    }

    @Override
    public String getName() {
        return name;
    }

    protected void setName(String name) {
        this.name = name;
    }

    protected void setDescription(String description) {
        this.description = description;
    }

    protected void setIconFile(File iconFile) {
        this.iconFile = iconFile;
    }

    public BufferedImage scaleImage(BufferedImage img, int width, int height, Color background) {
        int imgWidth = img.getWidth();
        int imgHeight = img.getHeight();
        if (imgWidth * height < imgHeight * width) {
            width = imgWidth * height / imgHeight;
        } else {
            height = imgHeight * width / imgWidth;
        }
        BufferedImage newImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics2D g = newImage.createGraphics();
        try {
            g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
            g.setBackground(background);
            g.clearRect(0, 0, width, height);
            g.drawImage(img, 0, 0, width, height, null);
        } finally {
            g.dispose();
        }
        return newImage;
    }

    public MetaTypeAttributeDefinition[] getRequiredADs() {
        return requiredADs;
    }

    @Override
    public String toString() {
        ToStringBuilder builder = new ToStringBuilder(this);
        builder.append("id", id).append("name", name).append("description", description)
                .append("iconFile", iconFile).append("ADs", requiredADs);
        return builder.toString();
    }
}