initial commit

[kaka/cakelight.git] / src / kaka / cakelight / Configuration.java

package kaka.cakelight;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.*;
import java.util.stream.Collectors;

public class Configuration {
    private List<Map.Entry<String, String>> settings = new ArrayList<>();
    public VideoConfiguration video;
    public LedConfiguration leds;

    private Configuration(Properties prop) {
        video = new VideoConfiguration(prop);
        leds = new LedConfiguration(prop);
    }

    public static Configuration from(String propertiesFile) {
        InputStream input = null;
        try {
            input = new FileInputStream(propertiesFile);
            Properties prop = new Properties();
            prop.load(input);
            return new Configuration(prop);
        } catch (IOException ex) {
            ex.printStackTrace();
        } finally {
            if (input != null) {
                try {
                    input.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
    }

    private String get(Properties prop, String name) {
        return addSetting(name, prop.getProperty(name));
    }

    private String get(Properties prop, String name, String dflt) {
        return addSetting(name, prop.getProperty(name, dflt));
    }

    private String addSetting(String name, String value) {
        settings.add(new AbstractMap.SimpleEntry<>(name, value));
        return value;
    }

    @Override
    public String toString() {
        return settings.stream().map(entry -> entry.getKey() + "=" + entry.getValue()).collect(Collectors.joining("\n"));
    }

    public class VideoConfiguration {
        public String device;
        public int width;
        public int height;
        public int bpp;

        private VideoConfiguration(Properties prop) {
            device = get(prop, "video.device", "/dev/video0");
            width = Integer.parseInt(get(prop, "video.width", "720"));
            height = Integer.parseInt(get(prop, "video.height", "576"));
            bpp = Integer.parseInt(get(prop, "video.bpp", "2"));
        }
    }

    public class LedConfiguration {
        public int cols;
        public int rows;

        private LedConfiguration(Properties prop) {
            cols = Integer.parseInt(get(prop, "leds.cols"));
            rows = Integer.parseInt(get(prop, "leds.rows"));
        }
    }
}