nr-data/src/org/leolo/rail/nrd/ConfigurationManager.java

package org.leolo.rail.nrd;

import java.io.FileReader;
import java.io.IOException;
import java.util.Properties;
import java.util.function.BiConsumer;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class ConfigurationManager {
	private static Logger log = LogManager.getLogger(ConfigurationManager.class);
	
	private static ConfigurationManager instance;
	private Properties prop = new Properties();
	
	public synchronized static ConfigurationManager getInstance() {
		if(instance==null) {
			instance = new ConfigurationManager();
		}
		return instance;
	}
	
	private ConfigurationManager() {
		try(FileReader fr = new FileReader("configuration.properties")){
			log.debug("Loading properties file");
			prop.load(fr);
			log.info("{} entries loaded", prop.size());
		}catch(IOException e) {
			log.fatal(e.getMessage(), e);
			System.exit(1);
		}
		
	}

	public void forEach(BiConsumer<? super Object, ? super Object> action) {
		prop.forEach(action);
	}

	public Object get(Object key) {
		return prop.get(key);
	}

	public Object getOrDefault(Object key, Object defaultValue) {
		return prop.getOrDefault(key, defaultValue);
	}

	public String getProperty(String key, String defaultValue) {
		return prop.getProperty(key, defaultValue);
	}

	public String getProperty(String key) {
		return prop.getProperty(key);
	}

	public int size() {
		return prop.size();
	}

	public boolean containsKey(Object key) {
		return prop.containsKey(key);
	}
}