PropertiesManager.java

package com.kurento.kmf.common;

public class PropertiesManager {

	public static interface PropertyHolder {
		public String getProperty(String property);
	}

	private static PropertyHolder propertyHolder = new PropertyHolder() {
		@Override
		public String getProperty(String property) {
			return System.getProperty(property);
		}
	};

	public static void setPropertyHolder(PropertyHolder propertyHolder) {
		PropertiesManager.propertyHolder = propertyHolder;
	}

	public static String getProperty(String property) {
		return propertyHolder.getProperty(property);
	}

	public static Address getProperty(String property, Address defaultValue) {

		String systemValue = propertyHolder.getProperty(property);

		if (systemValue == null) {
			return defaultValue;
		} else {
			String[] parts = systemValue.split(":");
			if (parts.length == 0) {
				return defaultValue;
			} else if (parts.length == 1) {
				return new Address(parts[0], defaultValue.getPort());
			} else {
				String host = parts[0];
				int port;
				try {
					port = Integer.parseInt(parts[1]);
				} catch (NumberFormatException e) {
					port = defaultValue.getPort();
				}
				return new Address(host, port);
			}
		}
	}

	public static int getProperty(String property, int defaultValue) {
		String systemValue = propertyHolder.getProperty(property);
		return systemValue != null ? Integer.parseInt(systemValue)
				: defaultValue;
	}

	public static String getProperty(String property, String defaultValue) {
		String value = propertyHolder.getProperty(property);
		if (value != null) {
			return value;
		} else {
			return defaultValue;
		}
	}

	public static boolean getProperty(String property, boolean defaultValue) {
		String systemValue = propertyHolder.getProperty(property);
		return systemValue != null ? Boolean.parseBoolean(systemValue)
				: defaultValue;
	}

	private static String createWithPrefix(String prefix, String property) {
		if (prefix == null) {
			return property;
		} else {
			return prefix + "." + property;
		}
	}

	public static int getProperty(String prefix, String property,
			int defaultValue) {
		return getProperty(createWithPrefix(prefix, property), defaultValue);
	}

	public static String getProperty(String prefix, String property,
			String defaultValue) {
		return getProperty(createWithPrefix(prefix, property), defaultValue);
	}

	public static Address getProperty(String prefix, String property,
			Address defaultValue) {
		return getProperty(createWithPrefix(prefix, property), defaultValue);
	}
}