net.yapbam.currency.CurrencyNames Maven / Gradle / Ivy

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Commons Yapbam classes used by desktop and Android versions.

There is a newer version: 1.9.1

package net.yapbam.currency;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.Properties;

public class CurrencyNames {
	private static final String BUNDLE_NAME = "/net/yapbam/currency/currencyNames"; //$NON-NLS-1$

	private static Properties RESOURCE_BUNDLE;
	private static Locale resourceBundleLocale;

	private CurrencyNames() {
	}

	/** Gets the wording of a currency.
	 * 
The wording is returned according the default locale. If there's no localized name known for the default locale, English wording is returned.
	 * @param key The ISO-4217 currency code.
	 * @return The currency name or null if the name is unknown.
	 */
	public static String get(String key) {
		reset();
		String wording = (String) RESOURCE_BUNDLE.get(key);
		return wording==null ? key : wording;
	}
	
	private static void reset() {
		if (!Locale.getDefault().equals(resourceBundleLocale)) {
			Properties properties = new Properties();
			String lang = Locale.getDefault().getLanguage();
			String resourceSuffix = ".properties";
			boolean ok = false;
			try {
				ok = tryLoading(properties, BUNDLE_NAME+"_"+lang+resourceSuffix);
				if (!ok) {
					ok = tryLoading(properties, BUNDLE_NAME+resourceSuffix);
				}
			} catch (IOException e) {
				ok = false;
			}
			if (!ok) {
				throw new MissingResourceException("", "", BUNDLE_NAME);
			}
			RESOURCE_BUNDLE = properties;
			resourceBundleLocale = Locale.getDefault();
		}
	}
	
	private static boolean tryLoading(Properties properties, String name) throws IOException {
		InputStream stream = CurrencyNames.class.getResourceAsStream(name);
		if (stream==null) {
			return false;
		}
		try {
			InputStreamReader reader = new InputStreamReader(stream, "ISO8859-1");
			try {
				properties.load(reader);
				return true;
			} finally {
				reader.close();
			}
		} finally {
			stream.close();
		}
	}
}