package com.varaneckas.utils;
import java.io.UnsupportedEncodingException;
import java.util.Enumeration;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;
/**
* UTF-8 friendly ResourceBundle support
*
* Utility that allows having multi-byte characters inside java .property files.
* It removes the need for Sun's native2ascii application, you can simply have
* UTF-8 encoded editable .property files.
*
* Use:
* ResourceBundle bundle = Utf8ResourceBundle.getBundle("bundle_name");
*
* @author Tomas Varaneckas <[email protected]>
*/
public abstract class Utf8ResourceBundle {
/**
* Gets the unicode friendly resource bundle
*
* @param baseName
* @see ResourceBundle#getBundle(String)
* @return Unicode friendly resource bundle
*/
public static final ResourceBundle getBundle(final String baseName) {
return createUtf8PropertyResourceBundle(
ResourceBundle.getBundle(baseName));
}
/**
* Creates unicode friendly {@link PropertyResourceBundle} if possible.
*
* @param bundle
* @return Unicode friendly property resource bundle
*/
private static ResourceBundle createUtf8PropertyResourceBundle(
final ResourceBundle bundle) {
if (!(bundle instanceof PropertyResourceBundle)) {
return bundle;
}
return new Utf8PropertyResourceBundle((PropertyResourceBundle) bundle);
}
/**
* Resource Bundle that does the hard work
*/
private static class Utf8PropertyResourceBundle extends ResourceBundle {
/**
* Bundle with unicode data
*/
private final PropertyResourceBundle bundle;
/**
* Initializing constructor
*
* @param bundle
*/
private Utf8PropertyResourceBundle(final PropertyResourceBundle bundle) {
this.bundle = bundle;
}
@Override
@SuppressWarnings("unchecked")
public Enumeration getKeys() {
return bundle.getKeys();
}
@Override
protected Object handleGetObject(final String key) {
final String value = bundle.getString(key);
if (value == null)
return null;
try {
return new String(value.getBytes("ISO-8859-1"), "UTF-8");
} catch (final UnsupportedEncodingException e) {
throw new RuntimeException("Encoding not supported", e);
}
}
}
}