Package org.ka2ddo.util

Class UTF8ResourceControl

java.lang.Object

java.util.ResourceBundle.Control

org.ka2ddo.util.UTF8ResourceControl

public class UTF8ResourceControl
extends ResourceBundle.Control

This Control loads PropertyResourceBundles using a UTF-8 locale Reader to read the properties file.

Author:

Andrew Pavlin, KA2DDO

Field Summary

Fields

Modifier and Type	Field	Description
static final UTF8ResourceControl	INSTANCE

Fields inherited from class java.util.ResourceBundle.Control

FORMAT_CLASS, FORMAT_DEFAULT, FORMAT_PROPERTIES, TTL_DONT_CACHE, TTL_NO_EXPIRATION_CONTROL

Method Summary

Modifier and Type	Method	Description
List<String>	getFormats(String baseName)	Returns a List of Strings containing formats to be used to load resource bundles for the given baseName.
ResourceBundle	newBundle(String baseName, Locale locale, String format, ClassLoader loader, boolean reload)	Instantiates a resource bundle for the given bundle name of the given format and locale, using the given class loader if necessary.

Methods inherited from class java.util.ResourceBundle.Control

getCandidateLocales, getControl, getFallbackLocale, getNoFallbackControl, getTimeToLive, needsReload, toBundleName, toResourceName

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

INSTANCE

public static final UTF8ResourceControl INSTANCE

Method Details

getFormats

public List<String> getFormats(String baseName)

Returns a List of Strings containing formats to be used to load resource bundles for the given baseName. The ResourceBundle.getBundle factory method tries to load resource bundles with formats in the order specified by the list. The list returned by this method must have at least one String. The predefined formats are "java.class" for class-based resource bundles and "java.properties" for properties-based ones. Strings starting with "java." are reserved for future extensions and must not be used by application-defined formats.

Overrides:

getFormats in class ResourceBundle.Control

Parameters:

baseName - the base name of the resource bundle, a fully qualified class name

Returns:

a List of Strings containing formats for loading resource bundles.

Throws:

NullPointerException - if baseName is null

See Also:

• ResourceBundle.Control.FORMAT_PROPERTIES

newBundle

public ResourceBundle newBundle(String baseName,
 Locale locale,
 String format,
 ClassLoader loader,
 boolean reload)
                         throws IOException

Instantiates a resource bundle for the given bundle name of the given format and locale, using the given class loader if necessary. This method returns null if there is no resource bundle available for the given parameters. If a resource bundle can't be instantiated due to an unexpected error, the error must be reported by throwing an Error or Exception rather than simply returning null.

If the reload flag is true, it indicates that this method is being called because the previously loaded resource bundle has expired.

This implementation instantiates a ResourceBundle as follows.

• The bundle name is obtained by calling toBundleName(baseName, locale).
• If format is "java.properties", toResourceName(bundlename, "properties") is called to get the resource name. If reload is true, load.getResource is called to get a URL for creating a URLConnection. This URLConnection is used to disable the caches of the underlying resource loading layers, and to get an InputStream which is wrapped in a InputStreamReader set up for UTF-8 encoding. Otherwise, loader.getResourceAsStream is called to get an InputStream which is wrapped in a InputStreamReader set up for UTF-8 encoding. Then, a PropertyResourceBundle is constructed with the Reader.
• If format is not "java.properties", an IllegalArgumentException is thrown.

Overrides:

newBundle in class ResourceBundle.Control

Parameters:

baseName - the base bundle name of the resource bundle, a fully qualified class name

locale - the locale for which the resource bundle should be instantiated

format - the resource bundle format to be loaded

loader - the ClassLoader to use to load the bundle

reload - the flag to indicate bundle reloading; true if reloading an expired resource bundle, false otherwise

Returns:

the resource bundle instance, or null if none could be found.

Throws:

NullPointerException - if bundleName, locale, format, or loader is null, or if null is returned by toBundleName

IllegalArgumentException - if format is unknown, or if the resource found for the given parameters contains malformed data.

ClassCastException - if the loaded class cannot be cast to ResourceBundle

ExceptionInInitializerError - if the initialization provoked by this method fails.

SecurityException - If a security manager is present and creation of new instances is denied. See Class.newInstance() for details.

IOException - if an error occurred when reading resources using any I/O operations