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package javax.accessibility;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
Base class used to maintain a strongly typed enumeration. This is the superclass of AccessibleState and AccessibleRole.
The toDisplayString method allows you to obtain the localized string
for a locale independent key from a predefined ResourceBundle for the
keys defined in this class. This localized string is intended to be
readable by humans.
Author: Willie Walker, Peter Korn, Lynn Monsanto See Also:
/**
* <p>Base class used to maintain a strongly typed enumeration. This is
* the superclass of {@link AccessibleState} and {@link AccessibleRole}.
* <p>The toDisplayString method allows you to obtain the localized string
* for a locale independent key from a predefined ResourceBundle for the
* keys defined in this class. This localized string is intended to be
* readable by humans.
*
* @see AccessibleRole
* @see AccessibleState
*
* @author Willie Walker
* @author Peter Korn
* @author Lynn Monsanto
*/
public abstract class AccessibleBundle {
private static Hashtable table = new Hashtable();
private final String defaultResourceBundleName
= "com.sun.accessibility.internal.resources.accessibility";
public AccessibleBundle() {
}
The locale independent name of the state. This is a programmatic
name that is not intended to be read by humans.
See Also: - toDisplayString
/**
* The locale independent name of the state. This is a programmatic
* name that is not intended to be read by humans.
* @see #toDisplayString
*/
protected String key = null;
Obtains the key as a localized string.
If a localized string cannot be found for the key, the
locale independent key stored in the role will be returned.
This method is intended to be used only by subclasses so that they
can specify their own resource bundles which contain localized
strings for their keys.
Params: - resourceBundleName – the name of the resource bundle to use for
lookup
- locale – the locale for which to obtain a localized string
Returns: a localized String for the key.
/**
* Obtains the key as a localized string.
* If a localized string cannot be found for the key, the
* locale independent key stored in the role will be returned.
* This method is intended to be used only by subclasses so that they
* can specify their own resource bundles which contain localized
* strings for their keys.
* @param resourceBundleName the name of the resource bundle to use for
* lookup
* @param locale the locale for which to obtain a localized string
* @return a localized String for the key.
*/
protected String toDisplayString(String resourceBundleName,
Locale locale) {
// loads the resource bundle if necessary
loadResourceBundle(resourceBundleName, locale);
// returns the localized string
Object o = table.get(locale);
if (o != null && o instanceof Hashtable) {
Hashtable resourceTable = (Hashtable) o;
o = resourceTable.get(key);
if (o != null && o instanceof String) {
return (String)o;
}
}
return key;
}
Obtains the key as a localized string.
If a localized string cannot be found for the key, the
locale independent key stored in the role will be returned.
Params: - locale – the locale for which to obtain a localized string
Returns: a localized String for the key.
/**
* Obtains the key as a localized string.
* If a localized string cannot be found for the key, the
* locale independent key stored in the role will be returned.
*
* @param locale the locale for which to obtain a localized string
* @return a localized String for the key.
*/
public String toDisplayString(Locale locale) {
return toDisplayString(defaultResourceBundleName, locale);
}
Gets localized string describing the key using the default locale.
Returns: a localized String describing the key for the default locale
/**
* Gets localized string describing the key using the default locale.
* @return a localized String describing the key for the default locale
*/
public String toDisplayString() {
return toDisplayString(Locale.getDefault());
}
Gets localized string describing the key using the default locale.
See Also: Returns: a localized String describing the key using the default locale
/**
* Gets localized string describing the key using the default locale.
* @return a localized String describing the key using the default locale
* @see #toDisplayString
*/
public String toString() {
return toDisplayString();
}
/*
* Loads the Accessibility resource bundle if necessary.
*/
private void loadResourceBundle(String resourceBundleName,
Locale locale) {
if (! table.contains(locale)) {
try {
Hashtable resourceTable = new Hashtable();
ResourceBundle bundle = ResourceBundle.getBundle(resourceBundleName, locale);
Enumeration iter = bundle.getKeys();
while(iter.hasMoreElements()) {
String key = (String)iter.nextElement();
resourceTable.put(key, bundle.getObject(key));
}
table.put(locale, resourceTable);
}
catch (MissingResourceException e) {
System.err.println("loadResourceBundle: " + e);
// Just return so toDisplayString() returns the
// non-localized key.
return;
}
}
}
}