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package com.sun.enterprise.util;
import java.text.MessageFormat;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.logging.*;
//END OF IASRI 4660742
/**
* Implementation of a local string manager.
* Provides access to i18n messages for classes that need them.
*/
public class LocalStringManagerImpl implements LocalStringManager {
// START OF IASRI 4660742
//WARNING: _logger must be initialized upon demand in this case. The
//reason is that this static init happens before the ServerContext
//is initialized
private static Logger _logger = null;
// END OF IASRI 4660742
private Class defaultClass;
/**
* Create a string manager that looks for LocalStrings.properties in
* the package of the defaultClass.
* @param defaultClass Class whose package has default localized strings
*/
public LocalStringManagerImpl(Class defaultClass) {
this.defaultClass = defaultClass;
}
/**
* Get a localized string.
* Strings are stored in a single property file per package named
* LocalStrings[_locale].properties. Starting from the class of the
* caller, we walk up the class hierarchy until we find a package
* resource bundle that provides a value for the requested key.
*
* <p>This simplifies access to resources, at the cost of checking for
* the resource bundle of several classes upon each call. However, due
* to the caching performed by <tt>ResourceBundle</tt> this seems
* reasonable.
*
* <p>Due to that, sub-classes <strong>must</strong> make sure they don't
* have conflicting resource naming.
* @param callerClass The object making the call, to allow per-package
* resource bundles
* @param key The name of the resource to fetch
* @param defaultValue The default return value if not found
* @return The localized value for the resource
*/
public String getLocalString(
Class callerClass,
String key,
String defaultValue
) {
Class stopClass = defaultClass.getSuperclass();
Class startClass = ((callerClass != null) ? callerClass :
defaultClass);
ResourceBundle resources = null;
boolean globalDone = false;
for (Class c = startClass;
c != stopClass && c != null;
c = c.getSuperclass()) {
globalDone = (c == defaultClass);
try {
// Construct the bundle name as LocalStrings in the
// caller class's package.
StringBuffer resFileName = new StringBuffer(
c.getName().substring(0, c.getName().lastIndexOf(".")));
resFileName.append(".LocalStrings");
resources = ResourceBundle.getBundle(resFileName.toString(), Locale.getDefault(), c.getClassLoader());
if ( resources != null ) {
String value = resources.getString(key);
if ( value != null )
return value;
}
} catch (Exception ex) {
}
}
// Look for a global resource (defined by defaultClass)
if ( ! globalDone ) {
return getLocalString(null, key, defaultValue);
} else {
CULoggerInfo.getLogger().log(Level.FINE, "No local string for", key);
return defaultValue;
}
}
/**
* Get a localized string from the package of the default class.
* @param key The name of the resource to fetch
* @param defaultValue The default return value if not found
* @return The localized string
*/
public String getLocalString(String key, String defaultValue) {
return getLocalString(null, key, defaultValue);
}
/**
* Get a local string for the caller and format the arguments accordingly.
* @param callerClass The caller (to walk through its class hierarchy)
* @param key The key to the local format string
* @param fmt The default format if not found in the resources
* @param arguments The set of arguments to provide to the formatter
* @return A formatted localized string
*/
public String getLocalString(
Class callerClass,
String key,
String defaultFormat,
Object... arguments
) {
MessageFormat f = new MessageFormat(
getLocalString(callerClass, key, defaultFormat));
for (int i = 0; i < arguments.length; i++) {
if ( arguments[i] == null ) {
arguments[i] = "null";
} else if ( !(arguments[i] instanceof String) &&
!(arguments[i] instanceof Number) &&
!(arguments[i] instanceof java.util.Date)) {
arguments[i] = arguments[i].toString();
}
}
return f.format(arguments);
}
/**
* Get a local string from the package of the default class and
* format the arguments accordingly.
* @param key The key to the local format string
* @param fmt The default format if not found in the resources
* @param arguments The set of arguments to provide to the formatter
* @return A formatted localized string
*/
public String getLocalString(
String key,
String defaultFormat,
Object... arguments
) {
return getLocalString(null, key, defaultFormat, arguments);
}
}