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/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.help.internal.webapp;
import java.text.*;
import java.util.*;
import org.eclipse.core.runtime.*;
/**
* Uses a resource bundle to load images and strings from a property file in a
* documentation plugin
*/
public class WebappResources {
// resource bundles indexed by locale
private static HashMap resourceBundleTable = new HashMap();
/**
* Returns a string from a property file. It uses 'name' as a the key to
* retrieve from the webapp.properties file.
*/
public static String getString(String name, Locale locale) {
// get bundle
ResourceBundle bundle = getBundle(locale);
if (bundle == null) {
return name;
}
// get value
try {
return bundle.getString(name);
} catch (MissingResourceException mre) {
return name;
}
}
/**
* Returns a string from a property file
*/
public static String getString(String name, Locale locale, String replace0) {
// get bundle
ResourceBundle bundle = getBundle(locale);
if (bundle == null) {
return name;
}
// get value
try {
String stringFromPropertiesFile = bundle.getString(name);
stringFromPropertiesFile = MessageFormat.format(
stringFromPropertiesFile, new Object[]{replace0});
return stringFromPropertiesFile;
} catch (Exception e) {
return name;
}
}
/**
* Obtains resource bundle for specified locale. Loads bundle if necessary
*
* @param locale
* Locale or null to use default locale
* @return ResourceBundle or null if not found
*/
private static ResourceBundle getBundle(Locale locale) {
if (locale == null)
locale = getDefaultLocale();
// check cache
ResourceBundle bundle = (ResourceBundle) resourceBundleTable
.get(locale);
// load bundle
if (bundle == null) {
bundle = ResourceBundle.getBundle(WebappResources.class.getName(),
locale);
if (bundle != null) {
resourceBundleTable.put(locale, bundle);
}
}
return bundle;
}
private static Locale getDefaultLocale() {
String nl = Platform.getNL();
// sanity test
if (nl == null)
return Locale.getDefault();
// break the string into tokens to get the Locale object
StringTokenizer locales = new StringTokenizer(nl, "_"); //$NON-NLS-1$
if (locales.countTokens() == 1)
return new Locale(locales.nextToken(), ""); //$NON-NLS-1$
else if (locales.countTokens() == 2)
return new Locale(locales.nextToken(), locales.nextToken());
else if (locales.countTokens() == 3)
return new Locale(locales.nextToken(), locales.nextToken(), locales
.nextToken());
else
return Locale.getDefault();
}
}
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