/*
* JBoss, Home of Professional Open Source.
* Copyright 2014, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.wildfly.core.launcher.logger;
import static java.security.AccessController.doPrivileged;
import java.lang.reflect.Field;
import java.security.PrivilegedAction;
import java.util.Locale;
/**
* Copied the logging Messages to use 0 dependencies for this module.
*
* @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a>
* @author <a href="mailto:jperkins@redhat.com">James R. Perkins</a>
*/
class Messages {
private Messages() {
}
/**
* Get a message bundle of the given type.
*
* @param type the bundle type class
*
* @return the bundle
*/
public static <T> T getBundle(final Class<T> type) {
return doPrivileged(new PrivilegedAction<T>() {
public T run() {
final Locale locale = Locale.getDefault();
final String lang = locale.getLanguage();
final String country = locale.getCountry();
final String variant = locale.getVariant();
Class<? extends T> bundleClass = null;
if (variant != null && !variant.isEmpty()) try {
bundleClass = Class.forName(join(type.getName(), "$bundle", lang, country, variant), true, type.getClassLoader()).asSubclass(type);
} catch (ClassNotFoundException e) {
// ignore
}
if (bundleClass == null && country != null && !country.isEmpty()) try {
bundleClass = Class.forName(join(type.getName(), "$bundle", lang, country, null), true, type.getClassLoader()).asSubclass(type);
} catch (ClassNotFoundException e) {
// ignore
}
if (bundleClass == null && lang != null && !lang.isEmpty()) try {
bundleClass = Class.forName(join(type.getName(), "$bundle", lang, null, null), true, type.getClassLoader()).asSubclass(type);
} catch (ClassNotFoundException e) {
// ignore
}
if (bundleClass == null) try {
bundleClass = Class.forName(join(type.getName(), "$bundle", null, null, null), true, type.getClassLoader()).asSubclass(type);
} catch (ClassNotFoundException e) {
throw new IllegalArgumentException("Invalid bundle " + type + " (implementation not found)");
}
final Field field;
try {
field = bundleClass.getField("INSTANCE");
} catch (NoSuchFieldException e) {
throw new IllegalArgumentException("Bundle implementation " + bundleClass + " has no instance field");
}
try {
return type.cast(field.get(null));
} catch (IllegalAccessException e) {
throw new IllegalArgumentException("Bundle implementation " + bundleClass + " could not be instantiated", e);
}
}
});
}
private static String join(final String interfaceName, final String type, final String lang, final String country, final String variant) {
final StringBuilder build = new StringBuilder();
build.append(interfaceName).append('_').append(type);
if (lang != null && !lang.isEmpty()) {
build.append('_');
build.append(lang);
}
if (country != null && !country.isEmpty()) {
build.append('_');
build.append(country);
}
if (variant != null && !variant.isEmpty()) {
build.append('_');
build.append(variant);
}
return build.toString();
}
}