org.apache.commons.math.exception.util.MessageFactory Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.math.exception.util;
import java.text.MessageFormat;
import java.util.Locale;
/**
* Class for constructing localized messages.
*
* @since 2.2
* @version $Revision$ $Date$
*/
public class MessageFactory {
/**
* Class contains only static methods.
*/
private MessageFactory() {}
/**
* Builds a message string by from a pattern and its arguments.
*
* @param locale Locale in which the message should be translated.
* @param pattern Format specifier.
* @param arguments Format arguments.
* @return a localized message string.
*/
public static String buildMessage(Locale locale,
Localizable pattern,
Object ... arguments) {
return buildMessage(locale, null, pattern, arguments);
}
/**
* Builds a message string by from two patterns (specific and general) and
* an argument list.
*
* @param locale Locale in which the message should be translated.
* @param specific Format specifier (may be null).
* @param general Format specifier (may be null).
* @param arguments Format arguments. They will be substituted in
* both the {@code general} and {@code specific} format specifiers.
* @return a localized message string.
*/
public static String buildMessage(Locale locale,
Localizable specific,
Localizable general,
Object ... arguments) {
final StringBuilder sb = new StringBuilder();
if (general != null) {
final MessageFormat fmt = new MessageFormat(general.getLocalizedString(locale), locale);
sb.append(fmt.format(arguments));
}
if (specific != null) {
if (general != null) {
sb.append(": ");
}
final MessageFormat fmt = new MessageFormat(specific.getLocalizedString(locale), locale);
sb.append(fmt.format(arguments));
}
return sb.toString();
}
}