001    // Copyright 2006 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.ioc.internal.util;
016    
017    import org.apache.tapestry5.ioc.MessageFormatter;
018    
019    import java.util.Locale;
020    
021    
022    public class MessageFormatterImpl implements MessageFormatter
023    {
024        private final String format;
025    
026        private final Locale locale;
027    
028        public MessageFormatterImpl(String format, Locale locale)
029        {
030            this.format = format;
031            this.locale = locale;
032        }
033    
034        public String format(Object... args)
035        {
036            for (int i = 0; i < args.length; i++)
037            {
038                Object arg = args[i];
039    
040                if (Throwable.class.isInstance(arg))
041                {
042                    args[i] = InternalUtils.toMessage((Throwable) arg);
043                }
044            }
045    
046            // Might be tempting to create a Formatter object and just keep reusing it ... but
047            // Formatters are not threadsafe.
048    
049            return String.format(locale, format, args);
050        }
051    
052    }