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
015package org.apache.tapestry5.ioc.internal.util;
016
017import org.apache.tapestry5.ioc.MessageFormatter;
018
019import java.util.Locale;
020
021
022public 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}