001// Copyright 2006, 2012 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.internal.services;
016
017/**
018 * An implementation  of {@link Messages} that is based on a map.
019 *
020 */
021
022import org.apache.tapestry5.ioc.Messages;
023import org.apache.tapestry5.ioc.util.AbstractMessages;
024
025import java.util.Locale;
026import java.util.Map;
027import java.util.Set;
028
029/**
030 * Implementation of {@link Messages} based on a simple Map (of string keys and values).
031 */
032public class MapMessages extends AbstractMessages
033{
034    private final Map<String, String> properties;
035
036
037    /**
038     * A new instance <strong>retaining</strong> (not copying) the provided map.
039     */
040    public MapMessages(Locale locale, Map<String, String> properties)
041    {
042        super(locale);
043
044        this.properties = properties;
045    }
046
047
048    @Override
049    protected String valueForKey(String key)
050    {
051        return properties.get(key);
052    }
053
054    public Set<String> getKeys()
055    {
056        return properties.keySet();
057    }
058}