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