001/* -*- mode: Java; c-basic-offset: 2; indent-tabs-mode: nil; coding: utf-8-unix -*-
002 *
003 * Copyright © 2017–2019 microBean.
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
014 * implied.  See the License for the specific language governing
015 * permissions and limitations under the License.
016 */
017package org.microbean.configuration.spi;
018
019import java.io.Serializable;
020
021import java.util.Collections;
022import java.util.Map;
023import java.util.Properties;
024import java.util.Set;
025
026import java.util.function.Function;
027
028import org.microbean.configuration.api.ConfigurationValue;
029
030/**
031 * A {@link PropertiesConfiguration} that {@linkplain
032 * #getValue(Resource, Map, String) gets configuration property
033 * values} from {@link Properties} resources.
034 *
035 * @author <a href="https://about.me/lairdnelson"
036 * target="_parent">Laird Nelson</a>
037 *
038 * @see #getValue(Resource, Map, String)
039 */
040public class ApplicationPropertiesConfiguration extends PropertiesConfiguration {
041
042
043  /*
044   * Static fields.
045   */
046
047
048  /**
049   * The version of this class for {@linkplain Serializable
050   * serialization purposes}.
051   */
052  private static final long serialVersionUID = 1L;
053
054
055  /*
056   * Constructors.
057   */
058
059
060  /**
061   * Creates a new {@link ApplicationPropertiesConfiguration}.
062   */
063  public ApplicationPropertiesConfiguration() {
064    super(new CachingResourceLoader<>(new PropertiesLoader("application.properties")));
065  }
066  
067}