001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.eclipse.aether.internal.impl;
020
021import java.io.File;
022import java.util.Map;
023import java.util.Properties;
024
025/**
026 * Manages access to a properties file.
027 */
028public interface TrackingFileManager {
029    /**
030     * Reads up the specified properties file into {@link Properties}, if exists, otherwise {@code null} is returned.
031     */
032    Properties read(File file);
033
034    /**
035     * Applies updates to specified properties file and returns resulting {@link Properties} with contents same
036     * as in updated file, never {@code null}.
037     */
038    Properties update(File file, Map<String, String> updates);
039}