001package org.eclipse.aether.internal.impl;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *  http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import java.io.File;
023import java.util.Map;
024import java.util.Properties;
025
026/**
027 * Manages access to a properties file.
028 */
029public interface TrackingFileManager
030{
031    /**
032     * Reads up the specified properties file into {@link Properties}, if exists, otherwise {@code null} is returned.
033     */
034    Properties read( File file );
035
036    /**
037     * Applies updates to specified properties file and returns resulting {@link Properties} with contents same
038     * as in updated file, never {@code null}.
039     */
040    Properties update( File file, Map<String, String> updates );
041}