    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  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 implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017
    018package org.apache.commons.io;
    019
    020import java.nio.charset.Charset;
    021import java.util.Objects;
    022
    023/**
    024 * Enumerates standard line separators: {@link #CR}, {@link #CRLF}, {@link #LF}.
    025 *
    026 * @since 2.9.0
    027 */
    028public enum StandardLineSeparator {
    029
    030    /**
    031     * Carriage return. This is the line ending used on macOS 9 and earlier.
    032     */
    033    CR("\r"),
    034
    035    /**
    036     * Carriage return followed by line feed. This is the line ending used on Windows.
    037     */
    038    CRLF("\r\n"),
    039
    040    /**
    041     * Line feed. This is the line ending used on Linux and macOS X and later.
    042     */
    043    LF("\n");
    044
    045    private final String lineSeparator;
    046
    047    /**
    048     * Constructs a new instance for a non-null line separator.
    049     *
    050     * @param lineSeparator a non-null line separator.
    051     */
    052    StandardLineSeparator(final String lineSeparator) {
    053        this.lineSeparator = Objects.requireNonNull(lineSeparator, "lineSeparator");
    054    }
    055
    056    /**
    057     * Gets the bytes for this instance encoded using the given Charset.
    058     *
    059     * @param charset the encoding Charset.
    060     * @return the bytes for this instance encoded using the given Charset.
    061     */
    062    public byte[] getBytes(final Charset charset) {
    063        return lineSeparator.getBytes(charset);
    064    }
    065
    066    /**
    067     * Gets the String value of this instance.
    068     *
    069     * @return the String value of this instance.
    070     */
    071    public String getString() {
    072        return lineSeparator;
    073    }
    074}