/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.net.ftp;

import java.text.DateFormatSymbols;
import java.util.Collection;
import java.util.Locale;
import java.util.Map;
import java.util.StringTokenizer;
import java.util.TreeMap;

/**
 * <p>
 * This class implements an alternate means of configuring the {@link org.apache.commons.net.ftp.FTPClient FTPClient} object and also subordinate objects which
 * it uses. Any class implementing the {@link org.apache.commons.net.ftp.Configurable Configurable} interface can be configured by this object.
 * </p>
 * <p>
 * In particular this class was designed primarily to support configuration of FTP servers which express file timestamps in formats and languages other than
 * those for the US locale, which although it is the most common is not universal. Unfortunately, nothing in the FTP spec allows this to be determined in an
 * automated way, so manual configuration such as this is necessary.
 * </p>
 * <p>
 * This functionality was designed to allow existing clients to work exactly as before without requiring use of this component. This component should only need
 * to be explicitly invoked by the user of this package for problem cases that previous implementations could not solve.
 * </p>
 * <h2>Examples of use of FTPClientConfig</h2> Use cases: You are trying to access a server that
 * <ul>
 * <li>lists files with timestamps that use month names in languages other than English</li>
 * <li>lists files with timestamps that use date formats other than the American English "standard" {@code MM dd yyyy}</li>
 * <li>is in different time zone and you need accurate timestamps for dependency checking as in Ant</li>
 * </ul>
 * <p>
 * Unpaged (whole list) access on a Unix server that uses French month names but uses the "standard" {@code MMM d yyyy} date formatting
 * </p>
 * <pre>
 * FTPClient f = FTPClient();
 * FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_UNIX);
 * conf.setServerLanguageCode("fr");
 * f.configure(conf);
 * f.connect(server);
 * f.login(user, password);
 * FTPFile[] files = listFiles(directory);
 * </pre>
 * <p>
 * Paged access on a Unix server that uses Danish month names and "European" date formatting in Denmark's time zone, when you are in some other time zone.
 * </p>
 * <pre>
 * FTPClient f = FTPClient();
 * FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_UNIX);
 * conf.setServerLanguageCode("da");
 * conf.setDefaultDateFormat("d MMM yyyy");
 * conf.setRecentDateFormat("d MMM HH:mm");
 * conf.setTimeZoneId("Europe/Copenhagen");
 * f.configure(conf);
 * f.connect(server);
 * f.login(user, password);
 * FTPListParseEngine engine = f.initiateListParsing("com.whatever.YourOwnParser", directory);
 *
 * while (engine.hasNext()) {
 *     FTPFile[] files = engine.getNext(25); // "page size" you want
 *     // do whatever you want with these files, display them, etc.
 *     // expensive FTPFile objects not created until needed.
 * }
 * </pre>
 * <p>
 * Unpaged (whole list) access on a VMS server that uses month names in a language not {@link #getSupportedLanguageCodes() supported} by the system. but uses
 * the "standard" {@code MMM d yyyy} date formatting
 * </p>
 * <pre>
 * FTPClient f = FTPClient();
 * FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_VMS);
 * conf.setShortMonthNames("jan|feb|mar|apr|ma\u00ED|j\u00FAn|j\u00FAl|\u00e1g\u00FA|sep|okt|n\u00F3v|des");
 * f.configure(conf);
 * f.connect(server);
 * f.login(user, password);
 * FTPFile[] files = listFiles(directory);
 * </pre>
 * <p>
 * Unpaged (whole list) access on a Windows-NT server in a different time zone. (Note, since the NT Format uses numeric date formatting, language issues are
 * irrelevant here).
 * </p>
 * <pre>
 * FTPClient f = FTPClient();
 * FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);
 * conf.setTimeZoneId("America/Denver");
 * f.configure(conf);
 * f.connect(server);
 * f.login(user, password);
 * FTPFile[] files = listFiles(directory);
 * </pre>
 * <p>
 * Unpaged (whole list) access on a Windows-NT server in a different time zone but which has been configured to use a unix-style listing format.
 * </p>
 * <pre>
 * FTPClient f = FTPClient();
 * FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_UNIX);
 * conf.setTimeZoneId("America/Denver");
 * f.configure(conf);
 * f.connect(server);
 * f.login(user, password);
 * FTPFile[] files = listFiles(directory);
 * </pre>
 *
 * @since 1.4
 * @see org.apache.commons.net.ftp.Configurable
 * @see org.apache.commons.net.ftp.FTPClient
 * @see org.apache.commons.net.ftp.parser.FTPTimestampParserImpl#configure(FTPClientConfig)
 * @see org.apache.commons.net.ftp.parser.ConfigurableFTPFileEntryParserImpl
 */
public class FTPClientConfig {

    /**
     * Identifier by which a Unix-based ftp server is known throughout the commons-net ftp system.
     */
    public static final String SYST_UNIX = "UNIX";

    /**
     * Identifier for alternate Unix parser; same as {@link #SYST_UNIX} but leading spaces are trimmed from file names. This is to maintain backwards
     * compatibility with the original behavior of the parser which ignored multiple spaces between the date and the start of the file name.
     *
     * @since 3.4
     */
    public static final String SYST_UNIX_TRIM_LEADING = "UNIX_LTRIM";

    /**
     * Identifier by which a vms-based ftp server is known throughout the commons-net ftp system.
     */
    public static final String SYST_VMS = "VMS";

    /**
     * Identifier by which a WindowsNT-based ftp server is known throughout the commons-net ftp system.
     */
    public static final String SYST_NT = "WINDOWS";

    /**
     * Identifier by which an OS/2-based ftp server is known throughout the commons-net ftp system.
     */
    public static final String SYST_OS2 = "OS/2";

    /**
     * Identifier by which an OS/400-based ftp server is known throughout the commons-net ftp system.
     */
    public static final String SYST_OS400 = "OS/400";

    /**
     * Identifier by which an AS/400-based ftp server is known throughout the commons-net ftp system.
     */
    public static final String SYST_AS400 = "AS/400";

    /**
     * Identifier by which an MVS-based ftp server is known throughout the commons-net ftp system.
     */
    public static final String SYST_MVS = "MVS";

    /**
     * Some servers return an "UNKNOWN Type: L8" message in response to the SYST command. We set these to be a Unix-type system. This may happen if the ftpd in
     * question was compiled without system information.
     *
     * NET-230 - Updated to be UPPERCASE so that the check done in createFileEntryParser will succeed.
     *
     * @since 1.5
     */
    public static final String SYST_L8 = "TYPE: L8";

    /**
     * Identifier by which a Netware-based ftp server is known throughout the commons-net ftp system.
     *
     * @since 1.5
     */
    public static final String SYST_NETWARE = "NETWARE";

    /**
     * Identifier by which a Mac pre OS-X -based ftp server is known throughout the commons-net ftp system.
     *
     * @since 3.1
     */
    // Full string is "MACOS Peter's Server"; the substring below should be enough
    public static final String SYST_MACOS_PETER = "MACOS PETER"; // NET-436

    private static final Map<String, Object> LANGUAGE_CODE_MAP = new TreeMap<>();
    static {

        // if there are other commonly used month name encodings which
        // correspond to particular locales, please add them here.

        // many locales code short names for months as all three letters
        // these we handle simply.
        LANGUAGE_CODE_MAP.put("en", Locale.ENGLISH);
        LANGUAGE_CODE_MAP.put("de", Locale.GERMAN);
        LANGUAGE_CODE_MAP.put("it", Locale.ITALIAN);
        LANGUAGE_CODE_MAP.put("es", new Locale("es", "", "")); // spanish
        LANGUAGE_CODE_MAP.put("pt", new Locale("pt", "", "")); // portuguese
        LANGUAGE_CODE_MAP.put("da", new Locale("da", "", "")); // danish
        LANGUAGE_CODE_MAP.put("sv", new Locale("sv", "", "")); // swedish
        LANGUAGE_CODE_MAP.put("no", new Locale("no", "", "")); // norwegian
        LANGUAGE_CODE_MAP.put("nl", new Locale("nl", "", "")); // dutch
        LANGUAGE_CODE_MAP.put("ro", new Locale("ro", "", "")); // romanian
        LANGUAGE_CODE_MAP.put("sq", new Locale("sq", "", "")); // albanian
        LANGUAGE_CODE_MAP.put("sh", new Locale("sh", "", "")); // serbo-croatian
        LANGUAGE_CODE_MAP.put("sk", new Locale("sk", "", "")); // slovak
        LANGUAGE_CODE_MAP.put("sl", new Locale("sl", "", "")); // slovenian

        // some don't
        LANGUAGE_CODE_MAP.put("fr", "jan|f\u00e9v|mar|avr|mai|jun|jui|ao\u00fb|sep|oct|nov|d\u00e9c"); // french

    }

    /**
     * Gets a DateFormatSymbols object configured with short month names as in the supplied string
     *
     * @param shortmonths This should be as described in {@link #setShortMonthNames(String) shortMonthNames}
     * @return a DateFormatSymbols object configured with short month names as in the supplied string
     */
    public static DateFormatSymbols getDateFormatSymbols(final String shortmonths) {
        final String[] months = splitShortMonthString(shortmonths);
        final DateFormatSymbols dfs = new DateFormatSymbols(Locale.US);
        dfs.setShortMonths(months);
        return dfs;
    }

    /**
     * Gets a Collection of all the language codes currently supported by this class. See {@link #setServerLanguageCode(String) serverLanguageCode} for a
     * functional description of language codes within this system.
     *
     * @return a Collection of all the language codes currently supported by this class
     */
    public static Collection<String> getSupportedLanguageCodes() {
        return LANGUAGE_CODE_MAP.keySet();
    }

    /**
     * Looks up the supplied language code in the internally maintained table of language codes. Returns a DateFormatSymbols object configured with short month
     * names corresponding to the code. If there is no corresponding entry in the table, the object returned will be that for {@code Locale.US}
     *
     * @param languageCode See {@link #setServerLanguageCode(String) serverLanguageCode}
     * @return a DateFormatSymbols object configured with short month names corresponding to the supplied code, or with month names for {@code Locale.US}
     *         if there is no corresponding entry in the internal table.
     */
    public static DateFormatSymbols lookupDateFormatSymbols(final String languageCode) {
        final Object lang = LANGUAGE_CODE_MAP.get(languageCode);
        if (lang != null) {
            if (lang instanceof Locale) {
                return new DateFormatSymbols((Locale) lang);
            }
            if (lang instanceof String) {
                return getDateFormatSymbols((String) lang);
            }
        }
        return new DateFormatSymbols(Locale.US);
    }

    private static String[] splitShortMonthString(final String shortmonths) {
        final StringTokenizer st = new StringTokenizer(shortmonths, "|");
        final int monthcnt = st.countTokens();
        if (12 != monthcnt) {
            throw new IllegalArgumentException("expecting a pipe-delimited string containing 12 tokens");
        }
        final String[] months = new String[13];
        int pos = 0;
        while (st.hasMoreTokens()) {
            months[pos++] = st.nextToken();
        }
        months[pos] = "";
        return months;
    }

    private final String serverSystemKey;
    private String defaultDateFormatStr;

    private String recentDateFormatStr;

    private boolean lenientFutureDates = true; // NET-407

    private String serverLanguageCode;

    private String shortMonthNames;

    private String serverTimeZoneId;

    private boolean saveUnparseableEntries;

    /**
     * Convenience constructor mainly for use in testing. Constructs a Unix configuration.
     */
    public FTPClientConfig() {
        this(SYST_UNIX);
    }

    /**
     * Copy constructor
     *
     * @param config source
     * @since 3.6
     */
    public FTPClientConfig(final FTPClientConfig config) {
        this.serverSystemKey = config.serverSystemKey;
        this.defaultDateFormatStr = config.defaultDateFormatStr;
        this.lenientFutureDates = config.lenientFutureDates;
        this.recentDateFormatStr = config.recentDateFormatStr;
        this.saveUnparseableEntries = config.saveUnparseableEntries;
        this.serverLanguageCode = config.serverLanguageCode;
        this.serverTimeZoneId = config.serverTimeZoneId;
        this.shortMonthNames = config.shortMonthNames;
    }

    /**
     * The main constructor for an FTPClientConfig object
     *
     * @param systemKey key representing system type of the server being connected to. See {@link #getServerSystemKey() serverSystemKey} If set to the empty
     *                  string, then FTPClient uses the system type returned by the server. However, this is not recommended for general use; the correct system
     *                  type should be set if it is known.
     */
    public FTPClientConfig(final String systemKey) {
        this.serverSystemKey = systemKey;
    }

    // Copy constructor, intended for use by FTPClient only
    FTPClientConfig(final String systemKey, final FTPClientConfig config) {
        this.serverSystemKey = systemKey;
        this.defaultDateFormatStr = config.defaultDateFormatStr;
        this.lenientFutureDates = config.lenientFutureDates;
        this.recentDateFormatStr = config.recentDateFormatStr;
        this.saveUnparseableEntries = config.saveUnparseableEntries;
        this.serverLanguageCode = config.serverLanguageCode;
        this.serverTimeZoneId = config.serverTimeZoneId;
        this.shortMonthNames = config.shortMonthNames;
    }

    /**
     * Constructor which allows setting of the format string member fields
     *
     * @param systemKey            key representing system type of the server being connected to. See {@link #getServerSystemKey() serverSystemKey}
     * @param defaultDateFormatStr See {@link #setDefaultDateFormatStr(String) defaultDateFormatStr}
     * @param recentDateFormatStr  See {@link #setRecentDateFormatStr(String) recentDateFormatStr}
     * @since 3.6
     */
    public FTPClientConfig(final String systemKey, final String defaultDateFormatStr, final String recentDateFormatStr) {
        this(systemKey);
        this.defaultDateFormatStr = defaultDateFormatStr;
        this.recentDateFormatStr = recentDateFormatStr;
    }

    /**
     * Constructor which allows setting of most member fields
     *
     * @param systemKey            key representing system type of the server being connected to. See {@link #getServerSystemKey() serverSystemKey}
     * @param defaultDateFormatStr See {@link #setDefaultDateFormatStr(String) defaultDateFormatStr}
     * @param recentDateFormatStr  See {@link #setRecentDateFormatStr(String) recentDateFormatStr}
     * @param serverLanguageCode   See {@link #setServerLanguageCode(String) serverLanguageCode}
     * @param shortMonthNames      See {@link #setShortMonthNames(String) shortMonthNames}
     * @param serverTimeZoneId     See {@link #setServerTimeZoneId(String) serverTimeZoneId}
     */
    public FTPClientConfig(final String systemKey, final String defaultDateFormatStr, final String recentDateFormatStr, final String serverLanguageCode,
            final String shortMonthNames, final String serverTimeZoneId) {
        this(systemKey);
        this.defaultDateFormatStr = defaultDateFormatStr;
        this.recentDateFormatStr = recentDateFormatStr;
        this.serverLanguageCode = serverLanguageCode;
        this.shortMonthNames = shortMonthNames;
        this.serverTimeZoneId = serverTimeZoneId;
    }

    /**
     * Constructor which allows setting of all member fields
     *
     * @param systemKey              key representing system type of the server being connected to. See {@link #getServerSystemKey() serverSystemKey}
     * @param defaultDateFormatStr   See {@link #setDefaultDateFormatStr(String) defaultDateFormatStr}
     * @param recentDateFormatStr    See {@link #setRecentDateFormatStr(String) recentDateFormatStr}
     * @param serverLanguageCode     See {@link #setServerLanguageCode(String) serverLanguageCode}
     * @param shortMonthNames        See {@link #setShortMonthNames(String) shortMonthNames}
     * @param serverTimeZoneId       See {@link #setServerTimeZoneId(String) serverTimeZoneId}
     * @param lenientFutureDates     See {@link #setLenientFutureDates(boolean) lenientFutureDates}
     * @param saveUnparseableEntries See {@link #setUnparseableEntries(boolean) saveUnparseableEntries}
     */
    public FTPClientConfig(final String systemKey, final String defaultDateFormatStr, final String recentDateFormatStr, final String serverLanguageCode,
            final String shortMonthNames, final String serverTimeZoneId, final boolean lenientFutureDates, final boolean saveUnparseableEntries) {
        this(systemKey);
        this.defaultDateFormatStr = defaultDateFormatStr;
        this.lenientFutureDates = lenientFutureDates;
        this.recentDateFormatStr = recentDateFormatStr;
        this.saveUnparseableEntries = saveUnparseableEntries;
        this.serverLanguageCode = serverLanguageCode;
        this.shortMonthNames = shortMonthNames;
        this.serverTimeZoneId = serverTimeZoneId;
    }

    /**
     * Gets the {@link #setDefaultDateFormatStr(String) defaultDateFormatStr} property.
     *
     * @return the defaultDateFormatStr property.
     */
    public String getDefaultDateFormatStr() {
        return defaultDateFormatStr;
    }

    /**
     * Gets the {@link #setRecentDateFormatStr(String) recentDateFormatStr} property.
     *
     * @return the recentDateFormatStr property.
     */

    public String getRecentDateFormatStr() {
        return recentDateFormatStr;
    }

    /**
     * Gets the {@link #setServerLanguageCode(String) serverLanguageCode} property.
     *
     * @return the serverLanguageCode property.
     */
    public String getServerLanguageCode() {
        return serverLanguageCode;
    }

    /**
     * Gets the serverSystemKey property. This property specifies the general type of server to which the client connects. Should be either one of the
     * {@code FTPClientConfig.SYST_*} codes or else the fully qualified class name of a parser implementing both the {@code FTPFileEntryParser} and
     * {@code Configurable} interfaces.
     *
     * @return the serverSystemKey property.
     */
    public String getServerSystemKey() {
        return serverSystemKey;
    }

    /**
     * Gets the {@link #setServerTimeZoneId(String) serverTimeZoneId} property.
     *
     * @return the serverTimeZoneId property.
     */
    public String getServerTimeZoneId() {
        return serverTimeZoneId;
    }

    /**
     * Gets the {@link #setShortMonthNames(String) shortMonthNames} property.
     *
     * @return the shortMonthNames.
     */
    public String getShortMonthNames() {
        return shortMonthNames;
    }

    /**
     * Gets whether parsing a list should return FTPFile entries even for unparseable response lines
     * <p>
     * If true, the FTPFile for any unparseable entries will contain only the unparsed entry {@link FTPFile#getRawListing()} and {@link FTPFile#isValid()} will
     * return {@code false}
     * </p>
     *
     * @return true if list parsing should return FTPFile entries even for unparseable response lines
     * @since 3.4
     */
    public boolean getUnparseableEntries() {
        return saveUnparseableEntries;
    }

    /**
     * Tests whether the {@link #setLenientFutureDates(boolean) lenientFutureDates} property.
     *
     * @return the lenientFutureDates (default true).
     * @since 1.5
     */
    public boolean isLenientFutureDates() {
        return lenientFutureDates;
    }

    /**
     * Sets the defaultDateFormatStr property. This property specifies the main date format that will be used by a parser configured by this configuration
     * to parse file timestamps. If this is not specified, such a parser will use as a default value, the most commonly used format which will be in as used in
     * {@code en_US} locales.
     * <p>
     * This should be in the format described for {@code java.text.SimpleDateFormat}. property.
     * </p>
     *
     * @param defaultDateFormatStr The defaultDateFormatStr to set.
     */
    public void setDefaultDateFormatStr(final String defaultDateFormatStr) {
        this.defaultDateFormatStr = defaultDateFormatStr;
    }

    /**
     * Sets the lenientFutureDates property. This boolean property (default: true) only has meaning when a {@link #setRecentDateFormatStr(String)
     * recentDateFormatStr} property has been set. In that case, if this property is set true, then the parser, when it encounters a listing parseable with the
     * recent date format, will only consider a date to belong to the previous year if it is more than one day in the future. This will allow all out-of-synch
     * situations (whether based on "slop" - i.e. servers simply out of synch with one another or because of time zone differences - but in the latter case it
     * is highly recommended to use the {@link #setServerTimeZoneId(String) serverTimeZoneId} property instead) to resolve correctly.
     * <p>
     * This is used primarily in unix-based systems.
     * </p>
     *
     * @param lenientFutureDates set true to compensate for out-of-synch conditions.
     */
    public void setLenientFutureDates(final boolean lenientFutureDates) {
        this.lenientFutureDates = lenientFutureDates;
    }

    /**
     * Sets the recentDateFormatStr property. This property specifies a secondary date format that will be used by a parser configured by this
     * configuration to parse file timestamps, typically those less than a year old. If this is not specified, such a parser will not attempt to parse using an
     * alternate format.
     * <p>
     * This is used primarily in unix-based systems.
     * </p>
     * <p>
     * This should be in the format described for {@code java.text.SimpleDateFormat}.
     * </p>
     *
     * @param recentDateFormatStr The recentDateFormatStr to set.
     */
    public void setRecentDateFormatStr(final String recentDateFormatStr) {
        this.recentDateFormatStr = recentDateFormatStr;
    }

    /**
     * Sets the serverLanguageCode property. This property allows user to specify a <a href="http://www.ics.uci.edu/pub/ietf/http/related/iso639.txt">
     * two-letter ISO-639 language code</a> that will be used to configure the set of month names used by the file timestamp parser. If neither this nor the
     * {@link #setShortMonthNames(String) shortMonthNames} is specified, parsing will assume English month names, which may or may not be significant, depending
     * on whether the date format(s) specified via {@link #setDefaultDateFormatStr(String) defaultDateFormatStr} and/or {@link #setRecentDateFormatStr(String)
     * recentDateFormatStr} are using numeric or alphabetic month names.
     * <p>
     * If the code supplied is not supported here, {@code en_US} month names will be used. We are supporting here those language codes which, when a
     * {@code java.util.Locale} is constructed using it, and a {@code java.text.SimpleDateFormat} is constructed using that Locale, the array
     * returned by the SimpleDateFormat's {@code getShortMonths()} method consists solely of three 8-bit ASCII character strings. Additionally, languages
     * which do not meet this requirement are included if a common alternative set of short month names is known to be used. This means that users who can tell
     * us of additional such encodings may get them added to the list of supported languages by contacting the Apache Commons Net team.
     * </p>
     * <p>
     * <strong> Please note that this attribute will NOT be used to determine a locale-based date format for the language. </strong> Experience has shown that
     * many if not most FTP servers outside the United States employ the standard {@code en_US} date format orderings of {@code MMM d yyyy} and
     * {@code MMM d HH:mm} and attempting to deduce this automatically here would cause more problems than it would solve. The date format must be changed
     * via the {@link #setDefaultDateFormatStr(String) defaultDateFormatStr} and/or {@link #setRecentDateFormatStr(String) recentDateFormatStr} parameters.
     * </p>
     *
     * @param serverLanguageCode The value to set to the serverLanguageCode property.
     */
    public void setServerLanguageCode(final String serverLanguageCode) {
        this.serverLanguageCode = serverLanguageCode;
    }

    /**
     * Sets the serverTimeZoneId property. This property allows a time zone to be specified corresponding to that known to be used by an FTP server in
     * file listings. This might be particularly useful to clients such as Ant that try to use these timestamps for dependency checking.
     * <p>
     * This should be one of the identifiers used by {@code java.util.TimeZone} to refer to time zones, for example, {@code America/Chicago} or
     * {@code Asia/Rangoon}.
     * </p>
     *
     * @param serverTimeZoneId The serverTimeZoneId to set.
     */
    public void setServerTimeZoneId(final String serverTimeZoneId) {
        this.serverTimeZoneId = serverTimeZoneId;
    }

    /**
     * Sets the shortMonthNames property. This property allows the user to specify a set of month names used by the server that is different from those
     * that may be specified using the {@link #setServerLanguageCode(String) serverLanguageCode} property.
     * <p>
     * This should be a string containing twelve strings each composed of three characters, delimited by pipe (|) characters. Currently, only 8-bit ASCII
     * characters are known to be supported. For example, a set of month names used by a hypothetical Icelandic FTP server might conceivably be specified as
     * {@code "jan|feb|mar|apr|ma&#xED;|j&#xFA;n|j&#xFA;l|&#xE1;g&#xFA;|sep|okt|n&#xF3;v|des"}.
     * </p>
     *
     * @param shortMonthNames The value to set to the shortMonthNames property.
     */
    public void setShortMonthNames(final String shortMonthNames) {
        this.shortMonthNames = shortMonthNames;
    }

    /**
     * Sets list parsing methods to create basic FTPFile entries if parsing fails.
     * <p>
     * In this case, the FTPFile will contain only the unparsed entry {@link FTPFile#getRawListing()} and {@link FTPFile#isValid()} will return {@code false}
     * </p>
     *
     * @param saveUnparseableEntries if true, then create FTPFile entries if parsing fails
     * @since 3.4
     */
    public void setUnparseableEntries(final boolean saveUnparseableEntries) {
        this.saveUnparseableEntries = saveUnparseableEntries;
    }

}