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   * Licensed to the Apache Software Foundation (ASF) under one or more
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This abstract class implements the common timestamp parsing algorithm for all the concrete parsers. Classes derived from this one will parse file listings via a supplied regular expression that pulls out the date portion as a separate string which is passed to the underlying delegate to handle parsing of the file timestamp.

This class also implements the Configurable interface to allow the parser to be configured from the outside.

To change the template for this generated type comment go to Window - Preferences - Java - Code Style - Code Templates - Comments
 public abstract class ConfigurableFTPFileEntryParserImpl
 extends RegexFTPFileEntryParserImpl
 implements Configurable
     private final FTPTimestampParser timestampParser;

Only constructor for this abstract class.

regex Regular expression used main parsing of the file listing.
         this. = new FTPTimestampParserImpl();

This method is called by the concrete parsers to delegate timestamp parsing to the timestamp parser.

timestampStr the timestamp string pulled from the file listing by the regular expression parser, to be submitted to the timestampParser for extracting the timestamp.
a java.util.Calendar containing results of the timestamp parse.
     public Calendar parseTimestamp(String timestampStrthrows ParseException {
         return this..parseTimestamp(timestampStr);

Implementation of the interface. Configures this parser by delegating to the underlying Configurable FTPTimestampParser implementation, ' passing it the supplied if that is non-null or a default configuration defined by each concrete subclass.

config the configuration to be used to configure this parser. If it is null, a default configuration defined by each concrete subclass is used instead.
 //    @Override
     public void configure(FTPClientConfig config)
         if (this. instanceof Configurable) {
             FTPClientConfig defaultCfg = getDefaultConfiguration();
             if (config != null) {
                 if (null == config.getDefaultDateFormatStr()) {
                 if (null == config.getRecentDateFormatStr()) {
            } else {

Each concrete subclass must define this member to create a default configuration to be used when that subclass is instantiated without a parameter being specified.

the default configuration for the subclass.
    protected abstract FTPClientConfig getDefaultConfiguration();
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