File	Doc	Category	Size	Date	Package
VMSVersioningFTPEntryParser.java	API Doc	Apache Commons NET 1.4.1 API	6528	Sat Dec 03 10:05:48 GMT 2005	org.apache.commons.net.ftp.parser

VMSVersioningFTPEntryParser

• java.lang.Object
  • VMSFTPEntryParser

Fields Summary
private org.apache.oro.text.regex.Perl5Matcher	_preparse_matcher_
private org.apache.oro.text.regex.Pattern	_preparse_pattern_
private static final String	PRE_PARSE_REGEX

Constructors Summary
public VMSVersioningFTPEntryParser() Constructor for a VMSFTPEntryParser object. Sets the versioning member to the supplied value. exception IllegalArgumentException Thrown if the regular expression is unparseable. Should not be seen under normal conditions. It it is seen, this is a sign that REGEX is not a valid regular expression. this(null);
public VMSVersioningFTPEntryParser(org.apache.commons.net.ftp.FTPClientConfig config) This constructor allows the creation of a VMSVersioningFTPEntryParser object with something other than the default configuration. param config The {@link FTPClientConfig configuration} object used to configure this parser. exception IllegalArgumentException Thrown if the regular expression is unparseable. Should not be seen under normal conditions. It it is seen, this is a sign that REGEX is not a valid regular expression. since 1.4 super(); configure(config); try { _preparse_matcher_ = new Perl5Matcher(); _preparse_pattern_ = new Perl5Compiler().compile(PRE_PARSE_REGEX); } catch (MalformedPatternException e) { throw new IllegalArgumentException ( "Unparseable regex supplied: " + PRE_PARSE_REGEX); }

Methods Summary
protected boolean	isVersioning() return true;
public java.util.List	preParse(java.util.List original) Implement hook provided for those implementers (such as VMSVersioningFTPEntryParser, and possibly others) which return multiple files with the same name to remove the duplicates .. param original Original list return Original list purged of duplicates original = super.preParse(original); HashMap existingEntries = new HashMap(); ListIterator iter = original.listIterator(); while (iter.hasNext()) { String entry = ((String)iter.next()).trim(); MatchResult result = null; if (_preparse_matcher_.matches(entry, _preparse_pattern_)) { result = _preparse_matcher_.getMatch(); String name = result.group(1); String version = result.group(2); NameVersion nv = new NameVersion(name, version); NameVersion existing = (NameVersion) existingEntries.get(name); if (null != existing) { if (nv.versionNumber < existing.versionNumber) { iter.remove(); // removal removes from original list. continue; } } existingEntries.put(name, nv); } } // we've now removed all entries less than with less than the largest // version number for each name that were listed after the largest. // we now must remove those with smaller than the largest version number // for each name that were found before the largest while (iter.hasPrevious()) { String entry = ((String)iter.previous()).trim(); MatchResult result = null; if (_preparse_matcher_.matches(entry, _preparse_pattern_)) { result = _preparse_matcher_.getMatch(); String name = result.group(1); String version = result.group(2); NameVersion nv = new NameVersion(name, version); NameVersion existing = (NameVersion) existingEntries.get(name); if (null != existing) { if (nv.versionNumber < existing.versionNumber) { iter.remove(); // removal removes from original list. } } } } return original;