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Java Source Code / Java Documentation » Net » Apache commons net 1.4.1 » org.apache.commons.net.ftp 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.apache.commons.net.ftp.FTPFileIterator

FTPFileIterator
public class FTPFileIterator (Code)
This class implements a bidirectional iterator over an FTPFileList. Elements may be retrieved one at at time using the hasNext() - next() syntax familiar from Java 2 collections. Alternatively, entries may be receieved as an array of any requested number of entries or all of them.
author:
   Steve Cohen
version:
   $Id: FTPFileIterator.java 165675 2005-05-02 20:09:55Z rwinston $
See Also:   org.apache.commons.net.ftp.FTPFileList
See Also:   org.apache.commons.net.ftp.FTPFileEntryParser
See Also:   org.apache.commons.net.ftp.FTPListParseEngine



Constructor Summary
 FTPFileIterator(FTPFileList rawlist)
     "Package-private" constructor.
 FTPFileIterator(FTPFileList rawlist, FTPFileEntryParser parser)
     "Package-private" constructor.

Method Summary
public  FTPFile[]getFiles()
     Returns a list of FTPFile objects for ALL files listed in the server's LIST output.
public  FTPFile[]getNext(int quantityRequested)
     Returns an array of at most quantityRequested FTPFile objects starting at this iterator's current position within its associated list.
public  FTPFile[]getPrevious(int quantityRequested)
     Returns an array of at most quantityRequested FTPFile objects starting at the position preceding this iterator's current position within its associated list.
public  booleanhasNext()
     Method for determining whether getNext() will successfully return a non-null value.
public  booleanhasPrevious()
     Method for determining whether getPrevious() will successfully return a non-null value.
public  FTPFilenext()
     Returns a single parsed FTPFile object corresponding to the raw input line at this iterator's current position.
public  FTPFileprevious()
     Returns a single parsed FTPFile object corresponding to the raw input line at the position preceding that of the internal iterator over the list of raw lines maintained by this object After this method is called the internal iterator is retreated by one element (unless it is already at beginning of list).


Constructor Detail
FTPFileIterator
FTPFileIterator(FTPFileList rawlist)(Code)
"Package-private" constructor. Only the FTPFileList can create an iterator, using it's iterator() method. The list will be iterated with the list's default parser.
Parameters:
  rawlist - the FTPFileList to be iterated



FTPFileIterator
FTPFileIterator(FTPFileList rawlist, FTPFileEntryParser parser)(Code)
"Package-private" constructor. Only the FTPFileList can create an iterator, using it's iterator() method. The list will be iterated with a supplied parser
Parameters:
  rawlist - the FTPFileList to be iterated
Parameters:
  parser - the system specific parser for raw FTP entries.




Method Detail
getFiles
public FTPFile[] getFiles()(Code)
Returns a list of FTPFile objects for ALL files listed in the server's LIST output. a list of FTPFile objects for ALL files listed in the server'sLIST output.



getNext
public FTPFile[] getNext(int quantityRequested)(Code)
Returns an array of at most quantityRequested FTPFile objects starting at this iterator's current position within its associated list. If fewer than quantityRequested such elements are available, the returned array will have a length equal to the number of entries at and after after the current position. If no such entries are found, this array will have a length of 0. After this method is called the current position is advanced by either quantityRequested or the number of entries available after the iterator, whichever is fewer.
Parameters:
  quantityRequested - the maximum number of entries we want to get. A 0passed here is a signal to get ALL the entries. an array of at most quantityRequested FTPFileobjects starting at the current position of this iterator within itslist and at least the number of elements which exist in the list atand after its current position.



getPrevious
public FTPFile[] getPrevious(int quantityRequested)(Code)
Returns an array of at most quantityRequested FTPFile objects starting at the position preceding this iterator's current position within its associated list. If fewer than quantityRequested such elements are available, the returned array will have a length equal to the number of entries after the iterator. If no such entries are found, this array will have a length of 0. The entries will be ordered in the same order as the list, not reversed. After this method is called the current position is moved back by either quantityRequested or the number of entries available before the current position, whichever is fewer.
Parameters:
  quantityRequested - the maximum number of entries we want to get.A 0 passed here is a signal to get ALL the entries. an array of at most quantityRequested FTPFileobjects starting at the position preceding the current position ofthis iterator within its list and at least the number of elements whichexist in the list prior to its current position.



hasNext
public boolean hasNext()(Code)
Method for determining whether getNext() will successfully return a non-null value. true if there exist any files after the one currently pointedto by the internal iterator, false otherwise.



hasPrevious
public boolean hasPrevious()(Code)
Method for determining whether getPrevious() will successfully return a non-null value. true if there exist any files before the one currently pointedto by the internal iterator, false otherwise.



next
public FTPFile next()(Code)
Returns a single parsed FTPFile object corresponding to the raw input line at this iterator's current position. After this method is called the internal iterator is advanced by one element (unless already at end of list). a single FTPFile object corresponding to the raw input lineat the position of the internal iterator over the list of raw inputlines maintained by this object or null if no such object exists.



previous
public FTPFile previous()(Code)
Returns a single parsed FTPFile object corresponding to the raw input line at the position preceding that of the internal iterator over the list of raw lines maintained by this object After this method is called the internal iterator is retreated by one element (unless it is already at beginning of list). a single FTPFile object corresponding to the raw input lineat the position immediately preceding that of the internal iteratorover the list of raw input lines maintained by this object.



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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