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org.apache.commons.net.ftp

Class FTPFileList

public class FTPFileList
extends java.lang.Object
This class encapsulates a listing of files from an FTP server. It is initialized with an input stream which is read and the input split into lines, each of which (after some possible initial verbiage) represents a file on the FTP server. A parser is also supplied, which is used to iterate through the internal list of lines parsing each into an FTPFile object which is returned to the caller of the iteration methods. This parser may be replaced with another, allowing the same list to be parsed with different parsers. Parsing takes place on an as-needed basis, basically, the first time a position is iterated over. This happens at the time of iteration, not prior to it as the older (FTPClient.listFiles() methods did, which required a bigger memory hit.

See Also:
org.apache.commons.net.ftp.FTPClient.createFileList, FTPFileIterator, FTPFileEntryParser, FTPListParseEngine

Method Summary

static FTPFileList
create(InputStream stream, FTPFileEntryParser parser)
Deprecated. The version of this method which takes an encoding should be used.
static FTPFileList
create(InputStream stream, FTPFileEntryParser parser, String encoding)
The only way to create an FTPFileList object.
FTPFile[]
getFiles()
returns an array of FTPFile objects for all the files in the directory listing
FTPFileIterator
iterator()
create an iterator over this list using the parser with which this list was initally created
FTPFileIterator
iterator(FTPFileEntryParser parser)
create an iterator over this list using the supplied parser
void
readStream(InputStream stream)
Deprecated. The version of this method which takes an encoding should be used.
void
readStream(InputStream stream, String encoding)
internal method for reading the input into the lines vector.

Method Details

create

public static FTPFileList create(InputStream stream,
                                 FTPFileEntryParser parser)
            throws IOException

Deprecated. The version of this method which takes an encoding should be used.

The only way to create an FTPFileList object. Invokes the private constructor and then reads the stream supplied stream to build the intermediate array of "lines" which will later be parsed into FTPFile object.

Parameters:
stream - The input stream created by reading the socket on which the output of the LIST command was returned
parser - the default FTPFileEntryParser to be used by this object. This may later be changed using the init() method.

Returns:
the FTPFileList created, with an initialized of unparsed lines of output. Will be null if the listing cannot be read from the stream.

create

public static FTPFileList create(InputStream stream,
                                 FTPFileEntryParser parser,
                                 String encoding)
            throws IOException
The only way to create an FTPFileList object. Invokes the private constructor and then reads the stream supplied stream to build the intermediate array of "lines" which will later be parsed into FTPFile object.

Parameters:
stream - The input stream created by reading the socket on which the output of the LIST command was returned
parser - the default FTPFileEntryParser to be used by this object. This may later be changed using the init() method.
encoding - The encoding to use

Returns:
the FTPFileList created, with an initialized of unparsed lines of output. Will be null if the listing cannot be read from the stream.

getFiles

public FTPFile[] getFiles()
returns an array of FTPFile objects for all the files in the directory listing

Returns:
an array of FTPFile objects for all the files in the directory listinge

iterator

public FTPFileIterator iterator()
create an iterator over this list using the parser with which this list was initally created

Returns:
an iterator over this list using the list's default parser.

iterator

public FTPFileIterator iterator(FTPFileEntryParser parser)
create an iterator over this list using the supplied parser

Parameters:
parser - The user-supplied parser with which the list is to be iterated, may be different from this list's default parser.

Returns:
an iterator over this list using the supplied parser.

readStream

public void readStream(InputStream stream)
            throws IOException

Deprecated. The version of this method which takes an encoding should be used.

internal method for reading the input into the lines vector.

Parameters:
stream - The socket stream on which the input will be read.

readStream

public void readStream(InputStream stream,
                       String encoding)
            throws IOException
internal method for reading the input into the lines vector.

Parameters:
stream - The socket stream on which the input will be read.
encoding - The encoding to use.

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