com.enterprisedt.net.ftp

Class FTPInputStream

java.lang.Object

java.io.InputStream

com.enterprisedt.net.ftp.FileTransferInputStream

com.enterprisedt.net.ftp.FTPInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class FTPInputStream
extends FileTransferInputStream

Represents an input stream of bytes coming from an FTP server, permitting the user to download a file by reading the stream. It can only be used for one download, i.e. after the stream is closed it cannot be reopened.

Version:

$Revision: 1.1 $

Author:

Bruce Blackshaw

Constructor Summary

Constructors

Constructor and Description
FTPInputStream(FTPClient client, java.lang.String remoteFile) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closes this input stream and releases any system resources associated with the stream.
int	read() Reads the next byte of data from the input stream.
int	read(byte[] b, int off, int len) Reads up to len bytes of data from the input stream into an array of bytes.
void	setMonitor(FTPProgressMonitorEx monitor, long monitorInterval) The input stream uses the progress monitor currently owned by the FTP client.

Methods inherited from class com.enterprisedt.net.ftp.FileTransferInputStream

getRemoteFile

Methods inherited from class java.io.InputStream

available, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FTPInputStream

public FTPInputStream(FTPClient client,
              java.lang.String remoteFile)
               throws java.io.IOException,
                      FTPException

Constructor. A connected FTPClient instance must be supplied. This sets up the download

Parameters:

client - connected FTPClient instance

remoteFile - remote file

Throws:

java.io.IOException

FTPException

Method Detail

setMonitor

public void setMonitor(FTPProgressMonitorEx monitor,
              long monitorInterval)

The input stream uses the progress monitor currently owned by the FTP client. This method allows a different progress monitor to be passed in, or for the monitor interval to be altered.

Parameters:

monitor - progress monitor reference

monitorInterval -

read

public int read()
         throws java.io.IOException

Reads the next byte of data from the input stream. The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

read

public int read(byte[] b,
       int off,
       int len)
         throws java.io.IOException

Reads up to len bytes of data from the input stream into an array of bytes. An attempt is made to read as many as len bytes, but a smaller number may be read, possibly zero. The number of bytes actually read is returned as an integer. This method blocks until input data is available, end of file is detected, or an exception is thrown.

Overrides:

read in class java.io.InputStream

Parameters:

b - array to read into

off - offset into the array to start at

len - the number of bytes to be read

Returns:

the number of bytes read, or -1 if the end of the stream has been reached.

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Closes this input stream and releases any system resources associated with the stream. This must be called before any other operations are initiated on the FTPClient.

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.InputStream

Throws:

java.io.IOException - if an I/O error occurs.