com.knowgate.dfs
Class FileSystem

java.lang.Object
  com.knowgate.dfs.FileSystem

Direct Known Subclasses:

FileSystemWorkArea

public class FileSystem
extends java.lang.Object

Abstract FileSystem object for encasulating NFS and FTP file transfer.

FileSystem can work in 100% Pure Java mode or using native operating system atomic calls.

This is an alpha state testing module.

Field Summary

static int	OS_PUREJAVA
static int	OS_UNIX
static int	OS_WINDOWS
protected java.lang.String	SLASH

Constructor Summary

FileSystem()
Create new File System Operation mode will be Pure Java by default User and Password fro FTP access wil be readed from hipergate.cnf file

FileSystem(int iMode)
Create new File System Operation mode may be set for faster file access throught direct usage of operating system atomic calls.

FileSystem(int iMode, java.lang.String sUser, java.lang.String sPassword)
Create new File System

FileSystem(java.util.Properties oProps)

FileSystem(java.lang.String sUser, java.lang.String sPassword)
Create new File System Operation mode will be Pure Java by default

FileSystem(java.lang.String sUser, java.lang.String sPassword, java.lang.String sRealm)
Create new File System Operation mode will be Pure Java by default

Method Summary

static void	convert(java.lang.String sFilePath, java.lang.String sOldCharset, java.lang.String sNewCharset) Convert a text file from one character set to another The input file is overwritten.
boolean	copy(java.lang.String sSourceURI, java.lang.String sTargetURI) Copy a file This method is able to copy a file from local or network disk location to and FTP location or viceversa.
boolean	delete(java.lang.String sFullURI) Delete o file or directory Can recursively delete local or FTP directories
boolean	delete(java.lang.String sFullURI, java.lang.String sDeferedFiles) Mark an URI for deffered deletion Because web servers often cache and lock files as they are accessed, it is sometimes not possible to delete recently accessed files inmediately.
static java.lang.String	detectEncoding(java.io.File oFile, java.lang.String sDefault) Detect file encoding
java.lang.String	detectEncoding(java.lang.String sFilePath, java.lang.String sDefault) Detect file encoding
void	downloadhtmlpage(java.lang.String sBasePath, java.lang.String sFilePath, java.io.OutputStream oOutStrm) Download an HTML page and all its referenced files into a ZIP
boolean	exists(java.lang.String sSourceURI) Checks whether a file or directory exists
protected java.lang.String	file()
int	filelen(java.lang.String sFullURI) Get file length Currently only local and network files length can be queried
protected java.lang.String	host()
boolean	mkdirs(java.lang.String sFullURI) Create a complete directory branch.
boolean	move(java.lang.String sSourceURI, java.lang.String sTargetURI) Move a file from one location to another
void	os(int iOperatingSystem)
java.lang.String	password()
void	password(java.lang.String sPassword)
protected java.lang.String	path()
static char[]	readfile(java.lang.String sFilePath) Read a text file and returns a character array with it Enconding is UTF-8 by default
static char[]	readfile(java.lang.String sFilePath, java.lang.String sCharSet) Read a text file and returns a character array with it
byte[]	readfilebin(java.lang.String sFilePath) Read a binary file into a byte array
java.lang.Object	readfileobj(java.lang.String sFilePath) Read a serializable object from a text file
java.lang.String	readfilestr(java.lang.String sFilePath, java.lang.String sEncoding) Read a text file into a String
java.lang.String	realm()
boolean	rename(java.lang.String sSourceURI, java.lang.String sTargetURI) Rename file
boolean	rmdir(java.lang.String sFullURI) Remove a directory and all its subdirectories and files.
protected void	splitURI(java.lang.String sURI)
java.lang.String	user()
void	user(java.lang.String sUser)
void	writefilebin(java.lang.String sFilePath, byte[] aBytes) Write a byte array to a text file
void	writefileobj(java.lang.String sFilePath, java.io.Serializable oObj) Write a serializable object to a text file
void	writefilestr(java.lang.String sFilePath, java.lang.String sText, java.lang.String sEncoding) Write a String to a text file using given encoding

Methods inherited from class java.lang.Object

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

Field Detail

SLASH

protected java.lang.String SLASH

OS_PUREJAVA

public static final int OS_PUREJAVA

See Also:

Constant Field Values

OS_UNIX

public static final int OS_UNIX

See Also:

Constant Field Values

OS_WINDOWS

public static final int OS_WINDOWS

See Also:

Constant Field Values

Constructor Detail

FileSystem

public FileSystem()
           throws java.lang.NumberFormatException,
                  java.lang.IllegalArgumentException

Create new File System

Operation mode will be Pure Java by default

User and Password fro FTP access wil be readed from hipergate.cnf file

Throws:

java.lang.NumberFormatException - If javamode property is not a positive integer number.

java.lang.IllegalArgumentException - If javamode property is not 0, 1 or 2.

FileSystem

public FileSystem(int iMode)

Create new File System

Operation mode may be set for faster file access throught direct usage of operating system atomic calls.

User and Password fro FTP access wil be readed from hipergate.cnf file

Parameters:

iMode - Operation Mode { OS_PUREJAVA | OS_UNIX | OS_WINDOWS }

FileSystem

public FileSystem(java.lang.String sUser,
                  java.lang.String sPassword)

Create new File System

Operation mode will be Pure Java by default

Parameters:

sUser - User for FTP access

sPassword - Password for FTP access

FileSystem

public FileSystem(java.lang.String sUser,
                  java.lang.String sPassword,
                  java.lang.String sRealm)

Create new File System

Operation mode will be Pure Java by default

Parameters:

sUser - User for FTP access

sPassword - Password for FTP access

sRealm - Realm for HTTP authentication

Since:

4.0

FileSystem

public FileSystem(int iMode,
                  java.lang.String sUser,
                  java.lang.String sPassword)

Create new File System

Parameters:

iMode - Operation Mode: OS_PUREJAVA or OS_UNIX or OS_WINDOWS

sUser - User for FTP access

sPassword - Password for FTP access

FileSystem

public FileSystem(java.util.Properties oProps)
           throws java.lang.NumberFormatException,
                  java.lang.IllegalArgumentException

Parameters:

oProps - Properties collection.
Property names:
javamode : "0" (default) for Pure Java, "1" for UNIX, "2" for Windows.
fileuser : User for FTP access (default is "anonymous"). filepassword : Password for FTP access (default is "").

Throws:

java.lang.NumberFormatException - If javamode property is not a positive integer number.

java.lang.IllegalArgumentException - If javamode property is not 0, 1 or 2.

Method Detail

os

public void os(int iOperatingSystem)

Parameters:

iOperatingSystem - = { FileSystem.OS_PUREJAVA, FileSystem.OS_UNIX, FileSystem.OS_WINDOWS }

user

public void user(java.lang.String sUser)

Parameters:

sUser - user for FTP access

user

public java.lang.String user()

Returns:

user for FTP access.

password

public void password(java.lang.String sPassword)

Parameters:

sPassword - Password for FTP or HTTP access

password

public java.lang.String password()

Returns:

Password for FTP or HTTP access

realm

public java.lang.String realm()

Returns:

Realm for HTTP access

host

protected java.lang.String host()

path

protected java.lang.String path()

file

protected java.lang.String file()

splitURI

protected void splitURI(java.lang.String sURI)

copy

public boolean copy(java.lang.String sSourceURI,
                    java.lang.String sTargetURI)
             throws java.net.MalformedURLException,
                    java.io.IOException,
                    java.lang.Exception

Copy a file

This method is able to copy a file from local or network disk location to and FTP location or viceversa.

Parameters:

sSourceURI - Source URI, it must have the following syntax: protocol://[server:[port]]/path/filename Even whe working with local files protocol must be specified, ej. copy ("file:///tmp/upload/image.jpg", "file:///opt/storage/approved/image.jpg")

sTargetURI - Target URI

Throws:

java.lang.Exception

java.io.IOException

java.net.MalformedURLException

exists

public boolean exists(java.lang.String sSourceURI)
               throws java.io.IOException

Checks whether a file or directory exists

Parameters:

sSouceURI - Source URI (including protocol preffix)

Throws:

java.io.IOException

Since:

4.0

filelen

public int filelen(java.lang.String sFullURI)
            throws java.io.IOException

Get file length

Currently only local and network files length can be queried

Parameters:

sFullURI - File URI (protocol+path)

Returns:

File length in bytes

Throws:

java.io.IOException

rmdir

public boolean rmdir(java.lang.String sFullURI)
              throws java.io.IOException

Remove a directory and all its subdirectories and files.

Parameters:

sFullURI - Directory URI. For example: file:///tmp/upload

Returns:

true if Directory was successfully deleted. This return value should always be checked as Java functions may not return any error but not delete a directory that is in use by another process.

Throws:

java.io.IOException

delete

public boolean delete(java.lang.String sFullURI)
               throws java.io.IOException

Delete o file or directory

Can recursively delete local or FTP directories

Parameters:

sFullURI - File or directory URI. For example ftp://localhost/opt/temp/upload/logo.gif

Returns:

true if File or Directory was successfully deleted. This return value should always be checked as Java functions may not return any error but not delete a directory or file that is in use by another process.

Throws:

java.io.IOException

delete

public boolean delete(java.lang.String sFullURI,
                      java.lang.String sDeferedFiles)
               throws java.io.IOException

Mark an URI for deffered deletion

Because web servers often cache and lock files as they are accessed, it is sometimes not possible to delete recently accessed files inmediately. This method just appends the given URI at the end of a plain text file containing a list of file names. This file name list can be later used upon Web Server re-start for purging files that could no be deleted before because they where locked.

Parameters:

sFullURI - File URI to delete, ej. file:///opt/knowgate/files/deleteme.txt

sDeferedFiles - Local path to file containing delete list

Throws:

java.io.IOException

move

public boolean move(java.lang.String sSourceURI,
                    java.lang.String sTargetURI)
             throws java.lang.Exception,
                    java.io.IOException

Move a file from one location to another

Parameters:

sSourceURI - Source URI

sTargetURI - Target URI

Returns:

Throws:

java.lang.Exception

java.io.IOException

rename

public boolean rename(java.lang.String sSourceURI,
                      java.lang.String sTargetURI)
               throws java.lang.Exception,
                      java.io.IOException,
                      java.net.ProtocolException

Rename file

Parameters:

sSourceURI - Source URI (ej. "file:///tmp/files/oldfile.txt")

sTargetURI - Target URI (ej. "file:///tmp/files/newfile.txt")

Throws:

java.lang.Exception

java.io.IOException

java.net.ProtocolException - If source and target file does not use the same protocol, either file:// or ftp://

Since:

2.1

mkdirs

public boolean mkdirs(java.lang.String sFullURI)
               throws java.lang.Exception,
                      java.io.IOException

Create a complete directory branch.

Parameters:

sFullURI - Full path of directory to create, ej. file:///tmp/uploads/binaries/images ej. ftp://ftpserver/tmp/uploads/binaries/images

Throws:

java.lang.Exception

java.io.IOException

convert

public static void convert(java.lang.String sFilePath,
                           java.lang.String sOldCharset,
                           java.lang.String sNewCharset)
                    throws java.io.FileNotFoundException,
                           java.io.IOException,
                           java.io.UnsupportedEncodingException

Convert a text file from one character set to another

The input file is overwritten.

Parameters:

sFilePath - File Path

sOldCharset - Original file character set

sNewCharset - New character set

Throws:

java.io.FileNotFoundException

java.io.IOException

java.io.UnsupportedEncodingException

detectEncoding

public static java.lang.String detectEncoding(java.io.File oFile,
                                              java.lang.String sDefault)
                                       throws java.io.FileNotFoundException,
                                              java.io.IOException

Detect file encoding

Parameters:

oFile - File

sDefault - String Character encoding to be returned if no clear character encoding was identified

Returns:

String UTF-16LE, UTF-16BE or UTF-8

Throws:

java.io.FileNotFoundException

java.io.IOException

Since:

3.1

detectEncoding

public java.lang.String detectEncoding(java.lang.String sFilePath,
                                       java.lang.String sDefault)
                                throws java.io.FileNotFoundException,
                                       java.io.IOException,
                                       com.enterprisedt.net.ftp.FTPException

Detect file encoding

Parameters:

sFilePath - File Path including protocol. Like "file:///tmp/myfile.txt" or "ftp://myhost:21/dir/myfile.txt"

sDefault - String Character encoding to be returned if no clear character encoding was identified

Returns:

String UTF-16LE, UTF-16BE or UTF-8

Throws:

java.io.FileNotFoundException

java.io.IOException

com.enterprisedt.net.ftp.FTPException

Since:

3.1

readfile

public static char[] readfile(java.lang.String sFilePath)
                       throws java.io.FileNotFoundException,
                              java.io.IOException,
                              java.lang.OutOfMemoryError,
                              com.enterprisedt.net.ftp.FTPException

Read a text file and returns a character array with it

Enconding is UTF-8 by default

Parameters:

sFilePath - Full path of file to be readed. Like "file:///tmp/myfile.txt" or "ftp://myhost:21/dir/myfile.txt"

Returns:

character array with full contents of file

Throws:

java.io.FileNotFoundException

java.io.IOException

java.lang.OutOfMemoryError

com.enterprisedt.net.ftp.FTPException

readfile

public static char[] readfile(java.lang.String sFilePath,
                              java.lang.String sCharSet)
                       throws java.io.FileNotFoundException,
                              java.io.IOException,
                              java.lang.OutOfMemoryError,
                              com.enterprisedt.net.ftp.FTPException

Read a text file and returns a character array with it

Parameters:

sFilePath - Full path of file to be readed. Like "file:///tmp/myfile.txt" or "ftp://myhost:21/dir/myfile.txt"

sCharSet - Encoding character set name

Returns:

character array with full contents of file

Throws:

java.io.FileNotFoundException

java.io.IOException

java.lang.OutOfMemoryError

com.enterprisedt.net.ftp.FTPException

readfilebin

public byte[] readfilebin(java.lang.String sFilePath)
                   throws java.net.MalformedURLException,
                          com.enterprisedt.net.ftp.FTPException,
                          java.io.FileNotFoundException,
                          java.io.IOException,
                          java.lang.OutOfMemoryError

Read a binary file into a byte array

Parameters:

sFilePath - Full path of file to be readed. Like "file:///tmp/myfile.txt" or "ftp://myhost:21/dir/myfile.txt"

Returns:

byte array with full contents of file

Throws:

java.io.FileNotFoundException

java.io.IOException

java.lang.OutOfMemoryError

java.net.MalformedURLException

com.enterprisedt.net.ftp.FTPException

readfilestr

public java.lang.String readfilestr(java.lang.String sFilePath,
                                    java.lang.String sEncoding)
                             throws java.net.MalformedURLException,
                                    com.enterprisedt.net.ftp.FTPException,
                                    java.io.FileNotFoundException,
                                    java.io.IOException,
                                    java.lang.OutOfMemoryError

Read a text file into a String

Parameters:

sFilePath - Full path of file to be readed. Like "file:///tmp/myfile.txt" or "ftp://myhost:21/dir/myfile.txt"

sEncoding - Text Encoding for file {UTF-8, ISO-8859-1, ...}
if null then if first two bytes of file are FF FE then UTF-8 will be assumed
else ISO-8859-1 will be assumed.

Returns:

String with full contents of file

Throws:

java.io.FileNotFoundException

java.io.IOException

java.lang.OutOfMemoryError

java.net.MalformedURLException

com.enterprisedt.net.ftp.FTPException

writefilestr

public void writefilestr(java.lang.String sFilePath,
                         java.lang.String sText,
                         java.lang.String sEncoding)
                  throws java.io.IOException,
                         java.lang.OutOfMemoryError

Write a String to a text file using given encoding

Parameters:

sFilePath - Full file path. For example "file:///tmp/myfile.txt" or "ftp://localhost:21/tmp/myfile.txt"

sText - String to be written

sEncoding - Encoding to be used see Java Supported Encodings

Throws:

java.io.IOException

java.lang.OutOfMemoryError

writefilebin

public void writefilebin(java.lang.String sFilePath,
                         byte[] aBytes)
                  throws java.io.IOException

Write a byte array to a text file

Parameters:

sFilePath - Full file path. For example "file:///tmp/myfile.bin" or "ftp://localhost:21/tmp/myfile.bin"

aBytes - Bytes to be written

Throws:

java.io.IOException

Since:

3.0

readfileobj

public java.lang.Object readfileobj(java.lang.String sFilePath)
                             throws java.net.MalformedURLException,
                                    java.io.FileNotFoundException,
                                    java.io.IOException,
                                    com.enterprisedt.net.ftp.FTPException,
                                    java.lang.ClassNotFoundException

Read a serializable object from a text file

Parameters:

sFilePath - Full file path. For example "file:///tmp/myfile.bin" or "ftp://localhost:21/tmp/myfile.bin"

Throws:

java.net.MalformedURLException - if sFilePath does not begin with file://or ftp://

java.lang.ClassNotFoundException

java.io.FileNotFoundException

java.io.IOException

com.enterprisedt.net.ftp.FTPException

Since:

4.0

writefileobj

public void writefileobj(java.lang.String sFilePath,
                         java.io.Serializable oObj)
                  throws java.io.IOException

Write a serializable object to a text file

Parameters:

sFilePath - Full file path. For example "file:///tmp/myfile.bin" or "ftp://localhost:21/tmp/myfile.bin"

oObj - Serializable object to be written

Throws:

java.io.IOException

Since:

4.0

downloadhtmlpage

public void downloadhtmlpage(java.lang.String sBasePath,
                             java.lang.String sFilePath,
                             java.io.OutputStream oOutStrm)
                      throws java.io.IOException

Download an HTML page and all its referenced files into a ZIP

Parameters:

sBasePath - String Base path for page and its referenced files

sFilePath - String File path from sBasePath

oOutStrm - OutputStream where ZIP is written

Throws:

java.io.IOException

Since:

5.5