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org.mitre.cvw
Class FileHandler  

java.lang.Object
  org.mitre.cvw.FileHandler

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public class FileHandler

extends java.lang.Object

File system interface for Java Client. This class provides a generic file interface, regardless whether the file is text or binary. The file can either be opened for writing or reading, but not both (bad things happen). If opened for reading, only the read streams will be created. Likewise, only the write streams will be initialized if the file is opened for writing. Certain functions will be available depending on whether the file is text or binary.

For text files, the methods available are:

• writeFile(String)
• readFile()
• getLastRead()
• getFileSize()
• close()

And for binary files, the available functions are:

• writeFile(byte[], int)
• readFile(int)
• getLastRead()
• getFileSize()
• close()

Version:

1

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Field Summary
(package private)  boolean	binary_file
(package private)  java.io.BufferedInputStream	file_input
(package private)  java.io.BufferedOutputStream	file_output
(package private)  int	last_read
(package private)  java.io.File	open_file
(package private)  java.io.BufferedReader	text_input
(package private)  java.io.PrintWriter	text_output
(package private)  boolean	write_file

 

Constructor Summary

FileHandler(java.lang.String path, boolean binary, boolean write_to_file)           Constructor

 

Method Summary
boolean	close()           Closes any open streams
boolean	closeReader()           Closes any open reading streams
boolean	closeWriter()           Closes any open writer streams
long	getFileSize()           Get the size of the file that will be read
int	getLastRead()           Gets the size from the last read function (text or binary)
(package private)  void	openReader()           method to set up the streams to read from a file
(package private)  void	openWriter()           method to intialize the streams for writing to a file
java.lang.String	readFile()           Reads a line from a text file
byte[]	readFile(int size)           Reads a specified number of bytes from a binary file
int	writeFile(byte[] b, int len)           Writes a specified number of bytes to a binary file
int	writeFile(java.lang.String line)           method for writing a string to a text file.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

open_file

java.io.File open_file

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file_input

java.io.BufferedInputStream file_input

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file_output

java.io.BufferedOutputStream file_output

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text_input

java.io.BufferedReader text_input

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text_output

java.io.PrintWriter text_output

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binary_file

boolean binary_file

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write_file

boolean write_file

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last_read

int last_read

Constructor Detail

FileHandler

public FileHandler(java.lang.String path,
                   boolean binary,
                   boolean write_to_file)
            throws java.io.FileNotFoundException,
                   java.io.IOException

Constructor

Method Detail

openReader

void openReader()
          throws java.io.FileNotFoundException

method to set up the streams to read from a file

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openWriter

void openWriter()
          throws java.io.IOException

method to intialize the streams for writing to a file

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close

public boolean close()

Closes any open streams

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closeReader

public boolean closeReader()

Closes any open reading streams

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closeWriter

public boolean closeWriter()

Closes any open writer streams

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writeFile

public int writeFile(java.lang.String line)

method for writing a string to a text file. The function will add a line break to the end of the string when written to the file

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writeFile

public int writeFile(byte[] b,
                     int len)

Writes a specified number of bytes to a binary file

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readFile

public byte[] readFile(int size)

Reads a specified number of bytes from a binary file

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readFile

public java.lang.String readFile()

Reads a line from a text file

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getLastRead

public int getLastRead()

Gets the size from the last read function (text or binary)

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getFileSize

public long getFileSize()

Get the size of the file that will be read

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