com.isti.util

Class FileProcessor

java.lang.Object

com.isti.util.FileProcessor

public class FileProcessor
extends java.lang.Object

Class FileProcessor helper class for processing a text input file into a text output file.

Field Summary

Fields

Modifier and Type	Field and Description
java.io.BufferedReader	inputReaderObj Reader object for input file.
java.io.PrintWriter	outputWriterObj Writer object for output file.

Constructor Summary

Constructors

Constructor and Description
FileProcessor(java.lang.String inFName, java.lang.String outFName) Creates a file processor object and opens input and output files.

Method Summary

Modifier and Type	Method and Description
void	closeInputFile() Closes the input file.
void	closeOutputFile() Closes the output file.
java.lang.String	readNextLine() Reads and returns the next line of data from the input file.
void	writeNextLine(java.lang.String str) Writes the given line of data to the output file.

Methods inherited from class java.lang.Object

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

Field Detail

inputReaderObj

public java.io.BufferedReader inputReaderObj

Reader object for input file.

outputWriterObj

public java.io.PrintWriter outputWriterObj

Writer object for output file.

Constructor Detail

FileProcessor

public FileProcessor(java.lang.String inFName,
                     java.lang.String outFName)
              throws java.io.FileNotFoundException,
                     java.io.IOException

Creates a file processor object and opens input and output files.

Parameters:

inFName - name of input text file to use.

outFName - name of output text file to use.

Throws:

java.io.FileNotFoundException - if the input file is not found.

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

Method Detail

readNextLine

public java.lang.String readNextLine()
                              throws java.io.IOException

Reads and returns the next line of data from the input file. When the end of the input file is reached, the input and output files are closed and 'null' is returned.

Returns:

A string containing a line of data from the input file, or null if the end of the input file has been reached.

Throws:

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

writeNextLine

public void writeNextLine(java.lang.String str)
                   throws java.io.IOException

Writes the given line of data to the output file. A line-end is appended to the data written to the file.

Parameters:

str - a string containing the line of data to be written.

Throws:

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

closeInputFile

public void closeInputFile()

Closes the input file. This method does not usually need to be called because the 'readNextLine()' method closes the input and output file after it reaches the end of the input file.

closeOutputFile

public void closeOutputFile()

Closes the output file. This method does not usually need to be called because the 'readNextLine()' method closes the input and output file after it reaches the end of the input file.