magpie.user

Class InputFileParser

java.lang.Object

magpie.user.InputFileParser

public class InputFileParser
extends java.lang.Object

Parses user input files. Contains operations that remove comments, blank lines, and combine words surrounded by quotation marks in order to supply the CommandHandler with clean commands. Can read from an input file or standard in (if no file is provided).

Note: If a user input a "" from standard in, the program will exit. I haven't figured out how to fix and let the program exit when an EOF is return from command line.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	fileIsOpen Whether an input file is open
protected java.io.BufferedReader	inputFile Reader holding the input file

Constructor Summary

Constructors

Constructor and Description
InputFileParser() Create an instance that reads from standard in.

Method Summary

Modifier and Type	Method and Description
void	closeFile() Closes currently open file.
java.util.List<java.lang.String>	getCommands() From the open input file, read in the next command.
void	openFile(java.lang.String filename) Open an input file
protected java.lang.String	readLine() Gets a complete, nonempty line out of the input stream.

Methods inherited from class java.lang.Object

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

Field Detail

inputFile

protected java.io.BufferedReader inputFile

Reader holding the input file

fileIsOpen

protected boolean fileIsOpen

Whether an input file is open

Constructor Detail

InputFileParser

public InputFileParser()

Create an instance that reads from standard in.

Method Detail

openFile

public void openFile(java.lang.String filename)

Open an input file

Parameters:

filename - File to be read as input

closeFile

public void closeFile()

Closes currently open file. If none open, returns quietly. Returns focus back to standard in.

getCommands

public java.util.List<java.lang.String> getCommands()

From the open input file, read in the next command.

Returns:

Command parsed into individual words. Null if no more input

readLine

protected java.lang.String readLine()

Gets a complete, nonempty line out of the input stream. Removes comments

Returns:

Complete line