Package com.nt.udc.util

Class CommandLineParser

java.lang.Object

com.nt.udc.util.CommandLineParser

public class CommandLineParser
extends Object

This class is for parsing command lines, as typed by a user to a Java program. The CommandLineParser organizes the command line into a series of settings and values for easier querying by the actual program. The CommandLineParser groups the incoming command line into two types of settings: - switches (settings without values) - options (settings with values) For example, a switch that turns on large font may look like this: "-bigfont". and an option that sets a configuration file may be: "-cfgfile /homedir/cfg.txt" When instantiating the CommandLineParser, it expects to be told what the valid switches and options are, so that it can inform the user when they have entered a bad command line. An example of a command line follows, assuming the switches and options are supported: java com.nt.udc.myProgram -file /homedir/file.txt -output . -nowarnings -noinfo

Constructor Summary

Constructors

Constructor	Description
CommandLineParser(String[] commandLine, String[] switches, String[] options)	Given a command line, valid switches and valid options, initialize this parser.

Method Summary

Modifier and Type	Method	Description
int	getOptionCount()
String	getOptionValue(String optionStr)	Given the option setting, return its value.
int	getSwitchCount()
boolean	isOptionDefined(String optionStr)	Returns whether this option was used on the command line.
boolean	isSwitchDefined(String switchStr)	Returns whether this switch was used on the command line.
boolean	parseCommandLine()	Parses the command line, and returns whether the parse was successful.

Methods inherited from class java.lang.Object

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

Constructor Details

CommandLineParser

public CommandLineParser(String[] commandLine,
 String[] switches,
 String[] options)

Given a command line, valid switches and valid options, initialize this parser.

Parameters:

commandLine - Command line to parse

switches - valid switches

options - valid options

Method Details

parseCommandLine

public boolean parseCommandLine()

Parses the command line, and returns whether the parse was successful.

Returns:

true, if parsing was successful

getOptionValue

public String getOptionValue(String optionStr)

Given the option setting, return its value.

Parameters:

optionStr - Name of option

Returns:

option's value, or null if no option found

isSwitchDefined

public boolean isSwitchDefined(String switchStr)

Returns whether this switch was used on the command line.

Parameters:

switchStr - Name of switch

Returns:

true, if switch was used

isOptionDefined

public boolean isOptionDefined(String optionStr)

Returns whether this option was used on the command line.

Parameters:

optionStr - Name of option

Returns:

true, if option was used

getSwitchCount

public int getSwitchCount()

getOptionCount

public int getOptionCount()