Package gov.nih.nlm.nls.lvg.CmdLineSyntax

Provides Java classes necessary to create a command line system.

See:
Description

Class Summary

Option	The class Option represents an object of a command line system.
OptionFlag	This class OptionFlag represents an object of an option flag.
OptionItem	This class represnets the basic elements of an option list.
OptionList	This OptionList class includes basic operations for a option list.
OptionMain	This class provides an example of using CmdLineSyntax package and OptionTest.
OptionTest	This class demostrates how to customize a specific command line syntax by using this package.
OptionUtility	This class provides utility functions for Option operations.
SystemOption	This is an abstract class for all systems to use and setup system command line syntax.

Package gov.nih.nlm.nls.lvg.CmdLineSyntax Description

Provides Java classes necessary to create a command line system.

This package provides an API for build a command line system (up to five levels). Baiscally, a command is composed of program and options. An option is a linked list composed of option items. An option item composed by option flags and opotin arguments.

Features

Belows are some features of this package:

• The system option can be flexibly assigned by defining a String.
• The syntax of an input command can be checked automatically by the system.
• Possible command(s) will be suggested by the system if there is an error on the input option. Two types of system options are suggested:
  • An optionItem with same level as the input option where first error happens.
  • An optionItem includes the input option item where error happens.
• Each optionFlag has tow names, abbreviation and full name.
• Provides methods for converting abbreviation name and full name of flags for optinItem.
• Provdies methods of printing hierarchy structure of a given option.
• Provides methods of printing all optionItems.

Usage

• Includes this package (import Lvg.CmdLineSyntax.*)
• Create a class, e.g. foo, and make it extends SystemOption (refer to OptionTest)
• Define the system option flag by defining an option string in DefineFlag().
• Define all flag full name (if any) in DefineFlag() in foo.
• Define what to do for each option in ExecuteCommand() in foo.
• Define main() in foo.
• Define help menu for each option if needed.

Related Documents

• Design Document

Since:

2002