Java GetOpt Generator 0.81.2

Java GetOpt Generator is a software that generates a command-line argument parser from an XML file.

Both a 'parser' and 'config' class are generated, which allows your program to either be launched from the command-line or programmatically configured and executed from another Java application.

GetOpt Generator is Self-Hosting meaning it uses itself to generate its command-line parser.

Configuration

You can look at GetOpt.xml, the XML used by GetOpt to generate its own command-line parser, for an example of what the XML configuration file should look like.

Basically each option gets:

name

Long name of the option. Separate logical words with "_" (i.e. long_opt)

short

Short (1 char) alias for the option

type

One of:

· boolean
· integer
· string
· input-file (verifies that file exists)
· input-dir (verifies that dir exists)
· output-file (treated as string for now)
· output-dir (treated as string for now)

Running GetOpt

Calling GetOpt with --help generates the following output

options for GetOpt :

[ --help | -? ]
( --xmlFile | -x ) xml_file
( --javaDir | -j ) java_dir
( --exeClass | -e ) exe_class
( --mainClass | -m ) main_class
( --configClass | -c ) config_class

NOTE: Options in brackets '[]' are optional.
All camel-case long opts can be represented using lowercase,
as well as with '-' or '_' seperating the camel-cased words
(i.e. --longOpt | --longopt | --long_opt | --long-opt)

xml_file

The XML file containing the configuration

main_class

The fully qualified name (package+class) of the generated class that will parse the command line (i.e. contains the main() method).

config_class

The fully qualified name (package_class) of the generated class that will store the config information.

java_dir

The base output directory (i.e. your src directory). The generated files will be stored in /java/dir/package/path/ClassName.java

exe_class

The Java class that the generated command-line parser should call after parsing the command line.

The exe class is expected to contain a constructor that accepts a config_class instance.

The exe class is expected to contain an execute() method, which will be called by the command-line parser.

It is the responsibility of the exe class to validate the parsed config, but the config_class is generated with a validate() function which does the heavy lifting.

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