Difference between revisions of "Eiffel Visitor Factory Tool"

Revision as of 14:08, 21 November 2006

1 Overview
2 Command-line Options
3 Sample Output
4 Information
5 Change Log

Overview

The Eiffel Visitor Factory Tool is a simple command line application to generate Eiffel visitor patterns based on Eiffel classes found at specified folder locations. It can generate an interface (deferred) and/or stub (effective) Eiffel classes in no time.

Command-line Options

By default the tool will look in the current working directory for Eiffel source files (*.e). If you want to specify alternative locations use the -i switch to specify relative or absolute directory or file paths. If you need to exclude files use the -ex switch to specify what files to exclude.

To exclude a files in the current directory that start with status you would call:

vfact -ex "/status.*\.e$"

You can optionally search all specified directories recursively using the -r switch.

For all other options please read the usage help using the -?

Sample Output

As an example of what the tool generates, imagine the tool running in a directory containing two classes - ERROR_A and ERROR_B:

class ERROR_A
    --
end

class ERROR_B
    --
end

Running the tool in with the default settings will produce an interface class:

deferred class
	GENERATED_VISITOR
 
feature -- Processing
 
	process_error_a (a_value: ERROR_A)
			-- Process object `a_error_a'.
		require
			a_error_a_attached: error_a /= Void
		deferred
		end
 
	process_error_b (a_value: ERROR_B)
			-- Process object `a_error_b'.
		require
			a_error_b_attached: error_b /= Void
		deferred
		end
 
end -- class {GENERATED_VISITOR}

And a stub class:

class
	GENERATED_VISITOR_IMPL
 
inherit
	GENERATED_VISITOR
		redefine
			process_error_a,
			process_error_b
		end
 
feature -- Processing
 
	process_error_a (a_value: ERROR_A)
			-- Process object `a_error_a'.
		do
			check not_impl: False end
		end
 
	process_error_b (a_value: ERROR_B)
			-- Process object `a_error_b'.
		do
			check not_impl: False end
		end
 
end -- class {GENERATED_VISITOR_IMPL}