Ruby Yaml to Enum - Revision history

Egge at 06:49, 9 October 2009

2009-10-09T06:49:26Z

← Older revision		Revision as of 06:49, 9 October 2009
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			Generate Java 1.5 enums from a YAML file

	<geshi lang="ruby">		<geshi lang="ruby">
	#!/bin/env ruby		#!/bin/env ruby

Egge at 06:46, 9 October 2009

2009-10-09T06:46:07Z

← Older revision		Revision as of 06:46, 9 October 2009
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	[[Category:Ruby\|Yaml to Enum]]		[[Category:Ruby\|Yaml to Enum]]
			[[Category:Java]]

Egge at 00:41, 31 July 2008

2008-07-31T00:41:34Z

← Older revision		Revision as of 00:41, 31 July 2008
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	</pre>		</pre>

	[[Category:Ruby]]		[[Category:Ruby\|Yaml to Enum]]

Egge at 00:39, 31 July 2008

2008-07-31T00:39:19Z

← Older revision		Revision as of 00:39, 31 July 2008
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	<~~pre~~>		<geshi lang="ruby">
	#!/bin/env ruby		#!/bin/env ruby
	#		#
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	end		end
	end		end
	</~~pre~~>		</geshi>

	Sample Colors.yml		Sample Colors.yml
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	- blue		- blue
	</pre>		</pre>

			[[Category:Ruby]]

Brianegge at 01:27, 22 May 2007

2007-05-22T01:27:35Z

New page

<pre>
#!/bin/env ruby
#
# Single value enums are frequently needed and they usually require additional code to lookup or access the enum
# based on a value. This Ruby script generates a .java enum based on a YAML input file
#
require 'yaml'
require 'erb'

def java_name(s)
s.upcase.gsub('/', '_')
end

template = ERB.new <<-EOF
package <%= @package %>;

public enum <%= @enum %> {
EMPTY(""),<% @enums.each do |i| %>
<%= java_name(i) %>("<%= i %>")<%= (i == @enums[-1]) ? ';' : ',' %><% end %>

private final String value;

<%= @enum %>(String value) {
this.value = value;
}

@Override
public String toString() {
return value;
}

public static <%= @enum %> getValue(String value) {
for (<%= @enum %> e : values()) {
if (e.value.equals(value)) {
return e;
}
}
return EMPTY;
}

}

EOF

if ARGV.size == 0 then
srcDir = 'C:\\dev\\src\\java\\com'
destDir = 'C:\\dev\\generated-src\\java\\com'
else
srcDir = ARGV[0]
destDir = ARGV[1]
end

class Fields
attr_accessor :enums, :name, :package, :enum
def initialize(file)
@name = /(com.*)/.match( file.gsub('\\', '.').gsub('/', '.') )[1].gsub(/\.yml$/, '.java')
@package = @name.split('.')[0..-3].join('.')
@enum = @name.split('.')[-2]
end
# Support templating of member data.
def get_binding
binding
end
end

if !File.directory?(destDir) then
Dir.mkdir(destDir)
end

Dir.entries(srcDir).select{|f| File.file?(File.join(srcDir, f)) && File.extname(f) == ".yml" }.each do |f|

file = File.join(srcDir, f)

data = Fields.new(file)
File.open( file, "r" ) do |yf|
data.enums = YAML::load( yf )
output = template.result(data.get_binding)
destFile = File.join(destDir, data.enum + '.java')
if !File.exists?(destFile) || File.read(destFile) != output then
File.open(destFile, 'a+') do |dest|
dest.write output
dest.truncate(dest.pos)
end
puts "Updated #{destFile}"
else
puts "#{destFile} is up to date"
end
end
end
</pre>

Sample Colors.yml
<pre>
- red
- green
- blue
</pre>