Is there a class that is equivalent to Properties in Java

[Olivia Dou]

Is there a class in the ruby lib that is equivalent to Properties class
in Java?

 

[Robert Klemme]

Is there a class in the ruby lib that is equivalent to Properties class
in Java?

Hash.

robert

 

[Devin Mullins]

Is there a class in the ruby lib that is equivalent to Properties class
in Java?

If you can read something that can parse and emit Java .properties
files, then no, not in standard ruby, and a quick google doesn't find much.

You can hack something together...
IO.readlines('some.properties').reject{|l|l=~/^\s*#/}.
map{|l|l.split('=',2)}
But I'm sure that misses a whole buncha edge cases, like backslash
escaping, and Ant-style property substitution.

If you mean some way to parse/emit key/value parse from/to a
human-readable format... Hash and YAML.

Devin

 

[James Edward Gray II]

Is there a class in the ruby lib that is equivalent to Properties
class
in Java?

I think the following code should cover most of the Properties class
features:

#!/usr/bin/env ruby -w

require "forwardable"
require "yaml"

class Properties
def self.load(file_path)
File.open(file_path) { |file| YAML.load(file) }
end

def initialize
@properties = Hash.new
@defaults = nil
end

attr_accessor :defaults

extend Forwardable
def_delegator properties, :[]=

def [](property)
if @defaults and not @properties.include? property
@defaults[property]
else
@properties[property]
end
end

def save(file_path)
File.open(file_path, "w") { |file| YAML.dump(self, file) }
end
end

__END__

Hope that helps.

James Edward Gray II