Class: SlashPort::Check

Inherits:
Object
  • Object
show all
Defined in:
lib/slashport.rb

Overview

class SlashPort::Check

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, cmp, value) ⇒ Check

Returns a new instance of Check.



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# File 'lib/slashport.rb', line 10

def initialize(name, cmp, value)
  @name = name
  @value = value
  @cmpstr = cmp
  case cmp
  when ">="
    @cmp = Proc.new { |v| v >= coerce(v, @value) }
  when "<="
    @cmp = Proc.new { |v| v <= coerce(v, @value) }
  when "=="
    @cmp = Proc.new { |v| v == coerce(v, @value) }
  when "!="
    @cmp = Proc.new { |v| v != coerce(v, @value) }
  when "<"
    @cmp = Proc.new { |v| v < coerce(v, @value) }
  when ">"
    @cmp = Proc.new { |v| v > coerce(v, @value) }
  else
    raise "Unknown comparison '#{cmp}'"
  end
end

Class Method Details

.new_from_string(value) ⇒ Object

Turn a string “name cmp value” into a Check. Valid cmp are <, >, <=, >=, and ==



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# File 'lib/slashport.rb', line 45

def self.new_from_string(value)
  return nil unless value =~ /^([A-z0-9_-]+)\s*((?:[><=!]=)|[<>])\s*(.*)$/
  return SlashPort::Check.new($1, $2, $3)
end

Instance Method Details

#coerce(a, b) ⇒ Object

if ‘a’ is an int or float, try to convert b to the same thing



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# File 'lib/slashport.rb', line 37

def coerce(a, b)
  return b.to_i if a.is_a?(Integer)
  return b.to_f if a.is_a?(Float)
  return b
end

#match?(attribute) ⇒ Boolean

Given an attribute, does this check match?

Returns:

  • (Boolean) 


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# File 'lib/slashport.rb', line 51

def match?(attribute)
  match = false
  ["data", "labels"].each do |type|
    if (attribute[type].has_key?(@name) and @cmp.call(attribute[type][@name]))
      match = true
      return match
    end
  end
  return match
end

#to_s ⇒ Object

def initialize



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# File 'lib/slashport.rb', line 32

def to_s
  return "#{@name} #{@cmpstr} #{@value}"
end