Class: Bits::BitDeclaration

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

Overview

Class used to manage state of a bit declaration file.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data) ⇒ BitDeclaration

Returns a new instance of BitDeclaration.



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# File 'lib/bits/bit_declaration.rb', line 45

def initialize(data)
  @provider_data = parse_provider_data data
  @dependencies = parse_dependencies data
end

Instance Attribute Details

#dependencies ⇒ Object

Returns the value of attribute dependencies.



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# File 'lib/bits/bit_declaration.rb', line 43

def dependencies
  @dependencies
end

#provider_data ⇒ Object

Returns the value of attribute provider_data.



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# File 'lib/bits/bit_declaration.rb', line 43

def provider_data
  @provider_data
end

Class Method Details

.eval(reader) ⇒ Object 



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# File 'lib/bits/bit_declaration.rb', line 153

def self.eval(reader)
  data = YAML.load reader.read
  decl = self.new data
  decl
end

Instance Method Details

#depends(atom, params = {}) ⇒ Object 



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# File 'lib/bits/bit_declaration.rb', line 149

def depends(atom, params={})
  @dependencies[atom] = params
end

#parse_dependencies(data) ⇒ Object 



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# File 'lib/bits/bit_declaration.rb', line 103

def parse_dependencies(data)
  h = Hash.new

  depends = data[:depends]

  unless depends.nil?
    unless depends.kind_of? Array
      raise "Expected Array but got '#{depends.inspect}'"
    end

    depends.each do |item|
      unless item.kind_of? Hash
        raise "Expected Hash but got '#{item.inspect}'"
      end

      atom = item[:atom]

      if atom.nil?
        raise "Expected :atom to be not null in dependency"
      end

      unless h[atom].nil?
        raise "Dependency already specified: #{atom}"
      end

      h[atom] = BitDependency.new atom, item
    end
  end

  h
end

#parse_provider_data(data) ⇒ Object 



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# File 'lib/bits/bit_declaration.rb', line 50

def parse_provider_data(data)
  h = Hash.new

  provided_for = data[:provided_for]
  provided_by = data[:provided_by]

  unless provided_by.nil?
    unless provided_by.kind_of? Hash
      raise "Expected Hash but got '#{provided_by.inspect}'"
    end

    provided_by.each do |provider_id, parameters|
      unless parameters.kind_of? Hash
        raise "Expected Hash but got '#{parameters.inspect}'"
      end

      unless provider_id.kind_of? Symbol
        raise "Expected Symbol but got '#{provider_id.inspect}'"
      end

      unless h[provider_id].nil?
        raise "Provider already defined '#{provider_id}'"
      end

      h[provider_id] = BitParameters.new parameters
    end
  end

  unless provided_for.nil?
    unless provided_for.kind_of? Hash
      raise "Expected Hash but got '#{provided_for.inspect}'"
    end

    provided_for.each do |provider_id, reference|
      unless reference.kind_of? String
        raise "Expected String but got '#{reference.inspect}'"
      end

      unless provider_id.kind_of? Symbol
        raise "Expected Symbol but got '#{provider_id.inspect}'"
      end

      unless h[provider_id].nil?
        raise "Provider already defined '#{provider_id}'"
      end

      h[provider_id] = BitReference.new reference
    end
  end

  h
end

#provided_by(provider_id, params = {}) ⇒ Object

Used inside bit declaration.



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# File 'lib/bits/bit_declaration.rb', line 136

def provided_by(provider_id, params={})
  @provider_data[provider_id] = BitParameters.new params
end

#provided_for(params = {}) ⇒ Object

Used inside bit declaration. Defines that the following set of providers are provided by another bit.



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# File 'lib/bits/bit_declaration.rb', line 142

def provided_for(params={})
  params.each do |key, value|
    key = key.to_sym
    @provider_data[key] = BitReference.new value
  end
end