Class: Umlify::ParserSexp

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

Overview

Parses files using S-Expressions given by the RubyParser gem

* type of @classes: 0..* UmlClass

Instance Method Summary collapse

Constructor Details

#initialize(files) ⇒ ParserSexp

files should be an array containing file names with the correct path



12
13
14
15
 
# File 'lib/umlify/parser_sexp.rb', line 12

def initialize files
  @files = files
  @classes = []
end

Instance Method Details

#each_association_for(a_class) ⇒ Object

Yields the variable, the type and the cardinality for each associations



88
89
90
91
92
93
94
95
96
97
98
 
# File 'lib/umlify/parser_sexp.rb', line 88

def each_association_for a_class
  if comments = a_class.comments
    comments.split(/\n/).each do |line|
      line.match(/type of @([\w]*): ([0-9.\*n]* )?([\w]*)\b/) do |m|

        yield m[1], m[3], (m[2].chop if m[2])

      end
    end
  end
end

#parse_class(class_s_exp) ⇒ Object

Creates a UmlClass from a class s-expression



53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
 
# File 'lib/umlify/parser_sexp.rb', line 53

def parse_class class_s_exp
  uml_class = UmlClass.new class_s_exp[1].to_s

  # Let's start by building the associations of the class
  each_association_for class_s_exp do |variable, type, cardinality|
    uml_class.associations[variable] = type
    uml_class.associations[variable+'-n'] = cardinality if cardinality
  end

  # Searching for a s(:const, :Const) right after the class name, which
  # means the class inherits from a parents class, :Const
  if class_s_exp[2] and class_s_exp[2][0] == :const
    uml_class.parent = class_s_exp[2][1].to_s
  elsif class_s_exp[2] and class_s_exp[2][0] == :colon2
    # If the parent class belongs to a module
    uml_class.parent = class_s_exp[2][2].to_s
  end

  # Looks-up for instance methods
  class_s_exp.each_of_type :defn do |instance_method|
    uml_class.methods << instance_method[1].to_s

    # Now looking for @variables, inside instance methods
    # I'm looking at assignments such as @var = x
    instance_method.each_of_type :iasgn do |assignment|
      if assignment[1] and assignment[1].class == Symbol and assignment[1].to_s =~ /@/
        variable = assignment[1].to_s.gsub('@', '')
        uml_class.variables << variable unless uml_class.variables.include? variable
      end
    end
  end
  uml_class
end

#parse_file(file_content) ⇒ Object

Parse the given string, and return the parsed classes



36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
 
# File 'lib/umlify/parser_sexp.rb', line 36

def parse_file file_content
  classes = []

  s_exp = RubyParser.new.parse(file_content)

  if s_exp[0] == :class
    classes << parse_class(s_exp)
  else
    s_exp.each_of_type :class do |a_class|
      classes << parse_class(a_class)
    end
  end

  classes
end

#parse_sources! ⇒ Object

Parses the source code of the files in @files to build uml classes. Returns an array containing all the parsed classes or nil if no ruby file were found in the



21
22
23
24
25
26
27
28
29
30
31
32
33
 
# File 'lib/umlify/parser_sexp.rb', line 21

def parse_sources!

  @source_files = @files.select {|f| f.match /\.rb/}
  return nil if @source_files.empty?

  @source_files.each do |file|
    puts "processing #{file}..."
    (parse_file File.read(file)).each {|c| @classes << c}
  end

  # Removes duplicates between variables and associations in the class
  @classes.each {|c| c.chomp! @classes}
end