Class: J2119::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/j2119/parser.rb

Constant Summary collapse

ROOT = 
Regexp.new('This\s+document\s+specifies\s+' +
'a\s+JSON\s+object\s+called\s+an?\s+"([^"]+)"\.')

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(j2119_file) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/j2119/parser.rb', line 26

def initialize(j2119_file)

  have_root = false
  @failed = false
  @constraints = RoleConstraints.new
  @finder = RoleFinder.new
  @allowed_fields = AllowedFields.new
  
  j2119_file.each_line do |line|
    if line =~ ROOT
      if have_root
        fail "Only one root declaration"
      else
        @root = $1
        @matcher = Matcher.new(root)
        @assigner =
          Assigner.new(@constraints, @finder, @matcher, @allowed_fields)
        have_root = true
      end
    else
      if !have_root
        fail "Root declaration must come first"
      else
        proc_line(line)
      end
    end
  end
  if @failed
    raise "Could not create parser"
  end
end

Instance Attribute Details

#finder ⇒ Object (readonly)

for debugging



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# File 'lib/j2119/parser.rb', line 24

def finder
  @finder
end

#root ⇒ Object (readonly)

Returns the value of attribute root.



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# File 'lib/j2119/parser.rb', line 21

def root
  @root
end

Instance Method Details

#allows_any?(roles) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/j2119/parser.rb', line 101

def allows_any?(roles)
  @allowed_fields.any?(roles)
end

#fail(message) ⇒ Object 



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# File 'lib/j2119/parser.rb', line 76

def fail(message)
  @failed = true
  STDERR.puts message
end

#field_allowed?(roles, child) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/j2119/parser.rb', line 97

def field_allowed?(roles, child)
  @allowed_fields.allowed?(roles, child)
end

#find_child_roles(roles, name) ⇒ Object 



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# File 'lib/j2119/parser.rb', line 89

def find_child_roles(roles, name)
  @finder.find_child_roles(roles, name)
end

#find_grandchild_roles(roles, name) ⇒ Object 



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# File 'lib/j2119/parser.rb', line 85

def find_grandchild_roles(roles, name)
  @finder.find_grandchild_roles(roles, name)
end

#find_more_roles(node, roles) ⇒ Object 



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# File 'lib/j2119/parser.rb', line 81

def find_more_roles(node, roles)
  @finder.find_more_roles(node, roles)
end

#get_constraints(role) ⇒ Object 



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# File 'lib/j2119/parser.rb', line 93

def get_constraints(role)
  @constraints.get_constraints(role)
end

#proc_line(line) ⇒ Object 



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# File 'lib/j2119/parser.rb', line 58

def proc_line(line)
  if @matcher.is_constraint_line(line)
    @assigner.assign_constraints @matcher.build_constraint(line)
  elsif @matcher.is_only_one_match_line(line)
    @assigner.assign_only_one_of(@matcher.build_only_one(line))
  elsif line =~ /^Each of a/
    eaches_line = @matcher.eachof_match.match(line)
    eaches = Oxford.break_role_list(@matcher, eaches_line['each_of'])
    eaches.each do |each|
      proc_line("A #{each} #{eaches_line['trailer']}")
    end
  elsif @matcher.is_role_def_line(line)
    @assigner.assign_roles @matcher.build_role_def(line)
  else
    fail "Unrecognized line: #{line}"
  end
end