Class: Nexml::Handler

Inherits:
Object
  • Object
show all
Includes:
REXML::StreamListener
Defined in:
lib/nexml.rb

Overview

code to read the file, the lexer/parser

Instance Method Summary collapse

Constructor Details

#initialize(obj) ⇒ Handler

Returns a new instance of Handler.



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# File 'lib/nexml.rb', line 34

def initialize(obj)
  @obj = obj
end

Instance Method Details

#tag_start(name, attrs) ⇒ Object

hit at the start of an element tag



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# File 'lib/nexml.rb', line 40

def tag_start name, attrs
  # puts "processing: #{name}"

  # These are more or less equivalent to tokens, 
  # they could likely be abstracted to a single
  # klass-like calls
    case name
    when "otus" # it's always a new object
      @obj.current_obj = @obj.new_otus(attrs)
      @obj.current_otus = @obj.current_obj 
    when "otu" # it's always in a otus block 
      @obj.current_obj =  @obj.new_otu(attrs)  
    when "characters"
      @obj.current_obj = @obj.new_characters(attrs)
      @obj.current_characters = @obj.current_obj 
    when "char" 
      @obj.current_obj =  @obj.new_char(attrs)  
    when "trees"  
      @obj.current_obj = @obj.new_trees(attrs)
      @obj.current_trees = @obj.current_obj 
    when "tree"
      @obj.current_obj = @obj.new_tree(attrs)  
      @obj.current_tree = @obj.current_obj 
    when "node"
      @obj.current_obj = @obj.new_node(attrs) 
    when "edge"  
      @obj.current_obj = @obj.new_edge(attrs) 
    else
      # necessary? 
    end 
end

#text(text) ⇒ Object

in between elements



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# File 'lib/nexml.rb', line 73

def text text
  t = text.strip
  # *** NOTE *** 
  # need to test to see that this doesn't have problems with embedded elements like so
  # <foo>alskfjaslkdfjlasfj <br/> </foo>
  @obj.current_obj.text = t if @obj.current_obj && t.size > 0 
end