Class: GwtRpc::Response::Reader

Inherits:
Object
  • Object
show all
Defined in:
lib/gwt_rpc/response/reader.rb

Constant Summary collapse

DEBUG = 
false

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(client, json_body) ⇒ Reader

Returns a new instance of Reader.



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# File 'lib/gwt_rpc/response/reader.rb', line 5

def initialize(client, json_body)
  @client = client
  true_json = demangle_json_body(json_body)
  (@version, placeholder, @string_table, *@data) = JSON.parse(true_json).reverse
  @max_prior_string_location = 0
  @objects = []
end

Instance Attribute Details

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/gwt_rpc/response/reader.rb', line 4

def data
  @data
end

#objects ⇒ Object (readonly)

Returns the value of attribute objects.



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# File 'lib/gwt_rpc/response/reader.rb', line 4

def objects
  @objects
end

#string_table ⇒ Object (readonly)

Returns the value of attribute string_table.



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# File 'lib/gwt_rpc/response/reader.rb', line 4

def string_table
  @string_table
end

#version ⇒ Object (readonly)

Returns the value of attribute version.



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# File 'lib/gwt_rpc/response/reader.rb', line 4

def version
  @version
end

Instance Method Details

#debug ⇒ Object 



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# File 'lib/gwt_rpc/response/reader.rb', line 69

def debug
  html = "<table>\n"
  html << @data.map{|i| [i, @string_table[i-1]].map{|val| "<td>#{val}</td>"}}.map{|row| "<tr>#{row}</tr>"}.join("\n")
  html << "</table><table>\n"
  @string_table.each_with_index{|str,i| html << "<tr><td>#{i+1}</td><td>#{str}</td></tr>\n"}
  html << "</table>"
  
  html
end

#demangle_json_body(faux_json) ⇒ Object 



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# File 'lib/gwt_rpc/response/reader.rb', line 79

def demangle_json_body(faux_json)
  if faux_json.match(/^\[(.+),\[(.+)\],0,7\]$/)
    data = $1
    string_table = $2
    data.gsub!(/'/,'"')

    "[#{data},[#{string_table}],0,7]"
  else
    raise "can't demangle"
  end
end

#read_int ⇒ Object 



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# File 'lib/gwt_rpc/response/reader.rb', line 13

def read_int
  int = @data.shift
  puts "read int #{int}" if DEBUG
  int
end

#read_object ⇒ Object 



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# File 'lib/gwt_rpc/response/reader.rb', line 34

def read_object
  int = read_int
  
  if int < 0
    puts "reading obj reference (#{int})" if DEBUG
    obj = @objects[-1 - int]
    # if int == -11
    #   puts obj.inspect
    #   @objects.each_with_index do |doc, i|
    #     puts "#{i} => #{doc.inspect}"
    #   end
    #   exit
    # end
  elsif int > 0
    java_class = read_string(int)
    java_class.sub!(/\/\d+$/,'')
    puts "reading obj #{java_class}" if DEBUG
    ruby_class = @client.class.java_class_to_ruby(java_class)
    
    if ruby_class
      placeholder_position = @objects.count
      @objects << "PLACEHOLDER of type #{java_class}"
      
      obj = ruby_class.constantize.gwt_deserialize(self)
      @objects[placeholder_position] = obj
    else
      raise "unknown java class '#{java_class}'"
    end
  elsif int == 0
    puts "reading obj nil (0)" if DEBUG
    obj = nil
  end
  obj
end

#read_string(position = read_int) ⇒ Object 



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# File 'lib/gwt_rpc/response/reader.rb', line 19

def read_string(position=read_int)
  if position > (@max_prior_string_location + 1)
    raise "trying to read #{position}, which is too far ahead; max seen thus far is #{@max_prior_string_location}!"
  end
  
  if position > @max_prior_string_location
    @max_prior_string_location += 1
  end
  
  val = @string_table[position-1]
  puts "read str #{val} (@#{position})" if DEBUG
  
  val
end