Class: GeoRuby::SimpleFeatures::HexEWKBParser

Inherits:
EWKBParser
  • Object
show all
Defined in:
lib/geo_ruby/simple_features/ewkb_parser.rb,
lib/geo_ruby/simple_features/ewkb_parser.rb

Overview

Parses HexEWKB strings. In reality, it just transforms the HexEWKB string into the equivalent EWKB string and lets the EWKBParser do the actual parsing.

Instance Method Summary collapse

Constructor Details

#initialize(factory) ⇒ HexEWKBParser

Returns a new instance of HexEWKBParser.



150
151
152
 
# File 'lib/geo_ruby/simple_features/ewkb_parser.rb', line 150

def initialize(factory)
  super(factory)
end

Instance Method Details

#decode_hex(hexewkb) ⇒ Object

transforms a HexEWKB string into an EWKB string



158
159
160
161
162
163
164
165
 
# File 'lib/geo_ruby/simple_features/ewkb_parser.rb', line 158

def decode_hex(hexewkb)
  result=""
  num_bytes = (hexewkb.size + 1) / 2
  0.upto(num_bytes-1) do |i|
    result << hexewkb[i*2,2].hex
  end
  result
end

#parse(hexewkb) ⇒ Object

parses an HexEWKB string



154
155
156
 
# File 'lib/geo_ruby/simple_features/ewkb_parser.rb', line 154

def parse(hexewkb)
  super(decode_hex(hexewkb))
end