Class: Pacer::YamlEncoder

Inherits:
Object
  • Object
show all
Defined in:
lib/pacer/graph/yaml_encoder.rb

Overview

This encoder was originally part of pacer-neo4j. It uses native data where Neo4j could and for everything else it uses (slow (but easy)) human-readable YAML encoding.

Class Method Summary collapse

Class Method Details

.decode_property(value) ⇒ Object 



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# File 'lib/pacer/graph/yaml_encoder.rb', line 65

def self.decode_property(value)
  if value.is_a? String and value[0, 1] == ' '
    marker = value[1, 4]
    if marker == 'utcT'
      # FIXME: we lose the milliseconds here...
      DateTime.parse(value[6..-1]).to_time.utc
    elsif marker == 'time'
      DateTime.parse(value[6..-1]).to_time
    elsif marker == 'date'
      Date.parse(value[6..-1])
    else
      YAML.load(value[1..-1])
    end
  elsif value.is_a? ArrayJavaProxy
    value.to_a
  else
    value
  end
rescue Psych::SyntaxError
  value
end

.encode_property(value) ⇒ Object 



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# File 'lib/pacer/graph/yaml_encoder.rb', line 8

def self.encode_property(value)
  case value
  when nil
    nil
  when String
    value = value.strip
    value = nil if value == ''
    value
  when Numeric
    if value.is_a? Bignum
      dump value
    else
      value.to_java
    end
  when true, false
    value.to_java
  when DateTime
    # rfc3339 drops the millisecond
    value.new_offset(0).strftime ' utcT %Y-%m-%d %H:%M:%S.%L'
  when Time
    if value.utc?
      value.getutc.strftime ' utcT %Y-%m-%d %H:%M:%S.%L'
    else
      value.strftime ' time %Y-%m-%d %H:%M:%S.%L %z'
    end
  when Date
    value.strftime ' date %Y-%m-%d'
  when Array
    if value.length == 0
      value_type = Fixnum
    else
      value_type = value.first.class
      value_type = TrueClass if value_type == FalseClass
      value.each do |v|
        if value_type != v.class or (value == true or value == false and value_type == TrueClass)
          value_type = nil
          break
        end
      end
    end
    case value_type
    when Fixnum
      value.to_java :long
    when Float
      value.to_java :double
    when TrueClass
      value.to_java :boolean
    when String
      value.to_java :string
    else
      dump value
    end
  else
    dump value
  end
end