Class: Embulk::Parser::Flexml

Inherits:
ParserPlugin
  • Object
show all
Defined in:
lib/embulk/parser/flexml.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.transaction(config) {|task, columns| ... } ⇒ Object

Yields:

  • (task, columns) 


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# File 'lib/embulk/parser/flexml.rb', line 10

def self.transaction(config, &control)
  schema = config.param("schema", :array)
  schema_serialized = schema.inject({}) do |memo, s|
    memo[s["name"]] = s
    if s["type"] == "timestamp"
      memo[s["name"]].merge!({
        "format" => s["format"],
        "timezone" => s["timezone"]
      })
    end
    memo
  end.to_h
  task = {
    :schema => schema_serialized,
    :root => config.param("root", :string)
  }
  columns = schema.each_with_index.map do |c, i|
    Column.new(i, c["name"], c["type"].to_sym)
  end
  yield(task, columns)
end

Instance Method Details

#convert(val, config) ⇒ Object 



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# File 'lib/embulk/parser/flexml.rb', line 67

def convert(val, config)
  v = val.nil? ? "" : val
  case config["type"]
  when "string"
    v
  when "long"
    v.to_i
  when "double"
    v.to_f
  when "boolean"
    ["yes", "true", "1"].include?(v.downcase)
  when "timestamp"
    unless v.empty?
      dest = Time.strptime(v, config["format"])
      return dest.utc if config["timezone"].nil?

      utc_offset = dest.utc_offset
      zone_offset = Time.zone_offset(config["timezone"])
      dest.localtime(zone_offset) + utc_offset - zone_offset
    else
      nil
    end
  else
    raise "Unsupported type '#{type}'"
  end
end

#run(file_input) ⇒ Object 



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# File 'lib/embulk/parser/flexml.rb', line 32

def run(file_input)
  while file = file_input.next_file
    begin
      xml_text = file.read
      doc = Document.new(xml_text)
      doc.elements.each(@task[:root]) do |e|
        values = @task[:schema].map do |f, c|
          row = if c.has_key?("xpath")
              XPath.first(e, c["xpath"])
            else
              e
            end

          unless row.nil?
            val = if c.has_key?("attribute")
              row.attributes[c["attribute"]]
            else
              row.text
            end
            convert(val, c)
          else
            nil
          end
        end

        @page_builder.add(values)
      end
    rescue Exception => e
      Embulk.logger.error "Failed to parse xml: #{e.message}"
    end
  end

  @page_builder.finish
end