Class: RDF::Tabular::Column

Inherits:
Metadata show all
Defined in:
lib/rdf/tabular/metadata.rb

Constant Summary collapse

PROPERTIES = 
{
  :@id         => :link,
  :@type       => :atomic,
  name:           :atomic,
  suppressOutput: :atomic,
  titles:         :natural_language,
  virtual:        :atomic,
}.freeze
DEFAULTS = 
{
  suppressOutput:      false,
  virtual:             false,
}.freeze
REQUIRED = 
[].freeze

Constants inherited from Metadata

Metadata::DATATYPES, Metadata::INHERITED_DEFAULTS, Metadata::INHERITED_PROPERTIES, Metadata::LOCAL_CONTEXT, Metadata::NAME_SYNTAX

Instance Attribute Summary

Attributes inherited from Metadata

#filenames, #object, #parent, #url

Instance Method Summary collapse

Methods inherited from Metadata

#==, #[], #[]=, #base, #common_properties, #context, #datatype=, #describes_file?, #dialect, #dialect=, #each, #each_row, for_input, #initialize, #inspect, new, #normalize!, #normalize_jsonld, open, site_wide_config, #tableSchema=, #tables=, #to_json, #transformations=, #type, #valid?, #valid_natural_language_property?, #validate, #validate!, #verify_compatible!

Constructor Details

This class inherits a constructor from RDF::Tabular::Metadata

Instance Method Details

#has_annotations? ⇒ Boolean

Does the Metadata or any descendant have any common properties

Returns:

  • (Boolean) 


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# File 'lib/rdf/tabular/metadata.rb', line 1602

def has_annotations?
  super || columns.any? {|c| c.has_annotations? }
end

#id ⇒ RDF::URI

Identifier for this Column, as an RFC7111 fragment

Returns:

  • (RDF::URI) 


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# File 'lib/rdf/tabular/metadata.rb', line 1638

def id;
  url = table ? table.url : RDF::URI("")
  url.to_s + "#col=#{self.sourceNumber}";
end

#name ⇒ Object

Return or create a name for the column from titles, if it exists



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# File 'lib/rdf/tabular/metadata.rb', line 1627

def name
  self[:name] || if titles && (ts = titles[context.default_language || 'und'] || titles[self.lang || 'und'])
    n = Array(ts).first
    n0 = RDF::URI.encode(n[0,1], /[^a-zA-Z0-9]/).encode("utf-8")
    n1 = RDF::URI.encode(n[1..-1], /[^\w\.]/).encode("utf-8")
    "#{n0}#{n1}"
  end || "_col.#{number}"
end

#number ⇒ Integer

Column number set on initialization

Returns:

  • (Integer) —

    1-based colnum number



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# File 'lib/rdf/tabular/metadata.rb', line 1587

def number
  @options.fetch(:number, 0)
end

#sourceNumber ⇒ Integer

Note:

this is lazy evaluated to avoid dependencies on setting dialect vs. initializing columns

Source Column number set on initialization

Returns:

  • (Integer) —

    1-based colnum number



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# File 'lib/rdf/tabular/metadata.rb', line 1595

def sourceNumber
  skipColumns = table ? dialect.skipColumns.to_i : 0
  number + skipColumns
end

#table ⇒ Table

Table containing this column (if any)

Returns:



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# File 'lib/rdf/tabular/metadata.rb', line 1583

def table; @options[:table]; end

#to_atd ⇒ Object

Return Annotated Column representation



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# File 'lib/rdf/tabular/metadata.rb', line 1644

def to_atd
  object.inject({
    "@id" => id.to_s,
    "@type" => "Column",
    "table" => (table.id.to_s if table.id),
    "number" => self.number,
    "sourceNumber" => self.sourceNumber,
    "virtual" => self.virtual,
    "name" => self.name,
    "titles" => self.titles
  }) do |memo, (k, v)|
    memo[k.to_s] ||= v
    memo
  end.delete_if {|k,v| v.nil?}
end