Class: PgGraph::Data::Dimension

Inherits:
Object
  • Object
show all
Defined in:
lib/pg_graph/data/dimension.rb

Overview

Dimension of the node (corresponding kind shown in parenthesis):

0   A single value (:value)
1   A single record (:record)
2   A map from id to record (:table)
3   A map from id to array of duplicate records (:table)

The dimension defines class and structures of GraphData objects

Class Method Summary collapse

Class Method Details

.field_class(dimension) ⇒ Object 



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# File 'lib/pg_graph/data/dimension.rb', line 24

def self.field_class(dimension)
  validate(dimension)
  case dimension
    when 0; Column
    when 1; RecordField
    when 2; TableField
    when 3; MmTableField
  end
end

.kind(dimension) ⇒ Object 



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# File 'lib/pg_graph/data/dimension.rb', line 16

def self.kind(dimension)
  case dimension
    when 0; :value
    when 1; :record
    when 2, 3; :table
  end
end

.valid?(dimension, min: 0) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pg_graph/data/dimension.rb', line 12

def self.valid?(dimension, min: 0)
  dimension.is_a?(Integer) && (min..3).include?(dimension) 
end

.validate(dim, min: 0, unwind: 1) ⇒ Object 



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# File 'lib/pg_graph/data/dimension.rb', line 43

def self.validate(dim, min: 0, unwind: 1)
  constrain dim, Integer, unwind: unwind
  constrain dim, 
      lambda { |d| Dimension.valid?(d, min: min) }, 
      "Out of range value: #{dim}", 
      unwind: unwind
end

.value_class(dimension) ⇒ Object 



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# File 'lib/pg_graph/data/dimension.rb', line 34

def self.value_class(dimension)
  validate(dimension, min: 1)
  case dimension
    when 1; RecordValue
    when 2; TableValue
    when 3; MmTableValue
  end
end