Class: OpenStudio::Metadata::Haystack

Inherits:
Object
  • Object
show all
Defined in:
lib/openstudio/metadata/serializer.rb

Overview

Class to serialize entities into a Haystack JSON

Examples:

Use Haystack to make JSON from list of entities

entities = creator.entities
haystack = Haystack.new
haystack_json = haystack.create_haystack_from_entities(entities)

Instance Method Summary collapse

Instance Method Details

#create_from_entities(entities) ⇒ String

Creates Haystack JSON from list of entities

Parameters:

Returns:

  • (String) —

    Haystack JSON representation of entities



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# File 'lib/openstudio/metadata/serializer.rb', line 108

def create_from_entities(entities)
  cols = []
  rows = []
  entities.each do |entity|
    entity.keys.each do |k|
      if k == 'add_tags'
        (tags = entity[k]) && tags.each { |tag| entity.store(tag, ':m') && entity.delete(k) }
      elsif k == 'type'
        (t_tags = entity[k].split('-')) && t_tags.each { |t_tag| entity.store(t_tag, ':m') } && entity.delete(k)
      elsif k == 'relationships'
        relationships = entity[k]
        relationships.each do |relationship, reference|
          entity.store(relationship, reference)
        end
        entity.delete(k)
      end
    end
    rows.append(entity)
  end
  rows.each do |row|
    row.keys.each do |k|
      unless cols.include?('name' => k)
        cols.append('name' => k)
      end
    end
  end
  data = { 'meta' => { 'ver' => '3.0' },
           'cols' => cols,
           'rows' => rows }
  return JSON.pretty_generate(data)
end