Module: Endeca::Transformer

Included in:
Document
Defined in:
lib/endeca/transformer.rb

Instance Method Summary collapse

Instance Method Details

#map(mapping = {}) ⇒ Object

Requires existence of mappings accessor (Hash)

Examples

# Standard map call that returns an Endeca::Map object
map(:old_name => :new_name)

# Allows to to create a map object to perform other functionality such
# as transformations.
map(:new_name)



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# File 'lib/endeca/transformer.rb', line 12

def map(mapping = {})
  mapping = {mapping => mapping} if Symbol === mapping
  mapping = mapping.symbolize_keys

  if mapping.length > 1
    raise ArgumentError, "map only accepts one key=>value pair" 
  end

  mapping.each do |key, transformed_key|
    transformed_key = key unless transformed_key
    return mappings[key] = Map.new(key, transformed_key)
  end
end

#transform_query_options(query_options) ⇒ Object

Use the mappings hash to replace domain level query query_options with their Endeca equivalent.



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# File 'lib/endeca/transformer.rb', line 28

def transform_query_options(query_options)
  query = query_options.symbolize_keys
  query.keys.each do |key|
    if mapping = mappings[key]
      new_options = mapping.perform(query)
      query.delete(key)
      query.update(new_options)
    end
  end
  query
end