Class: OData::AbstractQuery::Segments::CountSegment

Inherits:
OData::AbstractQuery::Segment show all
Defined in:
lib/o_data/abstract_query/segments/count_segment.rb

Instance Attribute Summary

Attributes inherited from OData::AbstractQuery::Segment

#query, #value

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from OData::AbstractQuery::Segment

#can_follow?, #inspect

Constructor Details

#initialize(query) ⇒ CountSegment

Returns a new instance of CountSegment.



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# File 'lib/o_data/abstract_query/segments/count_segment.rb', line 15

def initialize(query)
  super(query, self.class.segment_name)
end

Class Method Details

.can_follow?(anOtherSegment) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/o_data/abstract_query/segments/count_segment.rb', line 19

def self.can_follow?(anOtherSegment)
  if anOtherSegment.is_a?(Class)
    anOtherSegment == CollectionSegment || anOtherSegment == NavigationPropertySegment
  else
    (anOtherSegment.is_a?(CollectionSegment) || anOtherSegment.is_a?(NavigationPropertySegment)) && anOtherSegment.countable?
  end
end

.parse!(query, str) ⇒ Object 



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# File 'lib/o_data/abstract_query/segments/count_segment.rb', line 5

def self.parse!(query, str)
  return nil unless str.to_s == segment_name

  query.Segment(self)
end

.segment_name ⇒ Object 



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# File 'lib/o_data/abstract_query/segments/count_segment.rb', line 11

def self.segment_name
  "$count"
end

Instance Method Details

#execute!(acc) ⇒ Object 



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# File 'lib/o_data/abstract_query/segments/count_segment.rb', line 27

def execute!(acc)
  return acc.length if acc.respond_to?(:length)
  1
end

#valid?(results) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/o_data/abstract_query/segments/count_segment.rb', line 32

def valid?(results)
  results.is_a?(Fixnum)
end