Class: HQMF1::Expression

Inherits:
Object
  • Object
show all
Includes:
Utilities
Defined in:
lib/hqmf-parser/1.0/expression.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Utilities

#attr_val, #check_nil_conjunction_on_child, #clean_json, #clean_json_recursive

Methods included from HQMF::Conversion::Utilities

#build_hash, #check_equality, #json_array, #openstruct_to_json

Constructor Details

#initialize(entry) ⇒ Expression

Returns a new instance of Expression.



9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/hqmf-parser/1.0/expression.rb', line 9

def initialize(entry)
  @entry = entry
  @text = @entry.xpath('./*/cda:derivationExpr').text.strip
  type = attr_val('./*/cda:value/@xsi:type')
  case type
  when 'IVL_PQ'
    @value = Range.new(@entry.xpath('./*/cda:value'))
  when 'PQ'
    @value = Value.new(@entry.xpath('./*/cda:value'))
  when 'ANYNonNull'
    @value = HQMF::AnyValue.new
  when nil
    @value = HQMF::AnyValue.new
  else
    raise "Unknown expression value type #{type}"
  end
  @type = match_type
end

Instance Attribute Details

#text ⇒ Object (readonly)

Returns the value of attribute text.



7
8
9
 
# File 'lib/hqmf-parser/1.0/expression.rb', line 7

def text
  @text
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



7
8
9
 
# File 'lib/hqmf-parser/1.0/expression.rb', line 7

def type
  @type
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



7
8
9
 
# File 'lib/hqmf-parser/1.0/expression.rb', line 7

def value
  @value
end

Instance Method Details

#match_type ⇒ Object 



28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
 
# File 'lib/hqmf-parser/1.0/expression.rb', line 28

def match_type
  case @text
    when /^COUNT(.*)$/
      "COUNT"
    when /^MIN(.*)$/
      "MIN"
    when /^MAX(.*)$/
      "MAX"
    when /^DATEDIFF(.*)$/
      "DATEDIFF"
    when /^TIMEDIFF(.*)$/
      "TIMEDIFF"
    when /^MEDIAN(.*)$/
      "MEDIAN"
    when /^AVG(.*)$/
      "MEAN"
    else
      raise "unknown expression type: #{@text}"
  end
end

#to_json ⇒ Object 



49
50
51
52
53
54
55
 
# File 'lib/hqmf-parser/1.0/expression.rb', line 49

def to_json
  
  json = build_hash(self, [:text,:type])
  json[:value] = self.value.to_json if self.value
  json
  
end