Class: HQMF1::Restriction

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

Overview

Represents a restriction on the allowable values of a data item

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Utilities

#attr_val, #clean_json, #clean_json_recursive

Methods included from HQMF::Conversion::Utilities

#build_hash, #check_equality, #json_array, #openstruct_to_json

Constructor Details

#initialize(entry, parent, doc) ⇒ Restriction

Returns a new instance of Restriction.



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 10

def initialize(entry, parent, doc)
  @doc = doc
  @entry = entry
  @restrictions = []
  
  range_def = @entry.at_xpath('./cda:pauseQuantity')
  if range_def
    @range = Range.new(range_def)
  end
  
  local_restrictions = @entry.xpath('./*/cda:sourceOf[@typeCode!="PRCN" and @typeCode!="COMP"]').collect do |entry|
    Restriction.new(entry, self, @doc)
  end
  
  @restrictions.concat(local_restrictions)
  
  local_subset = attr_val('./cda:subsetCode/@code')
  if local_subset
    @subset = local_subset
  end
  
  if @entry.at_xpath('./*/cda:derivationExpr')
    @expression = Expression.new(@entry) 
  end
  
  comparison_def = @entry.at_xpath('./*/cda:sourceOf[@typeCode="COMP"]')
  if comparison_def
    data_criteria_id = attr_val('./*/cda:id/@root')
    data_criteria_id = comparison_def.at_xpath('./*/cda:id/@root').value if (data_criteria_id.nil? and comparison_def.at_xpath('./*/cda:id/@root'))
    @comparison = Comparison.new(data_criteria_id, comparison_def, self, @doc)
  end
  
  @preconditions = @entry.xpath('./*/cda:sourceOf[@typeCode="PRCN"]').collect do |entry|
    # create a dummy parent with a single restriction copied from self minus the
    # nested preconditions to avoid an infinite loop
    prior_comparison = nil
    if parent.class==HQMF1::Precondition
      prior_comparison = parent.first_comparison
    else
      prior_comparison = @comparsion
    end
    current_restriction = OpenStruct.new(
      'range' => @range,
      'comparison' => prior_comparison,
      'restrictions' => [],
      'preconditions' => [],
      'subset' => @subset,
      'type' => type,
      'target_id' => target_id,
      'field' => field,
      'field_code' => field_code,
      'field_time' => field_time,
      'value' => value)
    all_restrictions = []
    all_restrictions.concat @restrictions
    all_restrictions << current_restriction
    parent = OpenStruct.new(
      'restrictions' => all_restrictions,
      'subset' => @subset
    )
    p = Precondition.new(entry, parent, @doc)
    
  end
  
end

Instance Attribute Details

#comparison ⇒ Object (readonly)

Returns the value of attribute comparison.



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 7

def comparison
  @comparison
end

#expression ⇒ Object (readonly)

Returns the value of attribute expression.



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 7

def expression
  @expression
end

#from_parent ⇒ Object

Returns the value of attribute from_parent.



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 8

def from_parent
  @from_parent
end

#preconditions ⇒ Object (readonly)

Returns the value of attribute preconditions.



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 7

def preconditions
  @preconditions
end

#range ⇒ Object (readonly)

Returns the value of attribute range.



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 7

def range
  @range
end

#restrictions ⇒ Object (readonly)

Returns the value of attribute restrictions.



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 7

def restrictions
  @restrictions
end

#subset ⇒ Object (readonly)

Returns the value of attribute subset.



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 7

def subset
  @subset
end

Instance Method Details

#field ⇒ Object 



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 92

def field
  attr_val('./cda:observation/cda:code/@displayName')
end

#field_code ⇒ Object 



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 96

def field_code
  attr_val('./cda:observation/cda:code/@code') || attr_val('./cda:encounter/cda:participant/cda:roleParticipant/@classCode')
end

#field_time ⇒ Object 



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 100

def field_time
  effectiveTime = @entry.at_xpath('./cda:observation/cda:effectiveTime') || @entry.at_xpath('./cda:encounter/cda:participant/cda:roleParticipant/cda:effectiveTime')
  
  time = nil
  if effectiveTime
    time = :start if effectiveTime.at_xpath('./cda:low')
    time = :end if effectiveTime.at_xpath('./cda:high')
  end
  time
end

#negation ⇒ Object

is this type negated? true or false



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 82

def negation
  attr_val('./@inversionInd') == "true"
end

#target_id ⇒ Object

The id of the data criteria or measurement property that the value will be compared against



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 88

def target_id
  attr_val('./*/cda:id/@root')
end

#to_json ⇒ Object 



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 141

def to_json 
  return nil if from_parent
  json = build_hash(self, [:subset,:type,:target_id,:field,:field_code,:from_parent, :negation, :field_time])
  json[:range] = range.to_json if range
  if value
    if value.is_a? String
      json[:value] = value
    else
      json[:value] = value.to_json
    end
  end
  json[:comparison] = comparison.to_json if comparison
  json[:restrictions] = json_array(self.restrictions)
  json[:preconditions] = json_array(self.preconditions)
  json[:expression] = self.expression.to_json if self.expression
  json
end

#type ⇒ Object

The type of restriction, e.g. SBS, SBE etc



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 77

def type
  attr_val('./@typeCode')
end

#value ⇒ Object 



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# File 'lib/hqmf-parser/1.0/restriction.rb', line 112

def value
  value = nil
  type = attr_val('./cda:observation/cda:value/@xsi:type') || 'CD'
  case type
  when 'IVL_PQ'
    value = HQMF1::Range.new(@entry.xpath('./cda:observation/cda:value'))
  when 'PQ'
    value = HQMF1::Value.new(@entry.xpath('./cda:observation/cda:value'))
  when 'CD'
    if field && field.downcase == 'status'
      code = attr_val('./cda:observation/cda:value/@displayName').downcase
      value = HQMF::Coded.for_single_code('status',code,code)
    elsif attr_val('./cda:observation/cda:value/@code')
      oid = attr_val('./cda:observation/cda:value/@code')
      title = attr_val('./cda:observation/cda:value/@displayName')
      value = HQMF::Coded.for_code_list(oid,title)
    elsif attr_val('./cda:encounter/cda:participant/cda:roleParticipant/cda:code/@code')
      oid = attr_val('./cda:encounter/cda:participant/cda:roleParticipant/cda:code/@code')
      title = attr_val('./cda:encounter/cda:participant/cda:roleParticipant/cda:code/@displayName')
      value = HQMF::Coded.for_code_list(oid,title)
    end
  when 'ANYNonNull'
    value = HQMF::AnyValue.new
  else
    raise "Unknown restriction value type #{type}"
  end if type
  value
end