Class: DecisionAgent::Dmn::DecisionGraphParser

Inherits:

Object

• Object
• DecisionAgent::Dmn::DecisionGraphParser

Defined in:

lib/decision_agent/dmn/decision_graph.rb

Overview

Parser for DMN decision graphs from XML

Class Method Summary

• .parse(xml_doc) ⇒ Object
• .parse_decision_node(decision_xml) ⇒ Object
• .parse_decision_table(table_xml) ⇒ Object

Class Method Details

.parse(xml_doc) ⇒ Object

# File 'lib/decision_agent/dmn/decision_graph.rb', line 262

def self.parse(xml_doc)
  # Extract namespace and model info
  definitions = xml_doc.at_xpath("//dmn:definitions") || xml_doc.root
  model_id = definitions["id"] || "decision_graph"
  model_name = definitions["name"] || model_id

  graph = DecisionGraph.new(id: model_id, name: model_name)

  # Parse all decisions
  decisions = xml_doc.xpath("//dmn:decision")
  decisions.each do |decision_xml|
    decision_node = parse_decision_node(decision_xml)
    graph.add_decision(decision_node)

    # Parse information requirements (dependencies)
    decision_id = decision_xml["id"]
    decision_node = graph.get_decision(decision_id)

    # Find all information requirements
    decision_xml.xpath(".//dmn:informationRequirement").each do |req|
      required_decision = req.at_xpath(".//dmn:requiredDecision")
      next unless required_decision

      required_id = required_decision["href"]&.sub("#", "")
      decision_node.add_dependency(required_id) if required_id
    end
  end

  graph
end

.parse_decision_node(decision_xml) ⇒ Object

# File 'lib/decision_agent/dmn/decision_graph.rb', line 293

def self.parse_decision_node(decision_xml)
  decision_id = decision_xml["id"]
  decision_name = decision_xml["name"] || decision_id

  # Check for decision table
  decision_table = decision_xml.at_xpath(".//dmn:decisionTable")
  if decision_table
    # Parse decision table (simplified)
    decision_logic = parse_decision_table(decision_table)
  else
    # Check for literal expression (could be decision tree or simple expression)
    literal_expr = decision_xml.at_xpath(".//dmn:literalExpression")
    decision_logic = literal_expr&.text&.strip
  end

  DecisionNode.new(
    id: decision_id,
    name: decision_name,
    decision_logic: decision_logic
  )
end

.parse_decision_table(table_xml) ⇒ Object

# File 'lib/decision_agent/dmn/decision_graph.rb', line 315

def self.parse_decision_table(table_xml)
  # Simplified decision table parsing
  # Full implementation would use the existing DecisionTable parser
  {
    type: "decision_table",
    hit_policy: table_xml["hitPolicy"] || "UNIQUE",
    inputs: [],
    rules: []
  }
end