Class: Lutaml::Qea::FileDetector

Inherits:
Object
  • Object
show all
Defined in:
lib/lutaml/qea/file_detector.rb

Overview

Utility for detecting and validating QEA files

Constant Summary collapse

SQLITE_MAGIC =

SQLite magic bytes

"SQLite format 3\x00"
REQUIRED_EA_TABLES =

Required EA tables for valid QEA file

%w[
  t_object
  t_attribute
  t_connector
  t_package
].freeze

Class Method Summary collapse

Class Method Details

.file_info(path) ⇒ Hash

Get file information

Examples:

info = FileDetector.file_info("model.qea")
puts "Size: #{info[:size_mb]} MB"
puts "Tables: #{info[:table_count]}"

Parameters:

  • path (String) —

    File path

Returns:

  • (Hash) —

    File information



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# File 'lib/lutaml/qea/file_detector.rb', line 110

def file_info(path) # rubocop:disable Metrics/AbcSize,Metrics/CyclomaticComplexity,Metrics/MethodLength,Metrics/PerceivedComplexity
  return { error: "File not found" } unless File.exist?(path)

  info = {
    path: path,
    size_bytes: File.size(path),
    size_mb: (File.size(path) / 1024.0 / 1024.0).round(2),
    modified: File.mtime(path),
    is_qea: qea_file?(path),
  }

  if sqlite_file?(path)
    begin
      db = SQLite3::Database.new(path, readonly: true)
      tables = get_table_names(db)
      info[:is_sqlite] = true
      info[:table_count] = tables.size
      info[:has_ea_tables] = REQUIRED_EA_TABLES.all? do |t|
        tables.include?(t)
      end

      # Get record counts for key tables
      if tables.include?("t_object")
        info[:object_count] =
          db.execute("SELECT COUNT(*) FROM t_object").first.first
      end
      if tables.include?("t_package")
        info[:package_count] =
          db.execute("SELECT COUNT(*) FROM t_package").first.first
      end
    rescue SQLite3::Exception => e
      info[:error] = e.message
    ensure
      db&.close
    end
  else
    info[:is_sqlite] = false
  end

  info
end

.qea_file?(path) ⇒ Boolean

Check if file is a QEA file

Parameters:

  • path (String) —

    File path

Returns:

  • (Boolean) —

    True if file appears to be QEA



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# File 'lib/lutaml/qea/file_detector.rb', line 25

def qea_file?(path)
  return false unless File.exist?(path)
  return false unless File.file?(path)
  return false unless path.end_with?(".qea")

  # Quick check: is it SQLite?
  sqlite_file?(path)
end

.validate_qea(path) ⇒ Hash

Validate QEA file structure

Examples:

result = FileDetector.validate_qea("model.qea")
if result[:valid]
  puts "Valid QEA file"
else
  puts "Errors: #{result[:errors]}"
end

Parameters:

  • path (String) —

    File path

Returns:

  • (Hash) —

    Validation result with :valid, :errors, :warnings



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# File 'lib/lutaml/qea/file_detector.rb', line 46

def validate_qea(path) # rubocop:disable Metrics/AbcSize,Metrics/CyclomaticComplexity,Metrics/MethodLength,Metrics/PerceivedComplexity
  errors = []
  warnings = []

  # Check file exists
  unless File.exist?(path)
    return {
      valid: false,
      errors: ["File not found: #{path}"],
      warnings: [],
    }
  end

  # Check file extension
  unless path.end_with?(".qea")
    warnings << "File does not have .qea extension"
  end

  # Check SQLite format
  unless sqlite_file?(path)
    errors << "File is not a valid SQLite database"
    return { valid: false, errors: errors, warnings: warnings }
  end

  # Check for EA tables
  begin
    db = SQLite3::Database.new(path, readonly: true)
    tables = get_table_names(db)

    REQUIRED_EA_TABLES.each do |required_table|
      unless tables.include?(required_table)
        errors << "Missing required EA table: #{required_table}"
      end
    end

    # Check for data
    if tables.include?("t_object")
      count = db.execute("SELECT COUNT(*) FROM t_object").first.first
      if count.zero?
        warnings << "No objects found in t_object table"
      end
    end
  rescue SQLite3::Exception => e
    errors << "Failed to open database: #{e.message}"
  ensure
    db&.close
  end

  {
    valid: errors.empty?,
    errors: errors,
    warnings: warnings,
  }
end