dmn-js-drd/lib/import/Importer.js

A decision requirements diagram view for dmn-js

import DrdTreeWalker from './DrdTreeWalker';

/**
 * Import the definitions into a diagram.
 *
 * Errors and warnings are reported through the specified callback.
 *
 * @param  {Drd} drd
 * @param  {ModdleElement} definitions
 * @param  {Function} done
 *         the callback, invoked with (err, [ warning ]) once the import is done
 */
export function importDRD(drd, definitions, done) {
  var importer = drd.get('drdImporter'),
    eventBus = drd.get('eventBus');
  var error,
    warnings = [];
  function render(definitions) {
    var visitor = {
      root: function (element) {
        return importer.root(element);
      },
      element: function (element, di) {
        return importer.add(element, di);
      },
      error: function (message, context) {
        warnings.push({
          message: message,
          context: context
        });
      }
    };
    var walker = new DrdTreeWalker(visitor);

    // import
    walker.handleDefinitions(definitions);
  }
  eventBus.fire('import.start', {
    definitions: definitions
  });
  try {
    render(definitions);
  } catch (e) {
    error = e;
  }
  eventBus.fire('import.done', {
    error: error,
    warnings: warnings
  });
  done(error, warnings);
}
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