ml-modules.root.data-hub.core.models.entities.mjs Maven / Gradle / Ivy

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Library for Creating an Operational Data Hub on MarkLogic

There is a newer version: 6.1.1

import {EntityModel} from "/data-hub/core/models/entityModel.mjs";

const sem = require("/MarkLogic/semantics");

const entityModelCollection = "http://marklogic.com/entity-services/models";
const entityModelsByIRI = {};

export function getEntityModel(entityModelIriOrTitle) {
  if (!entityModelsByIRI[entityModelIriOrTitle]) {
    const entityModelNode = getEntityModelDescriptor(entityModelIriOrTitle);
    if (entityModelNode) {
      entityModelsByIRI[entityModelIriOrTitle] = new EntityModel(entityModelNode.toObject());
    }
  }
  return entityModelsByIRI[entityModelIriOrTitle];
}

function getTitleAndParentIRI(iri) {
  const iriStr = fn.string(iri);
  const lastIndexOfSlash = iriStr.lastIndexOf("/");
  const parentIRI = iriStr.substring(0, lastIndexOfSlash - 1);
  const title = iriStr.substring(lastIndexOfSlash + 1);
  return {
    parentIRI,
    title
  };
}

function getEntityModelDescriptor(entityModelIriOrTitle) {
  return fn.head(cts.search(getEntityModelQuery(entityModelIriOrTitle), ["format-json", "score-zero", "unfiltered"], 0));
}

function getEntityModelQuery(entityModelIriOrTitle) {
  return cts.andQuery([
    cts.collectionQuery(entityModelCollection),
    cts.orQuery([
      cts.tripleRangeQuery(sem.iri(entityModelIriOrTitle), sem.iri('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'), [sem.iri('http://marklogic.com/entity-services#Model'), sem.iri('http://marklogic.com/entity-services#EntityType')], '='),
      cts.jsonPropertyScopeQuery(
        "info",
        cts.jsonPropertyValueQuery("title", entityModelIriOrTitle)
      )
    ])
  ]);
}

function getEntityInstanceQuery(entityTypeIRI) {
  const tripleRangeQuery = cts.tripleRangeQuery(null, sem.iri('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'), sem.iri(entityTypeIRI), '=');
  if (cts.exists(tripleRangeQuery)) {
    return tripleRangeQuery;
  }
  return cts.collectionQuery(getTitleAndParentIRI(entityTypeIRI).title);
}

export default {
  getEntityInstanceQuery,
  getEntityModel
};