# GraphQL { #graphql }

As **FastAPI** is based on the **ASGI** standard, it's very easy to integrate any **GraphQL** library also compatible with ASGI.

You can combine normal FastAPI *path operations* with GraphQL on the same application.

/// tip

**GraphQL** solves some very specific use cases.

It has **advantages** and **disadvantages** when compared to common **web APIs**.

    /** The current page number (1-based). */
    protected int currentPageNumber;

    /** The total number of records in the search result set. */
    protected long allRecordCount;

    /** The relation type for the total record count (e.g., "eq", "gte"). */
    protected String allRecordCountRelation;

    /** The total number of pages based on the page size and total record count. */

     */
    @Resource
    protected HttpServletRequest request;

    /**
     * Returns an empty OptionalThing for login manager since API actions
     * use token-based authentication instead of traditional session-based login.
     *
     * @return empty OptionalThing indicating no login manager is used
     */
    @Override
    protected OptionalThing<LoginManager> myLoginManager() {

                .filter(i -> allPatterns.matcher(lines.get(i)).find())
                .boxed()
                .collect(Collectors.toList());

            URI baseUri = getRootDir().orElse(projectLayout.getProjectDirectory().getAsFile()).get().toURI();
            String path = baseUri.relativize(f.toURI()).toString();
            failures.addAll(
                invalidLines.stream()

  /** Returns the platform preferred implementation of a map based on a hash table. */
  static <K extends @Nullable Object, V extends @Nullable Object>
      Map<K, V> newHashMapWithExpectedSize(int expectedSize) {
    return CompactHashMap.createWithExpectedSize(expectedSize);
  }

  /**
   * Returns the platform preferred implementation of an insertion ordered map based on a hash
   * table.
   */

  /** Returns the platform preferred implementation of a map based on a hash table. */
  static <K extends @Nullable Object, V extends @Nullable Object>
      Map<K, V> newHashMapWithExpectedSize(int expectedSize) {
    return Maps.newHashMapWithExpectedSize(expectedSize);
  }

  /**
   * Returns the platform preferred implementation of an insertion ordered map based on a hash
   * table.
   */

* Based on Python type hints.
* Validation and documentation from these types.
* Dependency Injection system.

It doesn't use a data validation, serialization and documentation third-party library like Pydantic, it has its own. So, these data type definitions would not be reusable as easily.

            // Set event type based on message type
            WitnessEventType eventType = convertMessageTypeToEventType(message.getType());
            notification.setEventType(eventType);
            notification.setTimestamp(message.getTimestamp());

            // Set resource name based on message content
            if (message.getResourceName() != null) {

import org.codelibs.fess.util.ComponentUtil;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.TestInfo;

/**
 * Test class for Set-based field lookup improvements in QueryFieldConfig.
 * This class tests the performance and correctness of Set-based lookups
 * for search fields, facet fields, and sort fields.
 */
public class QueryFieldConfigSetBasedLookupTest extends UnitFessTestCase {

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