io.ebean.XServiceProvider Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ebean Show documentation

composite of common runtime dependencies for all platforms

There is a newer version: 15.10.0

package io.ebean;

import io.ebean.service.SpiFetchGroupQuery;
import io.ebean.service.SpiFetchGroupService;
import io.ebean.service.SpiProfileLocationFactory;
import io.ebean.service.SpiRawSqlService;

import java.util.Iterator;
import java.util.ServiceLoader;

/**
 * Lookup internal services.
 */
class XServiceProvider {

  private static SpiRawSqlService rawSqlService = initRawSql();

  private static SpiProfileLocationFactory profileLocationFactory = initProfileLocation();

  private static SpiFetchGroupService fetchGroupService = initSpiFetchGroupService();

  private static SpiFetchGroupService initSpiFetchGroupService() {
    return loadFirstService(SpiFetchGroupService.class);
  }

  private static SpiRawSqlService initRawSql() {
    return loadFirstService(SpiRawSqlService.class);
  }

  private static SpiProfileLocationFactory initProfileLocation() {
    return loadFirstService(SpiProfileLocationFactory.class);
  }

  private static  T loadFirstService(Class cls) {
    Iterator loader = ServiceLoader.load(cls).iterator();
    if (loader.hasNext()) {
      return loader.next();
    }
    throw new IllegalStateException("No service implementation found for " + cls);
  }

  /**
   * Return the RawSqlService implementation.
   */
  static SpiRawSqlService rawSql() {
    return rawSqlService;
  }

  /**
   * Return the RawSqlService implementation.
   */
  static SpiProfileLocationFactory profileLocationFactory() {
    return profileLocationFactory;
  }

  /**
   * Return the FetchGroup with the given select clause.
   */
  static  FetchGroup fetchGroupOf(Class cls, String select) {
    return fetchGroupService.of(cls, select);
  }

  /**
   * Return the FetchGroupBuilder with the given select clause.
   */
  static  FetchGroupBuilder fetchGroupOf(Class cls) {
    return fetchGroupService.of(cls);
  }

  /**
   * Return the FetchGroup Query for building fetch groups via query beans.
   */
  static  SpiFetchGroupQuery fetchGroupQueryFor(Class cls) {
    return fetchGroupService.queryFor(cls);
  }
}