SystemRoleFactory.java
- /*
- * *************************************************************************************************************************************************************
- *
- * TheseFoolishThings: Miscellaneous utilities
- * http://tidalwave.it/projects/thesefoolishthings
- *
- * Copyright (C) 2009 - 2025 by Tidalwave s.a.s. (http://tidalwave.it)
- *
- * *************************************************************************************************************************************************************
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
- *
- * *************************************************************************************************************************************************************
- *
- * git clone https://bitbucket.org/tidalwave/thesefoolishthings-src
- * git clone https://github.com/tidalwave-it/thesefoolishthings-src
- *
- * *************************************************************************************************************************************************************
- */
- package it.tidalwave.role.spi;
- import javax.annotation.Nonnull;
- import java.util.List;
- import it.tidalwave.util.LazySupplier;
- import static it.tidalwave.role.impl.ServiceLoaderLocator.lazySupplierOf;
- /***************************************************************************************************************************************************************
- *
- * A service which retrieves DCI Roles for a given object.
- *
- * @author Fabrizio Giudici
- *
- **************************************************************************************************************************************************************/
- @FunctionalInterface
- public interface SystemRoleFactory
- {
- static class Inner
- {
- private static final LazySupplier<SystemRoleFactory> INSTANCE_REF =
- LazySupplier.of(() -> Inner.PROVIDER_REF.get().getSystemRoleFactory());
- private static final LazySupplier<SystemRoleFactoryProvider> PROVIDER_REF =
- lazySupplierOf(SystemRoleFactoryProvider.class);
- }
- /***********************************************************************************************************************************************************
- * Returns a singleton instance.
- *
- * @return the singleton instance
- **********************************************************************************************************************************************************/
- @Nonnull
- public static SystemRoleFactory getInstance()
- {
- return Inner.INSTANCE_REF.get();
- }
- /***********************************************************************************************************************************************************
- * Removes a previously installed {@link SystemRoleFactory}. <b>This method is for testing only (used to clean up a
- * testing context).</b>
- *
- * @see #set(SystemRoleFactory)
- **********************************************************************************************************************************************************/
- public static void reset()
- {
- Inner.PROVIDER_REF.clear();
- Inner.INSTANCE_REF.clear();
- }
- /***********************************************************************************************************************************************************
- * Installs a {@link SystemRoleFactory}. <b>This method is for testing only (used to set up a testing context).</b>
- *
- * @param systemRoleFactory the {@link SystemRoleFactory}
- * @see #reset()
- **********************************************************************************************************************************************************/
- public static void set (@Nonnull final SystemRoleFactory systemRoleFactory)
- {
- Inner.PROVIDER_REF.set(() -> systemRoleFactory);
- }
- /***********************************************************************************************************************************************************
- * Retrieves the roles of the given class for the given owner object.
- *
- * @param <T> the static type of the roles
- * @param owner the owner object
- * @param roleType the dynamic type of the roles
- * @return a list of roles
- **********************************************************************************************************************************************************/
- @Nonnull
- public <T> List<T> findRoles (@Nonnull Object owner, @Nonnull Class<? extends T> roleType);
- }