Java tutorial
/* * Copyright 2015 the original author or authors. * * 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. */ package example.springdata.rest.uris; import lombok.NonNull; import lombok.RequiredArgsConstructor; import java.io.Serializable; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.rest.core.support.EntityLookup; import org.springframework.data.rest.core.support.EntityLookupSupport; /** * Custom {@link EntityLookup} to replace the usage of the database identifier in item resource URIs with the username * property of the {@link User}. This one is not really used out of the box as it's not a Spring bean. It's just a * sample of how to deploy a customization in non-Java 8 environments which can't use the fluent API in use in * {@link SpringDataRestCustomization}. * * @author Oliver Gierke * @see SpringDataRestCustomization#configureRepositoryRestConfiguration(org.springframework.data.rest.core.config.RepositoryRestConfiguration) */ @RequiredArgsConstructor(onConstructor = @__(@Autowired)) public class UserEntityLookup extends EntityLookupSupport<User> { private final @NonNull UserRepository repository; /* * (non-Javadoc) * @see org.springframework.data.rest.core.support.EntityLookup#getId(java.lang.Object) */ @Override public Serializable getResourceIdentifier(User entity) { return entity.getUsername(); } /* * (non-Javadoc) * @see org.springframework.data.rest.core.support.EntityLookup#lookupEntity(java.io.Serializable) */ @Override public Object lookupEntity(Serializable id) { return repository.findByUsername(id.toString()); } }