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Add AOT Repositories example.
Closes #695
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‎jpa/aot-generation/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.springframework.data.examples</groupId>
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<artifactId>spring-data-jpa-examples</artifactId>
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<version>2.0.0.BUILD-SNAPSHOT</version>
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</parent>
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<groupId>org.example</groupId>
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<artifactId>aot-generation</artifactId>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<hibernate.version>7.0.0.Beta5</hibernate.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.jspecify</groupId>
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<artifactId>jspecify</artifactId>
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<version>1.0.0</version>
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</dependency>
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<dependency>
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<groupId>com.querydsl</groupId>
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<artifactId>querydsl-jpa</artifactId>
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<version>5.1.0</version>
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<classifier>jakarta</classifier>
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</dependency>
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<dependency>
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<groupId>com.querydsl</groupId>
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<artifactId>querydsl-apt</artifactId>
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<version>5.1.0</version>
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<classifier>jakarta</classifier>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<configuration>
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<annotationProcessorPaths>
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<annotationProcessorPath>
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<groupId>com.querydsl</groupId>
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<artifactId>querydsl-jpa</artifactId>
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<version>5.1.0</version>
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<classifier>jakarta</classifier>
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</annotationProcessorPath>
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<annotationProcessorPath>
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<groupId>com.querydsl</groupId>
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<artifactId>querydsl-apt</artifactId>
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<version>5.1.0</version>
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<classifier>jakarta</classifier>
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</annotationProcessorPath>
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<annotationProcessorPath>
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<groupId>jakarta.persistence</groupId>
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<artifactId>jakarta.persistence-api</artifactId>
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<version>3.2.0</version>
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</annotationProcessorPath>
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</annotationProcessorPaths>
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<!-- Recommended: Some IDE's might require this configuration to include generated sources for IDE usage -->
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<generatedTestSourcesDirectory>target/generated-test-sources
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</generatedTestSourcesDirectory>
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<generatedSourcesDirectory>target/generated-sources
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</generatedSourcesDirectory>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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<executions>
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<execution>
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<id>process-aot</id>
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<goals>
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<goal>process-aot</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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</project>

‎jpa/aot-generation/src/main/java/example/springdata/aot/AotJpaApp.java

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/*
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* Copyright 2025 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package example.springdata.aot;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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/**
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* @author Christoph Strobl
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*/
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@SpringBootApplication
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public class AotJpaApp {
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public static void main(String[] args) {
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SpringApplication.run(AotJpaApp.class, args);
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}
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}

‎jpa/aot-generation/src/main/java/example/springdata/aot/CLR.java

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/*
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* Copyright 2025 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package example.springdata.aot;
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import java.util.List;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.CommandLineRunner;
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import org.springframework.data.domain.Page;
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import org.springframework.data.domain.PageRequest;
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import org.springframework.data.domain.Slice;
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import org.springframework.stereotype.Component;
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/**
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* @author Christoph Strobl
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* @since 2025/01
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*/
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@Component
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public class CLR implements CommandLineRunner {
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@Autowired UserRepository repository;
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@Override
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public void run(String... args) throws Exception {
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User luke = new User("id-1", "luke");
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luke.setFirstname("Luke");
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luke.setLastname("Skywalker");
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// Post lukeP1 = new Post("I have a bad feeling about this.");
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// em.persist(lukeP1);
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// luke.setPosts(List.of(lukeP1));
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User leia = new User("id-2", "leia");
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leia.setFirstname("Leia");
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leia.setLastname("Organa");
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User han = new User("id-3", "han");
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han.setFirstname("Han");
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han.setLastname("Solo");
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// Post hanP1 = new Post("It's the ship that made the Kessel Run in less than 12 Parsecs.");
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// em.persist(hanP1);
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// han.setPosts(List.of(hanP1));
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User chewbacca = new User("id-4", "chewbacca");
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User yoda = new User("id-5", "yoda");
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Post yodaP1 = new Post("Do. Or do not. There is no try.");
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Post yodaP2 = new Post("Decide you must, how to serve them best. If you leave now, help them you could; but you would destroy all for which they have fought, and suffered.");
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// em.persist(yodaP1);
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// em.persist(yodaP2);
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// yoda.setPosts(List.of(yodaP1, yodaP2));
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User vader = new User("id-6", "vader");
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vader.setFirstname("Anakin");
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vader.setLastname("Skywalker");
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// Post vaderP1 = new Post("I am your father");
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// em.persist(vaderP1);
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// vader.setPosts(List.of(vaderP1));
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User kylo = new User("id-7", "kylo");
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kylo.setFirstname("Ben");
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kylo.setLastname("Solo");
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repository.saveAll(List.of(luke, leia, han, chewbacca, yoda, vader, kylo));
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System.out.println("------- annotated multi -------");
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System.out.println(repository.usersWithUsernamesStartingWith("l"));
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System.out.println("------- derived single -------");
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System.out.println(repository.findUserByUsername("yoda"));
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// System.out.println("------- derived nested.path -------");
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// System.out.println(repository.findUserByPostsMessageLike("father"));
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System.out.println("------- derived optional -------");
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System.out.println(repository.findOptionalUserByUsername("yoda"));
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System.out.println("------- derived count -------");
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Long count = repository.countUsersByLastnameLike("Sky");
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System.out.println("user count " + count);
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System.out.println("------- derived exists -------");
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Boolean exists = repository.existsByUsername("vader");
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System.out.println("user exists " + exists);
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System.out.println("------- derived multi -------");
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System.out.println(repository.findUserByLastnameStartingWith("Sky"));
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System.out.println("------- derived sorted -------");
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System.out.println(repository.findUserByLastnameStartingWithOrderByFirstname("Sky"));
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System.out.println("------- derived page -------");
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Page<User> page0 = repository.findUserByLastnameStartingWith("S", PageRequest.of(0, 2));
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System.out.println("page0: " + page0);
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System.out.println("page0.content: " + page0.getContent());
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Page<User> page1 = repository.findUserByLastnameStartingWith("S", PageRequest.of(1, 2));
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System.out.println("page1: " + page1);
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System.out.println("page1.content: " + page1.getContent());
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System.out.println("------- derived slice -------");
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Slice<User> slice0 = repository.findUserByUsernameAfter("luke", PageRequest.of(0, 2));
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System.out.println("slice0: " + slice0);
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System.out.println("slice0.content: " + slice0.getContent());
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System.out.println("------- derived top -------");
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System.out.println(repository.findTop2UsersByLastnameStartingWith("S"));
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// System.out.println("------- derived with fields -------");
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// System.out.println(repository.findJustUsernameBy());
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}
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}

‎jpa/aot-generation/src/main/java/example/springdata/aot/Post.java

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/*
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* Copyright 2025 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package example.springdata.aot;
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import java.time.Instant;
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import java.time.temporal.ChronoUnit;
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import java.util.Random;
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import jakarta.persistence.Entity;
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import jakarta.persistence.GeneratedValue;
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import jakarta.persistence.Id;
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/**
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* @author Christoph Strobl
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* @since 2025/01
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*/
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@Entity
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public class Post {
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@Id
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@GeneratedValue
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private Long id;
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private String message;
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private Instant date;
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public Post() {
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}
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public Post(String message) {
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this.message = message;
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this.date = Instant.now().minus(new Random().nextLong(100), ChronoUnit.MINUTES);
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}
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public String getMessage() {
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return message;
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}
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public void setMessage(String message) {
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this.message = message;
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}
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public Instant getDate() {
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return date;
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}
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public void setDate(Instant date) {
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this.date = date;
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}
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@Override
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public String toString() {
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return message;
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}
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}

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