[BAEL-1575] Advanced tagging implementation with JPA

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/dao/ManyStudentRepository.java

@@ -0,0 +1,10 @@
+package org.baeldung.inmemory.persistence.dao;
+
+import org.baeldung.inmemory.persistence.model.ManyStudent;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.List;
+
+public interface ManyStudentRepository extends JpaRepository<ManyStudent, Long> {
+    List<ManyStudent> findByManyTags_Name(String name);
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/dao/ManyTagRepository.java

@@ -0,0 +1,7 @@
+package org.baeldung.inmemory.persistence.dao;
+
+import org.baeldung.inmemory.persistence.model.ManyTag;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface ManyTagRepository extends JpaRepository<ManyTag, Long> {
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/dao/StudentRepository.java

@@ -15,4 +15,10 @@ public interface StudentRepository extends JpaRepository<Student, Long> {
     @Query("SELECT s FROM Student s JOIN s.tags t WHERE s.name = LOWER(:name) AND t = LOWER(:tag)")
     List<Student> retrieveByNameFilterByTag(@Param("name") String name, @Param("tag") String tag);
 
+    @Query("SELECT s FROM Student s JOIN s.skillTags t WHERE t.name = LOWER(:tagName) AND t.value > :tagValue")
+    List<Student> retrieveByNameFilterByMinimumSkillTag(@Param("tagName") String tagName, @Param("tagValue") int tagValue);
+
+    @Query("SELECT s FROM Student s JOIN s.kvTags t WHERE t.key = LOWER(:key)")
+    List<Student> retrieveByKeyTag(@Param("key") String key);
+
 }

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/model/KVTag.java

@@ -0,0 +1,33 @@
+package org.baeldung.inmemory.persistence.model;
+
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class KVTag {
+    private String key;
+    private String value;
+
+    public KVTag(){}
+
+    public KVTag(String key, String value) {
+        super();
+        this.key = key;
+        this.value = value;
+    }
+
+    public String getKey() {
+        return key;
+    }
+
+    public void setKey(String key) {
+        this.key = key;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/model/LocationTag.java

@@ -0,0 +1,39 @@
+package org.baeldung.inmemory.persistence.model;
+
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class LocationTag {
+    private String name;
+    private int xPos;
+    private int yPos;
+
+    public LocationTag(){}
+
+    public LocationTag(String name, int xPos, int yPos) {
+        super();
+        this.name = name;
+        this.xPos = xPos;
+        this.yPos = yPos;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getxPos() {
+        return xPos;
+    }
+
+    public void setxPos(int xPos) {
+        this.xPos = xPos;
+    }
+
+    public int getyPos() {
+        return yPos;
+    }
+
+    public void setyPos(int yPos) {
+        this.yPos = yPos;
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/model/ManyStudent.java

@@ -0,0 +1,34 @@
+package org.baeldung.inmemory.persistence.model;
+
+import javax.persistence.*;
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+public class ManyStudent {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private int id;
+    private String name;
+
+    @ManyToMany(cascade = CascadeType.ALL)
+    @JoinTable(name = "manystudent_manytags",
+            joinColumns = @JoinColumn(name = "manystudent_id", referencedColumnName = "id"),
+            inverseJoinColumns = @JoinColumn(name = "manytag_id", referencedColumnName = "id"))
+    private Set<ManyTag> manyTags = new HashSet<>();
+
+    public ManyStudent() {}
+
+    public ManyStudent(String name) {
+        this.name = name;
+    }
+
+    public Set<ManyTag> getManyTags() {
+        return manyTags;
+    }
+
+    public void setManyTags(Set<ManyTag> manyTags) {
+        this.manyTags.addAll(manyTags);
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/model/ManyTag.java

@@ -0,0 +1,39 @@
+package org.baeldung.inmemory.persistence.model;
+
+import javax.persistence.*;
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+public class ManyTag {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private int id;
+    private String name;
+
+    @ManyToMany(mappedBy = "manyTags")
+    private Set<ManyStudent> students = new HashSet<>();
+
+    public ManyTag() {}
+
+    public ManyTag(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Set<ManyStudent> getStudents() {
+        return students;
+    }
+
+    public void setStudents(Set<ManyStudent> students) {
+        this.students.addAll(students);
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/model/SkillTag.java

@@ -0,0 +1,29 @@
+package org.baeldung.inmemory.persistence.model;
+
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class SkillTag {
+    private String name;
+    private int value;
+
+    public SkillTag(){}
+
+    public SkillTag(String name, int value) {
+        super();
+        this.name = name;
+        this.value = value;
+    }
+
+    public int getValue() {
+        return value;
+    }
+
+    public void setValue(int value) {
+        this.value = value;
+    }
+
+    public String getName() {
+        return name;
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/model/Student.java

@@ -1,10 +1,10 @@
 package org.baeldung.inmemory.persistence.model;
 
+import java.util.ArrayList;
+import java.util.List;
 import javax.persistence.ElementCollection;
 import javax.persistence.Entity;
 import javax.persistence.Id;
-import java.util.ArrayList;
-import java.util.List;
 
 @Entity
 public class Student {
@@ -16,6 +16,12 @@ public class Student {
     @ElementCollection
     private List<String> tags = new ArrayList<>();
 
+    @ElementCollection
+    private List<SkillTag> skillTags = new ArrayList<>();
+
+    @ElementCollection
+    private List<KVTag> kvTags = new ArrayList<>();
+
     public Student() {
     }
 
@@ -48,4 +54,21 @@ public List<String> getTags() {
     public void setTags(List<String> tags) {
         this.tags.addAll(tags);
     }
+
+    public List<SkillTag> getSkillTags() {
+        return skillTags;
+    }
+
+    public void setSkillTags(List<SkillTag> skillTags) {
+        this.skillTags.addAll(skillTags);
+    }
+
+    public List<KVTag> getKVTags() {
+        return this.kvTags;
+    }
+
+    public void setKVTags(List<KVTag> kvTags) {
+        this.kvTags.addAll(kvTags);
+    }
+
 }

persistence-modules/spring-jpa/src/test/java/org/baeldung/persistence/repository/AdvancedTaggingIntegrationTest.java

@@ -0,0 +1,81 @@
+package org.baeldung.persistence.repository;
+
+import org.baeldung.config.StudentJpaConfig;
+import org.baeldung.inmemory.persistence.dao.ManyStudentRepository;
+import org.baeldung.inmemory.persistence.dao.ManyTagRepository;
+import org.baeldung.inmemory.persistence.dao.StudentRepository;
+import org.baeldung.inmemory.persistence.model.KVTag;
+import org.baeldung.inmemory.persistence.model.ManyStudent;
+import org.baeldung.inmemory.persistence.model.ManyTag;
+import org.baeldung.inmemory.persistence.model.SkillTag;
+import org.baeldung.inmemory.persistence.model.Student;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+import org.springframework.transaction.annotation.Transactional;
+
+import javax.annotation.Resource;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { StudentJpaConfig.class }, loader = AnnotationConfigContextLoader.class)
+@Transactional
+public class AdvancedTaggingIntegrationTest {
+    @Resource
+    private StudentRepository studentRepository;
+
+    @Resource
+    private ManyStudentRepository manyStudentRepository;
+
+    @Resource
+    private ManyTagRepository manyTagRepository;
+
+    @Test
+    public void givenStudentWithSkillTags_whenSave_thenGetByNameAndSkillTag() {
+        Student student = new Student(1, "Will");
+        SkillTag skill1 = new SkillTag("java", 5);
+        student.setSkillTags(Arrays.asList(skill1));
+        studentRepository.save(student);
+
+        Student student2 = new Student(2, "Joe");
+        SkillTag skill2 = new SkillTag("java", 1);
+        student2.setSkillTags(Arrays.asList(skill2));
+        studentRepository.save(student2);
+
+        List<Student> students = studentRepository.retrieveByNameFilterByMinimumSkillTag("java", 3);
+        assertEquals("size incorrect", 1, students.size());
+    }
+
+    @Test
+    public void givenStudentWithKVTags_whenSave_thenGetByTagOk(){
+        Student student = new Student(0, "John");
+        student.setKVTags(Arrays.asList(new KVTag("department", "computer science")));
+        studentRepository.save(student);
+
+        Student student2 = new Student(1, "James");
+        student2.setKVTags(Arrays.asList(new KVTag("department", "humanities")));
+        studentRepository.save(student2);
+
+        List<Student> students = studentRepository.retrieveByKeyTag("department");
+        assertEquals("size incorrect", 2, students.size());
+    }
+
+    @Test
+    public void givenStudentWithManyTags_whenSave_theyGetByTagOk() {
+        ManyTag tag = new ManyTag("full time");
+        manyTagRepository.save(tag);
+
+        ManyStudent student = new ManyStudent("John");
+        student.setManyTags(Collections.singleton(tag));
+        manyStudentRepository.save(student);
+
+        List<ManyStudent> students = manyStudentRepository.findByManyTags_Name("full time");
+        assertEquals("size incorrect", 1, students.size());
+    }
+}