Добавил JPA для личных сообщений

pom.xml

@@ -52,6 +52,16 @@
             <artifactId>lombok</artifactId>
             <version>1.18.8</version>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.data</groupId>
+            <artifactId>spring-data-jpa</artifactId>
+            <version>2.1.3.RELEASE</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.persistence</groupId>
+            <artifactId>javax.persistence-api</artifactId>
+            <version>2.2</version>
+        </dependency>
     </dependencies>
 
     <developers>

src/main/java/org/sadtech/social/core/domain/content/Mail.java

@@ -5,6 +5,8 @@ import lombok.EqualsAndHashCode;
 import org.sadtech.social.core.domain.content.attachment.Attachment;
 import org.sadtech.social.core.utils.Description;
 
+import javax.persistence.Entity;
+import javax.persistence.Table;
 import java.util.List;
 
 /**
@@ -12,8 +14,10 @@ import java.util.List;
  *
  * @author upagge [08/07/2019]
  */
-@EqualsAndHashCode(callSuper = true)
 @Data
+@Entity
+@Table(name = "mail")
+@EqualsAndHashCode(callSuper = true)
 public class Mail extends Message {
 
     @Description("Вложения к сообщению")

src/main/java/org/sadtech/social/core/domain/content/Message.java

@@ -1,8 +1,12 @@
 package org.sadtech.social.core.domain.content;
 
+import com.sun.istack.internal.NotNull;
 import lombok.Data;
 import org.sadtech.social.core.utils.Description;
 
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
 import java.time.LocalDateTime;
 
 /**
@@ -11,17 +15,22 @@ import java.time.LocalDateTime;
  * @author upagge [08/07/2019]
  */
 @Data
+@Entity
 public abstract class Message {
 
+    @Id
+    @GeneratedValue
     @Description("Идентификатор сообщения")
     private Integer id;
 
     @Description("Тип сообщения")
     protected ContentType type;
 
+    @NotNull
     @Description("Дата создания")
     private LocalDateTime createDate;
 
+    @NotNull
     @Description("Идентификатор пользователя, отправившего сообщение")
     private Integer personId;
 

src/main/java/org/sadtech/social/core/repository/jpa/MailRepositoryJpa.java

@@ -0,0 +1,32 @@
+package org.sadtech.social.core.repository.jpa;
+
+import org.sadtech.social.core.domain.content.Mail;
+import org.sadtech.social.core.repository.ContentRepository;
+import org.sadtech.social.core.repository.jpa.impl.MailRepository;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+/**
+ * TODO: Добавить описание класса.
+ *
+ * @author upagge [25/07/2019]
+ */
+public class MailRepositoryJpa implements ContentRepository<Mail> {
+
+    private final MailRepository mailRepository;
+
+    public MailRepositoryJpa(MailRepository mailRepository) {
+        this.mailRepository = mailRepository;
+    }
+
+    @Override
+    public Integer add(Mail content) {
+        return mailRepository.saveAndFlush(content).getId();
+    }
+
+    @Override
+    public List<Mail> findByTime(LocalDateTime timeFrom, LocalDateTime timeTo) {
+        return mailRepository.findByCreateDateBetween(timeFrom, timeTo);
+    }
+}

src/main/java/org/sadtech/social/core/repository/jpa/impl/MailRepository.java

@@ -0,0 +1,18 @@
+package org.sadtech.social.core.repository.jpa.impl;
+
+import org.sadtech.social.core.domain.content.Mail;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+/**
+ * TODO: Добавить описание интерфейса.
+ *
+ * @author upagge [27/07/2019]
+ */
+public interface MailRepository extends JpaRepository<Mail, Integer> {
+
+    List<Mail> findByCreateDateBetween(LocalDateTime from, LocalDateTime to);
+
+}