first commit with existing project files

2025-05-15 11:37:34 +02:00
parent 86bdf6e81a
commit ff55029ce2
13 changed files with 596 additions and 0 deletions
--- a/hibernate-project/src/main/java/com/humanbooster/dao/GenericDaoImpl.java
+++ b/hibernate-project/src/main/java/com/humanbooster/dao/GenericDaoImpl.java
@@ -0,0 +1,65 @@
+package com.humanbooster.dao;
+
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+
+import java.util.List;
+
+public abstract class GenericDaoImpl<T, ID> implements GenericDao<T, ID> {
+
+    private final Class<T> entityClass;
+    protected SessionFactory sessionFactory;
+
+    public GenericDaoImpl(SessionFactory sessionFactory, Class<T> entityClass) {
+        this.sessionFactory = sessionFactory;
+        this.entityClass = entityClass;
+    }
+
+    @Override
+    public void create(T entity) {
+        try (Session session = sessionFactory.openSession()) {
+            session.beginTransaction();
+            session.persist(entity);
+            session.getTransaction().commit();
+        }
+    }
+
+    @Override
+    public T read(ID id) {
+        try (Session session = sessionFactory.openSession()) {
+            session.beginTransaction();
+            T entity = session.get(entityClass, id);
+            session.getTransaction().commit();
+            return entity;
+        }
+    }
+
+    @Override
+    public void update(T entity) {
+        try (Session session = sessionFactory.openSession()) {
+            session.beginTransaction();
+            session.merge(entity);
+            session.getTransaction().commit();
+        }
+    }
+
+    @Override
+    public void delete(ID id) {
+        try (Session session = sessionFactory.openSession()) {
+            session.beginTransaction();
+            T entity = session.get(entityClass, id);
+            if (entity != null) session.remove(entity);
+            session.getTransaction().commit();
+        }
+    }
+
+    @Override
+    public List<T> findAll() {
+        try (Session session = sessionFactory.openSession()) {
+            session.beginTransaction();
+            List<T> entities = session.createQuery("from " + entityClass.getName(), entityClass).list();
+            session.getTransaction().commit();
+            return entities;
+        }
+    }
+}