BAEL-7153: Create Criteria from HQL (#18421)

* BAEL-7153: Create Criteria from HQL

* BAEL-7153: Create Criteria from HQL

Author: achraftt

persistence-modules/hibernate-queries/src/test/java/com/baeldung/hibernate/criteria/HqlToCriteriaIntegrationTest.java

@@ -0,0 +1,57 @@
+package com.baeldung.hibernate.criteria;
+
+import com.baeldung.hibernate.criteria.model.Item;
+import com.baeldung.hibernate.criteria.util.HibernateUtil;
+import jakarta.persistence.criteria.CriteriaBuilder;
+import jakarta.persistence.criteria.CriteriaQuery;
+import jakarta.persistence.criteria.Root;
+import org.hibernate.Session;
+import org.junit.Before;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.List;
+
+import static org.junit.Assert.assertTrue;
+
+public class HqlToCriteriaIntegrationTest {
+
+    private static final Logger logger = LoggerFactory.getLogger(HqlToCriteriaIntegrationTest.class);
+
+    private Session session;
+
+    @Before
+    public void setUp() {
+        session = HibernateUtil.getHibernateSession();
+    }
+
+    @Test
+    public void givenHqlQuery_whenConvertedToCriteriaQuery_thenReturnsFilteredResults() {
+        // Step 1: Get the CriteriaBuilder from the session
+        CriteriaBuilder builder = session.getCriteriaBuilder();
+
+        // Step 2: Create a CriteriaQuery using HQL (as a string)
+        // HQL query: "select itemId, itemName from Item order by itemPrice"
+        CriteriaQuery<Object[]> hqlCriteria = session.getCriteriaBuilder()
+                .createQuery("select itemId, itemName from Item order by itemPrice", Object[].class);
+
+        // Step 3: Mutate the CriteriaQuery
+        // Let's add a WHERE clause to filter items with itemPrice > 100
+        Root<Item> root = hqlCriteria.from(Item.class);
+        hqlCriteria.where(builder.greaterThan(root.get("itemPrice"), 100));
+
+        // Step 4: Execute the query and get the result list
+        List<Object[]> resultList = session.createQuery(hqlCriteria).getResultList();
+
+        // Step 5: Simple assertion to check if the result is not empty
+        assertTrue("The result list should contain items", resultList.size() > 0);
+
+        // Log results for demonstration purposes
+        for (Object[] result : resultList) {
+            Integer itemId = (Integer) result[0];
+            String itemName = (String) result[1];
+            logger.info("Item ID: {}, Item Name: {}", itemId, itemName);
+        }
+    }
+}