jpa cast error

2018-11-09 20:54:10 +01:00
parent a8ee73cfc9
commit 61ffac2c77
5 changed files with 193 additions and 0 deletions
@@ -0,0 +1,58 @@
+package com.baeldung.jpa.stringcast;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.EntityTransaction;
+import javax.persistence.Persistence;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+public class SpringCastTest {
+
+    private static EntityManager em;
+    private static EntityManagerFactory emFactory;
+
+    @BeforeClass
+    public static void setup() {
+        emFactory = Persistence.createEntityManagerFactory("jpa-h2");
+        em = emFactory.createEntityManager();
+
+        // insert an object into the db
+        DummyEntity dummyEntity = new DummyEntity();
+        dummyEntity.setText("text");
+
+        EntityTransaction tr = em.getTransaction();
+        tr.begin();
+        em.persist(dummyEntity);
+        tr.commit();
+    }
+
+    @Test(expected = ClassCastException.class)
+    public void givenExecutorNoCastCheck_whenQueryReturnsOneColumn_thenClassCastThrown() {
+        List<String[]> results = QueryExecutor.executeNativeQueryNoCastCheck("select text from dummy", em);
+
+        // fails
+        for (String[] row : results) {
+            // do nothing
+        }
+    }
+
+    @Test
+    public void givenExecutorWithCastCheck_whenQueryReturnsOneColumn_thenNoClassCastThrown() {
+        List<String[]> results = QueryExecutor.executeNativeQueryWithCastCheck("select text from dummy", em);
+        assertEquals("text", results.get(0)[0]);
+    }
+
+    @Test
+    public void givenExecutorGeneric_whenQueryReturnsOneColumn_thenNoClassCastThrown() {
+        List<DummyEntity> results = QueryExecutor.executeNativeQueryGeneric("select text from dummy", "textQueryMapping", em);
+        assertEquals("text", results
+          .get(0)
+          .getText());
+    }
+
+}
@@ -17,5 +17,40 @@
 			<property name="hibernate.show_sql" value="true" />
 		</properties>
 	</persistence-unit>
+
+	<persistence-unit name="jpa-h22">
+		<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
+		<class>com.baeldung.jpa.stringcast.DummyEntity</class>
+		<properties>
+			<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
+			<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test" />
+			<property name="javax.persistence.jdbc.user" value="sa" />
+			<property name="javax.persistence.jdbc.password" value="" />
+			<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
+			<property name="hibernate.hbm2ddl.auto" value="create-drop" />
+			<property name="show_sql" value="true"/>
+			<property name="hibernate.temp.use_jdbc_metadata_defaults" value="false"/>
+		</properties>
+	</persistence-unit>
+
+	<persistence-unit name="h2" transaction-type="RESOURCE_LOCAL">
+
+		<!-- add classes -->
+		<class>com.baeldung.jpa.stringcast.DummyEntity</class>
+
+		<properties>
+			<!-- Configuring JDBC properties -->
+			<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test;DB_CLOSE_DELAY=-1"/>
+			<property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/>
+
+			<!-- Hibernate properties -->
+			<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"/>
+			<property name="hibernate.hbm2ddl.auto" value="validate"/>
+			<property name="hibernate.format_sql" value="false"/>
+			<property name="hibernate.show_sql" value="true"/>
+
+		</properties>
+	</persistence-unit>
+
 </persistence>