initial import

3 files changed, 93 insertions, 0 deletions

diff --git a/src/main/java/nu/xss/jpa/dao/AbstractJpaDao.java b/src/main/java/nu/xss/jpa/dao/AbstractJpaDao.java
new file mode 100644
index 0000000..aef1aaf
--- /dev/null
+++ b/src/main/java/nu/xss/jpa/dao/AbstractJpaDao.java
@@ -0,0 +1,40 @@
+package nu.xss.jpa.dao;
+
+import java.io.Serializable;
+import java.util.List;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+
+public abstract class AbstractJpaDao<E, K> implements Dao<E, K>, Serializable {
+	
+	private static final long serialVersionUID = 4998055731089977476L;
+	
+	@PersistenceContext(unitName="mainPU")
+	protected EntityManager entityManager;
+	
+	protected Class<E> entity;
+	
+	public AbstractJpaDao(final Class<E> entity) {
+		this.entity = (Class<E>) entity;
+	}
+	
+	public void persist(E entity) {
+		entityManager.persist(entity);
+		
+	}
+
+	public void remove(E entity) {
+		entityManager.remove(entity);
+	}
+
+	public E findById(K id) {
+		return entityManager.find(entity, id);
+	}
+
+	public List<E> findAll() {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
+}
diff --git a/src/main/java/nu/xss/jpa/dao/Dao.java b/src/main/java/nu/xss/jpa/dao/Dao.java
new file mode 100644
index 0000000..b91c834
--- /dev/null
+++ b/src/main/java/nu/xss/jpa/dao/Dao.java
@@ -0,0 +1,10 @@
+package nu.xss.jpa.dao;
+
+import java.util.List;
+
+public interface Dao<E, K> {
+    void persist(E entity);
+    void remove(E entity);
+    E findById(K id);
+    List<E> findAll();
+}
diff --git a/src/main/java/nu/xss/jpa/dao/GenericJpaDao.java b/src/main/java/nu/xss/jpa/dao/GenericJpaDao.java
new file mode 100644
index 0000000..5acfffc
--- /dev/null
+++ b/src/main/java/nu/xss/jpa/dao/GenericJpaDao.java
@@ -0,0 +1,43 @@
+package nu.xss.jpa.dao;
+
+import java.io.Serializable;
+import java.lang.reflect.ParameterizedType;
+import java.util.List;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+
+public abstract class GenericJpaDao<E,K> implements Dao<E,K>, Serializable {
+	
+	private static final long serialVersionUID = 4998055731089977476L;
+	
+	@PersistenceContext
+	protected EntityManager entityManager;
+	
+	protected Class<E> entity;
+	
+	@SuppressWarnings("unchecked")
+	public GenericJpaDao() {
+		ParameterizedType genericSuperclass = (ParameterizedType) getClass().getGenericSuperclass();
+		this.entity = (Class<E>) genericSuperclass.getActualTypeArguments()[1];
+	}
+	
+	public void persist(E entity) {
+		entityManager.persist(entity);
+		
+	}
+
+	public void remove(E entity) {
+		entityManager.remove(entity);
+	}
+
+	public E findById(K id) {
+		return entityManager.find(entity, id);
+	}
+
+	public List<E> findAll() {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
+}