java:hibernate:genericdao

차이

문서의 선택한 두 판 사이의 차이를 보여줍니다.

차이 보기로 링크

@@ 줄 1: / 줄 1: @@
+====== Hibernate Generic Dao ======
+  * https://community.jboss.org/wiki/GenericDataAccessObjects
+===== Generic Dao Interface =====
+<code java>
+public interface GenericDAO<T, ID extends Serializable> {
+    T findById(ID id, boolean lock);
+    List<T> findAll();
+    List<T> findByExample(T exampleInstance);
+    T makePersistent(T entity);
+    void makeTransient(T entity);
+}
+</code>
+===== Generic Dao class =====
+<code java>
+public abstract class GenericHibernateDAO<T, ID extends Serializable>
+        implements GenericDAO<T, ID> {
+    private Class<T> persistentClass;
+    private Session session;
+    public GenericHibernateDAO() {
+        this.persistentClass = (Class<T>) ((ParameterizedType) getClass()
+                                .getGenericSuperclass()).getActualTypeArguments()[0];
+     }
+    @SuppressWarnings("unchecked")
+    public void setSession(Session s) {
+        this.session = s;
+    }
+    protected Session getSession() {
+        if (session == null)
+            throw new IllegalStateException("Session has not been set on DAO before usage");
+        return session;
+    }
+    public Class<T> getPersistentClass() {
+        return persistentClass;
+    }
+    @SuppressWarnings("unchecked")
+    public T findById(ID id, boolean lock) {
+        T entity;
+        if (lock)
+            entity = (T) getSession().load(getPersistentClass(), id, LockMode.UPGRADE);
+        else
+            entity = (T) getSession().load(getPersistentClass(), id);
+        return entity;
+    }
+    @SuppressWarnings("unchecked")
+    public List<T> findAll() {
+        return findByCriteria();
+    }
+    @SuppressWarnings("unchecked")
+    public List<T> findByExample(T exampleInstance, String[] excludeProperty) {
+        Criteria crit = getSession().createCriteria(getPersistentClass());
+        Example example =  Example.create(exampleInstance);
+        for (String exclude : excludeProperty) {
+            example.excludeProperty(exclude);
+        }
+        crit.add(example);
+        return crit.list();
+    }
+    @SuppressWarnings("unchecked")
+    public T makePersistent(T entity) {
+        getSession().saveOrUpdate(entity);
+        return entity;
+    }
+    public void makeTransient(T entity) {
+        getSession().delete(entity);
+    }
+    public void flush() {
+        getSession().flush();
+    }
+    public void clear() {
+        getSession().clear();
+    }
+    /**
+     * Use this inside subclasses as a convenience method.
+     */
+    @SuppressWarnings("unchecked")
+    protected List<T> findByCriteria(Criterion... criterion) {
+        Criteria crit = getSession().createCriteria(getPersistentClass());
+        for (Criterion c : criterion) {
+            crit.add(c);
+        }
+        return crit.list();
+   }
+}
+</code>

java/hibernate/genericdao.txt · 마지막으로 수정됨: 2013/08/28 15:30 저자 kwon37xi