/**
* 根据查询HQL与参数列表创建Query对象.
*
* @param values 命名参数,按名称绑定.
*/
public Query createQuery(final String hql, final Map<String, ?> values) {
Assert.hasText(hql, "hql不能为空");
Query query = getSession().createQuery(hql);
if (values != null) {
query.setProperties(values);
}
return query;
}
/**
* 合并对象
*
* @param entity
* @return
*/
public T merge(final T entity) {
Assert.notNull(entity, "entity不能为空");
Session session = getSession();
String idName = getIdName();
PropertyDescriptor idp = BeanUtils.getPropertyDescriptor(entityClass, idName);
PK idvalue = null;
try {
idvalue = (PK) idp.getReadMethod().invoke(entity);
} catch (Exception e) {
throw new FatalBeanException("Could not copy properties from source to target", e);
}
T dest = null;
if (idvalue != null) {
dest = (T) session.get(entityClass, idvalue);
}
if (dest != null) {
// merge the properties
PropertyDescriptor[] descriptors = BeanUtils.getPropertyDescriptors(entityClass);
for (PropertyDescriptor p : descriptors) {
if (p.getWriteMethod() != null) {
try {
Method readMethod = p.getReadMethod();
if (!Modifier.isPublic(readMethod.getDeclaringClass().getModifiers())) {
readMethod.setAccessible(true);
}
Object value = readMethod.invoke(entity);
if (value == null) {
continue;
}
Method writeMethod = p.getWriteMethod();
if (!Modifier.isPublic(writeMethod.getDeclaringClass().getModifiers())) {
writeMethod.setAccessible(true);
}
writeMethod.invoke(dest, value);
} catch (Throwable ex) {
throw new FatalBeanException("Could not copy properties from source to target", ex);
}
}
}
} else {
// destination object is empty, save the entity object parameted
dest = entity;
}
session.saveOrUpdate(dest);
logger.debug("merge entity: {}", entity);
return dest;
}
/**
* 执行HQL进行批量修改/删除操作.
*
* @return 更新记录数.
*/
public int batchExecute(final String hql, final Map<String, ?> values) {
Assert.hasText(hql, "hql不能为空");
return createQuery(hql, values).executeUpdate();
}
/** 按属性查找唯一对象,匹配方式为相等. 查询结果最多有一行，超过一行会抛出异常 */
public T findUniqueBy(final String propertyName, final Object value) {
Assert.hasText(propertyName, "propertyName不能为空");
Criterion criterion = Restrictions.eq(propertyName, value);
return (T) createCriteria(criterion).uniqueResult();
}
/** 按id获取对象. */
public T get(final PK id) {
Assert.notNull(id, "id不能为空");
return (T) getSession().get(entityClass, id);
}
/** 按id删除对象. */
public void delete(final PK id) {
Assert.notNull(id, "id不能为空");
delete(get(id));
logger.debug("delete entity {},id is {}", entityClass.getSimpleName(), id);
}
/**
* 删除对象.
*
* @param entity 对象必须是session中的对象或含id属性的transient对象.
*/
public void delete(final T entity) {
Assert.notNull(entity, "entity不能为空");
getSession().delete(entity);
logger.debug("delete entity: {}", entity);
}
/** 保存新增或修改的对象. */
public void save(final T entity) {
Assert.notNull(entity, "entity不能为空");
getSession().saveOrUpdate(entity);
logger.debug("save entity: {}", entity);
}
