本文整理汇总了Java中javax.persistence.PersistenceUnitUtil.isLoaded方法的典型用法代码示例。如果您正苦于以下问题：Java PersistenceUnitUtil.isLoaded方法的具体用法？Java PersistenceUnitUtil.isLoaded怎么用？Java PersistenceUnitUtil.isLoaded使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类javax.persistence.PersistenceUnitUtil的用法示例。
在下文中一共展示了PersistenceUnitUtil.isLoaded方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: isLoaded
import javax.persistence.PersistenceUnitUtil; //导入方法依赖的package包/类
/**
* checks if the entity and all its properties are completely loaded from the database and all lazy properties are
* initialised.
*
* @param em
* EntityManager for loading the entity
* @param entity
* @return
*/
public static boolean isLoaded(EntityManager em, Object entity) {
if (entity == null) {
return true;
}
log.debug("check load state!");
if (!em.contains(entity)) {
log.debug("Entity is not in persistence context. Cannot check load state");
// return true;
}
PersistenceUnitUtil util = em.getEntityManagerFactory().getPersistenceUnitUtil();
if (util == null) {
log.debug("no PersistenceUnitUtil");
return true;
}
boolean loadstate = true;
Class<?> clazz = entity.getClass();
while (clazz != null) {
Field[] fields = clazz.getDeclaredFields();
for (Field f : fields) {
if (Modifier.isStatic(f.getModifiers())) continue;
if (Modifier.isTransient(f.getModifiers())) continue;
if (AnnotationUtil.isFieldOrGetterOrSetterAnnotationPresent(clazz, f, Transient.class)) continue;
boolean loaded = util.isLoaded(entity, f.getName());
log.debug(f.getName() + " [" + f.getType() + "] loaded: " + loaded);
if (!loaded) loadstate = false;
}
clazz = clazz.getSuperclass();
}
return loadstate;
}
示例2: initialize
import javax.persistence.PersistenceUnitUtil; //导入方法依赖的package包/类
/**
* Initialize a entity.
* @param em entity manager to use
* @param entity entity to initialize
* @param depth max depth on recursion
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public static void initialize(EntityManager em, Object entity, int depth) {
// return on nulls, depth = 0 or already initialized objects
if (entity == null || depth == 0) {
return;
}
PersistenceUnitUtil unitUtil = em.getEntityManagerFactory().getPersistenceUnitUtil();
EntityType entityType = em.getMetamodel().entity(entity.getClass());
Set<Attribute> attributes = entityType.getDeclaredAttributes();
Object id = unitUtil.getIdentifier(entity);
if (id != null) {
Object attached = em.find(entity.getClass(), unitUtil.getIdentifier(entity));
for (Attribute a : attributes) {
if (!unitUtil.isLoaded(entity, a.getName())) {
if (a.isCollection()) {
intializeCollection(em, entity, attached, a, depth);
}
else if(a.isAssociation()) {
intialize(em, entity, attached, a, depth);
}
}
}
}
}
示例3: isInitialized
import javax.persistence.PersistenceUnitUtil; //导入方法依赖的package包/类
public boolean isInitialized(final Object value) {
PersistenceUnitUtil persistenceUnitUtil = entityManager.getEntityManagerFactory().getPersistenceUnitUtil();
return persistenceUnitUtil.isLoaded(value);
}