Java EntityPersister.getPropertyNullability方法代码示例

import org.hibernate.persister.entity.EntityPersister; //导入方法依赖的package包/类
/**
 * Find all non-nullable references to entities that have not yet
 * been inserted in the database, where the foreign key
 * is a reference to an unsaved transient entity. .
 *
 * @param entityName - the entity name
 * @param entity - the entity instance
 * @param values - insertable properties of the object (including backrefs),
 * possibly with substitutions
 * @param isEarlyInsert - true if the entity needs to be executed as soon as possible
 * (e.g., to generate an ID)
 * @param session - the session
 *
 * @return the transient unsaved entity dependencies that are non-nullable,
 *         or null if there are none.
 */
public static NonNullableTransientDependencies findNonNullableTransientEntities(
		String entityName,
		Object entity,
		Object[] values,
		boolean isEarlyInsert,
		SessionImplementor session) {
	final Nullifier nullifier = new Nullifier( entity, false, isEarlyInsert, session );
	final EntityPersister persister = session.getEntityPersister( entityName, entity );
	final String[] propertyNames = persister.getPropertyNames();
	final Type[] types = persister.getPropertyTypes();
	final boolean[] nullability = persister.getPropertyNullability();
	final NonNullableTransientDependencies nonNullableTransientEntities = new NonNullableTransientDependencies();
	for ( int i = 0; i < types.length; i++ ) {
		collectNonNullableTransientEntities(
				nullifier,
				values[i],
				propertyNames[i],
				types[i],
				nullability[i],
				session,
				nonNullableTransientEntities
		);
	}
	return nonNullableTransientEntities.isEmpty() ? null : nonNullableTransientEntities;
}
 

import org.hibernate.persister.entity.EntityPersister; //导入方法依赖的package包/类
/**
 * Check nullability of the class persister properties
 *
 * @param values entity properties
 * @param persister class persister
 * @param isUpdate whether it is intended to be updated or saved
 *
 * @throws PropertyValueException Break the nullability of one property
 * @throws HibernateException error while getting Component values
 */
public void checkNullability(
		final Object[] values,
		final EntityPersister persister,
		final boolean isUpdate) throws HibernateException {
	/*
	 * Typically when Bean Validation is on, we don't want to validate null values
	 * at the Hibernate Core level. Hence the checkNullability setting.
	 */
	if ( checkNullability ) {
		/*
		  * Algorithm
		  * Check for any level one nullability breaks
		  * Look at non null components to
		  *   recursively check next level of nullability breaks
		  * Look at Collections contraining component to
		  *   recursively check next level of nullability breaks
		  *
		  *
		  * In the previous implementation, not-null stuffs where checked
		  * filtering by level one only updateable
		  * or insertable columns. So setting a sub component as update="false"
		  * has no effect on not-null check if the main component had good checkeability
		  * In this implementation, we keep this feature.
		  * However, I never see any documentation mentioning that, but it's for
		  * sure a limitation.
		  */

		final boolean[] nullability = persister.getPropertyNullability();
		final boolean[] checkability = isUpdate ?
			persister.getPropertyUpdateability() :
			persister.getPropertyInsertability();
		final Type[] propertyTypes = persister.getPropertyTypes();

		for ( int i = 0; i < values.length; i++ ) {

			if ( checkability[i] && values[i]!= LazyPropertyInitializer.UNFETCHED_PROPERTY ) {
				final Object value = values[i];
				if ( !nullability[i] && value == null ) {

					//check basic level one nullablilty
					throw new PropertyValueException(
							"not-null property references a null or transient value",
							persister.getEntityName(),
							persister.getPropertyNames()[i]
						);

				}
				else if ( value != null ) {
					//values is not null and is checkable, we'll look deeper
					final String breakProperties = checkSubElementsNullability( propertyTypes[i], value );
					if ( breakProperties != null ) {
						throw new PropertyValueException(
							"not-null property references a null or transient value",
							persister.getEntityName(),
							buildPropertyPath( persister.getPropertyNames()[i], breakProperties )
						);
					}

				}
			}

		}
	}
}