Examples with LoadState javax.persistence.spi.LoadState used on opensource projects

Example 1 with LoadState

use of javax.persistence.spi.LoadState in project hibernate-orm by hibernate.

the class PersistenceUnitUtilImpl method isLoaded.

@Override
public boolean isLoaded(Object entity, String attributeName) {
    // added log message to help with HHH-7454, if state == LoadState,NOT_LOADED, returning true or false is not accurate.
    log.debug("PersistenceUnitUtil#isLoaded is not always accurate; consider using EntityManager#contains instead");
    LoadState state = PersistenceUtilHelper.isLoadedWithoutReference(entity, attributeName, cache);
    if (state == LoadState.LOADED) {
        return true;
    } else if (state == LoadState.NOT_LOADED) {
        return false;
    } else {
        return PersistenceUtilHelper.isLoadedWithReference(entity, attributeName, cache) != LoadState.NOT_LOADED;
    }
}

Example 2 with LoadState

use of javax.persistence.spi.LoadState in project hibernate-orm by hibernate.

the class PersistenceUtilHelper method isLoadedWithoutReference.

/**
	 * Is the given attribute (by name) loaded?  This form must take care to not access the attribute (trigger
	 * initialization).
	 *
	 * @param entity The entity
	 * @param attributeName The name of the attribute to check
	 * @param cache The cache we maintain of attribute resolutions
	 *
	 * @return The LoadState
	 */
public static LoadState isLoadedWithoutReference(Object entity, String attributeName, MetadataCache cache) {
    boolean sureFromUs = false;
    if (entity instanceof HibernateProxy) {
        LazyInitializer li = ((HibernateProxy) entity).getHibernateLazyInitializer();
        if (li.isUninitialized()) {
            // we have an uninitialized proxy, the attribute cannot be loaded
            return LoadState.NOT_LOADED;
        } else {
            // swap the proxy with target (for proper class name resolution)
            entity = li.getImplementation();
        }
        sureFromUs = true;
    }
    // we are instrumenting but we can't assume we are the only ones
    if (entity instanceof PersistentAttributeInterceptable) {
        final LazyAttributeLoadingInterceptor interceptor = extractInterceptor((PersistentAttributeInterceptable) entity);
        final boolean isInitialized = interceptor == null || interceptor.isAttributeLoaded(attributeName);
        LoadState state;
        if (isInitialized && interceptor != null) {
            // it's ours, we can read
            try {
                final Class entityClass = entity.getClass();
                final Object attributeValue = cache.getClassMetadata(entityClass).getAttributeAccess(attributeName).extractValue(entity);
                state = isLoaded(attributeValue);
                // it's ours so we know it's loaded
                if (state == LoadState.UNKNOWN) {
                    state = LoadState.LOADED;
                }
            } catch (AttributeExtractionException ignore) {
                state = LoadState.UNKNOWN;
            }
        } else if (interceptor != null) {
            state = LoadState.NOT_LOADED;
        } else if (sureFromUs) {
            // it's ours, we can read
            try {
                final Class entityClass = entity.getClass();
                final Object attributeValue = cache.getClassMetadata(entityClass).getAttributeAccess(attributeName).extractValue(entity);
                state = isLoaded(attributeValue);
                // it's ours so we know it's loaded
                if (state == LoadState.UNKNOWN) {
                    state = LoadState.LOADED;
                }
            } catch (AttributeExtractionException ignore) {
                state = LoadState.UNKNOWN;
            }
        } else {
            state = LoadState.UNKNOWN;
        }
        return state;
    } else {
        return LoadState.UNKNOWN;
    }
}