Java Code Examples for org.apache.olingo.commons.api.edm.EdmNavigationProperty#getName()

/**
 * This method return the entity collection which are able to navigate from the parent entity (source) using uri navigation properties.
 * <p/>
 * In this method we check the parent entities primary keys and return the entity according to the values.
 * we use ODataDataHandler, navigation properties to get particular foreign keys.
 *
 * @param metadata     Service Metadata
 * @param parentEntity parentEntity
 * @param navigation   UriResourceNavigation
 * @return EntityCollection
 * @throws ODataServiceFault
 */
private EntityCollection getNavigableEntitySet(ServiceMetadata metadata, Entity parentEntity,
                                               EdmNavigationProperty navigation, String url)
        throws ODataServiceFault, ODataApplicationException {
    EdmEntityType type = metadata.getEdm().getEntityType(new FullQualifiedName(parentEntity.getType()));
    String linkName = navigation.getName();
    List<Property> properties = new ArrayList<>();
    Map<String, EdmProperty> propertyMap = new HashMap<>();
    for (NavigationKeys keys : this.dataHandler.getNavigationProperties().get(type.getName())
                                               .getNavigationKeys(linkName)) {
        Property property = parentEntity.getProperty(keys.getPrimaryKey());
        if (property != null && !property.isNull()) {
            propertyMap.put(keys.getForeignKey(), (EdmProperty) type.getProperty(property.getName()));
            property.setName(keys.getForeignKey());
            properties.add(property);
        }
    }
    if(!properties.isEmpty()) {
        return createEntityCollectionFromDataEntryList(linkName, dataHandler
                .readTableWithKeys(linkName, wrapPropertiesToDataEntry(type, properties, propertyMap)), url);
    }
    return null;
}
 

/**
 * This method return the entity which is able to navigate from the parent entity (source) using uri navigation properties.
 * <p/>
 * In this method we check the parent entities foreign keys and return the entity according to the values.
 * we use ODataDataHandler, navigation properties to get particular foreign keys.
 *
 * @param metadata     Service Metadata
 * @param parentEntity Entity (Source)
 * @param navigation   UriResourceNavigation (Destination)
 * @return Entity (Destination)
 * @throws ODataApplicationException
 * @throws ODataServiceFault
 * @see ODataDataHandler#getNavigationProperties()
 */
private Entity getNavigableEntity(ServiceMetadata metadata, Entity parentEntity, EdmNavigationProperty navigation,
                                  String baseUrl) throws ODataApplicationException, ODataServiceFault {
    EdmEntityType type = metadata.getEdm().getEntityType(new FullQualifiedName(parentEntity.getType()));
    String linkName = navigation.getName();
    List<Property> properties = new ArrayList<>();
    Map<String, EdmProperty> propertyMap = new HashMap<>();
    for (NavigationKeys keys : this.dataHandler.getNavigationProperties().get(linkName)
                                               .getNavigationKeys(type.getName())) {
        Property property = parentEntity.getProperty(keys.getForeignKey());
        if (property != null && !property.isNull()) {
            propertyMap.put(keys.getPrimaryKey(), (EdmProperty) type.getProperty(property.getName()));
            property.setName(keys.getPrimaryKey());
            properties.add(property);
        }
    }
    EntityCollection results = null;
    if (!properties.isEmpty()) {
        results = createEntityCollectionFromDataEntryList(linkName, dataHandler
                .readTableWithKeys(linkName, wrapPropertiesToDataEntry(type, properties, propertyMap)), baseUrl);
    }
    if (results != null && !results.getEntities().isEmpty()) {
        return results.getEntities().get(0);
    } else {
        if (log.isDebugEnabled()) {
            log.debug("Reference is not found.");
        }
        return null;
    }
}
 

/**
 * Check if jsonNode is not null or if null but nullable or collection navigationProperty
 *
 * @param jsonNode related json node
 * @param edmNavigationProperty related navigation property
 * @throws DeserializerException if jsonNode is not null or if null but nullable or collection navigationProperty
 */
private void checkNotNullOrValidNull(final JsonNode jsonNode,
    final EdmNavigationProperty edmNavigationProperty) throws DeserializerException {
  boolean isNullable = edmNavigationProperty.isNullable();
  if ((jsonNode.isNull() && !isNullable) || (jsonNode.isNull() && edmNavigationProperty.isCollection())) {
    throw new DeserializerException("Property: " + edmNavigationProperty.getName() + " must not be null.",
        MessageKeys.INVALID_NULL_PROPERTY, edmNavigationProperty.getName());
  }
}
 

private NavPropertyBindingDetails getNavigationBindings(
        final EdmStructuredType sourceEntityType, final EdmNavigationProperty property) {

  if (sourceEntityType == null) {
    throw new IllegalStateException("Invalid navigation property " + property.getName());
  }

  try {
    return new NavPropertyBindingDetails(edm, sourceEntityType, property);
  } catch (IllegalStateException ignore) {
    return getNavigationBindingDetails(sourceEntityType.getBaseType(), property);
  }
}
 

private void applyExpandOptionToEntity(final Entity entity, final EdmBindingTarget edmBindingTarget,
    final ExpandOption expandOption, final UriInfoResource uriInfo, final Edm edm) throws ODataApplicationException {

  final EdmEntityType entityType = edmBindingTarget.getEntityType();

  for (ExpandItem item : expandOption.getExpandItems()) {
    if(item.getLevelsOption() != null) {
      throw new ODataApplicationException("$levels is not implemented", 
          HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
    }
    
    List<EdmNavigationProperty> navigationProperties = new ArrayList<EdmNavigationProperty>();
    if(item.isStar()) {
      List<EdmNavigationPropertyBinding> bindings = edmBindingTarget.getNavigationPropertyBindings();
      for (EdmNavigationPropertyBinding binding : bindings) {
        EdmElement property = entityType.getProperty(binding.getPath());
        if(property instanceof EdmNavigationProperty) {
          navigationProperties.add((EdmNavigationProperty) property);
        }
      }
    } else {
      final List<UriResource> uriResourceParts = item.getResourcePath().getUriResourceParts();
      if (uriResourceParts.get(0) instanceof UriResourceNavigation) {
        navigationProperties.add(((UriResourceNavigation) uriResourceParts.get(0)).getProperty());
      }
    }

    for (EdmNavigationProperty navigationProperty: navigationProperties) {
      final String navPropertyName = navigationProperty.getName();
      final EdmBindingTarget targetEdmEntitySet = edmBindingTarget.getRelatedBindingTarget(navPropertyName);

      final Link link = entity.getNavigationLink(navPropertyName);
      if (link != null && entityType.getNavigationProperty(navPropertyName).isCollection()) {
        applyOptionsToEntityCollection(link.getInlineEntitySet(),
            targetEdmEntitySet,
            item.getFilterOption(),
            item.getOrderByOption(),
            item.getCountOption(),
            item.getSkipOption(),
            item.getTopOption(),
            item.getExpandOption(),
            uriInfo, edm);
      }
    }
  }
}