private void expandManufacturer(
GetEntityUriInfo uriInfo,
URI serviceRoot,
ODataEntityProviderPropertiesBuilder propertiesBuilder)
throws EdmException {
Map<String, ODataCallback> callbacks = new HashMap<String, ODataCallback>();
callbacks.put(ENTITY_NAME_MANUFACTURER, new MyCallback(dataStore, serviceRoot));
ExpandSelectTreeNode expandSelectTreeNode =
UriParser.createExpandSelectTree(uriInfo.getSelect(), uriInfo.getExpand());
propertiesBuilder.expandSelectTree(expandSelectTreeNode).callbacks(callbacks);
}
public ODataResponse readEntity(GetEntityUriInfo uriInfo, String contentType)
throws ODataException {
LOG.debug("Reading Entity: " + uriInfo);
if (uriInfo.getNavigationSegments().size() == 0) {
EdmEntitySet entitySet = uriInfo.getStartEntitySet();
if (ENTITY_SET_NAME_CARS.equals(entitySet.getName())) {
int id = getKeyValue(uriInfo.getKeyPredicates().get(0));
Map<String, Object> data = dataStore.getCar(id);
if (data != null) {
URI serviceRoot = getContext().getPathInfo().getServiceRoot();
ODataEntityProviderPropertiesBuilder propertiesBuilder =
EntityProviderWriteProperties.serviceRoot(serviceRoot);
expandManufacturer(uriInfo, serviceRoot, propertiesBuilder);
return EntityProvider.writeEntry(contentType, entitySet, data, propertiesBuilder.build());
}
} else if (ENTITY_SET_NAME_MANUFACTURERS.equals(entitySet.getName())) {
int id = getKeyValue(uriInfo.getKeyPredicates().get(0));
Map<String, Object> data = dataStore.getManufacturer(id);
if (data != null) {
URI serviceRoot = getContext().getPathInfo().getServiceRoot();
ODataEntityProviderPropertiesBuilder propertiesBuilder =
EntityProviderWriteProperties.serviceRoot(serviceRoot);
expandCars(uriInfo, serviceRoot, propertiesBuilder);
return EntityProvider.writeEntry(contentType, entitySet, data, propertiesBuilder.build());
}
}
throw new ODataNotFoundException(ODataNotFoundException.ENTITY);
} else if (uriInfo.getNavigationSegments().size() == 1) {
// navigation first level, simplified example for illustration
// purposes only
EdmEntitySet entitySet = uriInfo.getTargetEntitySet();
if (ENTITY_SET_NAME_MANUFACTURERS.equals(entitySet.getName())) {
int carKey = getKeyValue(uriInfo.getKeyPredicates().get(0));
return EntityProvider.writeEntry(
contentType,
uriInfo.getTargetEntitySet(),
dataStore.getManufacturer(carKey),
EntityProviderWriteProperties.serviceRoot(getContext().getPathInfo().getServiceRoot())
.build());
}
throw new ODataNotFoundException(ODataNotFoundException.ENTITY);
}
throw new ODataNotImplementedException();
}