UseCase_RideSharing_JavaSDK_getItemSimTopN.java

import io.prediction.ItemSimGetTopNRequestBuilder;

// You need to specify the name of the engine from which you want to retrieve the prediction results. 
// Add the following code to display similar sightseeing spots to the user after arriving a destination:

String[] destinationIds;
 
try {
 //retreive top 5 similar sightseeing spots from the item similarity engine
 String[] itypes = {"sightseeing"}
 ItemSimGetTopNRequestBuilder builder = client.getItemSimGetTopNRequestBuilder("the engine name", "arrived destination id", 5)
  .itypes(itypes);
 destinationIds = client.getItemSimTopN(builder);
} catch (Exception e) { // exception is raised when there is no prediction result.
 destinationIds = getDefaultSightSeeingSpots(5); // eg. get nearest 5 sightseeing spots
 handleException(e);
}
 
displaySightSeeingSpots(destinationIds); // display similar sightseeing spots to the user