Develop Reference

EBay API Call Get Seller Transactions not Returning Seller Feedback Rating

I'm using the GetSellerTransactionsCall from eBay Trading API to obtain transaction from an eBay Seller.
According to eBay Documentation this call is suppose to return a Seller object which contains a UserType with the following data:
Seller Object
User Type with Feedback Star Rating
I'm using the code below to execute Get Seller Transactions Call:
GetSellerTransactionsCall getSellerTransactionsCall = new GetSellerTransactionsCall();
getSellerTransactionsCall.setApiContext(ebayAPI.getAPIContext(profileID));
DetailLevelCodeType[] detailsLevels = new DetailLevelCodeType[1];
detailsLevels[0] = DetailLevelCodeType.RETURN_ALL;
getSellerTransactionsCall.setDetailLevel(detailsLevels);
getSellerTransactionsCall.setIncludeFinalValueFee(true);
TransactionType[] transactionTypes = getSellerTransactionsCall.getSellerTransactions();
UserType sellerAsUserType = getSellerTransactionsCall.getSeller();
System.out.println("Seller: " +sellerAsUserType ); // Prints null
FeedbackRatingStarCodeType feedbackRatingStarCodeType = sellerAsUserType.getFeedbackRatingStar();
System.out.println("Feedback Rating Star Code: " + feedbackRatingStarCodeType); // Prints null
I know the call itself is successful as I am able to iterate through all transactions of the given seller - so this is not a question of whether the call was successful or not.
Why are sellerAsUserType and feedbackRatingStarCodeType both null?

How to pass “values” attribute as array of strings in payload object in case of Googles AUTOML TABLE?

We are  using Google cloud service AUTOML TABLES for online prediction.
We have created, trained and deployed the model. The model is giving predictions using the Google console. We are trying to integrate this model in our java code.
We are not able to pass “values”  attribute as array of strings in payload object in java code. We haven’t found anything for this in documentation.
Please find the links we are using for this:
https://cloud.google.com/automl-tables/docs/samples/automl-tables-predict
Please find the json object in the screenshot.
Please let us know how to pass “values”  attribute as array of strings in payload object?
Thanks.

Based from the reference you are following, to be able to populate "values" you need to define it at the main(). You can refer to Class Value.Builder if you need to set Numbers, Null, etc. values.
List<Value> values = new ArrayList<>();
values.add(Value.newBuilder().setStringValue("This is test data.").build());
// add more elements in values as needed
This list values will be used in Row that accepts iterable protobuf value. See Row.newBuilder.addAllValues().
Row row = Row.newBuilder().addAllValues(values).build();
Using these, the payload is complete and a prediction request be built:
ExamplePayload payload = ExamplePayload.newBuilder().setRow(row).build();
PredictRequest request =
PredictRequest.newBuilder()
.setName(name.toString())
.setPayload(payload)
.putParams("feature_importance", "true")
.build();
PredictResponse response = client.predict(request);
Your full prediction code should look like this:
import com.google.cloud.automl.v1beta1.AnnotationPayload;
import com.google.cloud.automl.v1beta1.ExamplePayload;
import com.google.cloud.automl.v1beta1.ModelName;
import com.google.cloud.automl.v1beta1.PredictRequest;
import com.google.cloud.automl.v1beta1.PredictResponse;
import com.google.cloud.automl.v1beta1.PredictionServiceClient;
import com.google.cloud.automl.v1beta1.Row;
import com.google.cloud.automl.v1beta1.TablesAnnotation;
import com.google.protobuf.Value;
import com.google.protobuf.NullValue;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
class TablesPredict {
public static void main(String[] args) throws IOException {
// TODO(developer): Replace these variables before running the sample.
String projectId = "your-project-id";
String modelId = "TBL9999999999";
// Values should match the input expected by your model.
List<Value> values = new ArrayList<>();
values.add(Value.newBuilder().setNullValue(NullValue.NULL_VALUE).build());
values.add(Value.newBuilder().setStringValue("blue-colar").build());
values.add(Value.newBuilder().setStringValue("married").build());
values.add(Value.newBuilder().setStringValue("primary").build());
values.add(Value.newBuilder().setStringValue("no").build());
values.add(Value.newBuilder().setNullValue(NullValue.NULL_VALUE).build());
values.add(Value.newBuilder().setStringValue("yes").build());
values.add(Value.newBuilder().setStringValue("yes").build());
values.add(Value.newBuilder().setStringValue("cellular").build());
values.add(Value.newBuilder().setNullValue(NullValue.NULL_VALUE).build());
values.add(Value.newBuilder().setNullValue(NullValue.NULL_VALUE).build());
values.add(Value.newBuilder().setNullValue(NullValue.NULL_VALUE).build());
values.add(Value.newBuilder().setNullValue(NullValue.NULL_VALUE).build());
values.add(Value.newBuilder().setNullValue(NullValue.NULL_VALUE).build());
values.add(Value.newBuilder().setNullValue(NullValue.NULL_VALUE).build());
values.add(Value.newBuilder().setStringValue("unknown").build());
predict(projectId, modelId, values);
}
static void predict(String projectId, String modelId, List<Value> values) throws IOException {
// Initialize client that will be used to send requests. This client only needs to be created
// once, and can be reused for multiple requests. After completing all of your requests, call
// the "close" method on the client to safely clean up any remaining background resources.
try (PredictionServiceClient client = PredictionServiceClient.create()) {
// Get the full path of the model.
ModelName name = ModelName.of(projectId, "us-central1", modelId);
Row row = Row.newBuilder().addAllValues(values).build();
ExamplePayload payload = ExamplePayload.newBuilder().setRow(row).build();
// Feature importance gives you visibility into how the features in a specific prediction
// request informed the resulting prediction. For more info, see:
// https://cloud.google.com/automl-tables/docs/features#local
PredictRequest request =
PredictRequest.newBuilder()
.setName(name.toString())
.setPayload(payload)
.putParams("feature_importance", "true")
.build();
PredictResponse response = client.predict(request);
System.out.println("Prediction results:");
for (AnnotationPayload annotationPayload : response.getPayloadList()) {
TablesAnnotation tablesAnnotation = annotationPayload.getTables();
System.out.format(
"Classification label: %s%n", tablesAnnotation.getValue().getStringValue());
System.out.format("Classification score: %.3f%n", tablesAnnotation.getScore());
// Get features of top importance
tablesAnnotation
.getTablesModelColumnInfoList()
.forEach(
info ->
System.out.format(
"\tColumn: %s - Importance: %.2f%n",
info.getColumnDisplayName(), info.getFeatureImportance()));
}
}
}
}
For testing purposes I used Google's test dataset (gs://cloud-ml-tables-data/bank-marketing.csv) and used the code above to run send prediction.
See test prediction:

How to search a file for a certain date and time (inputted from user) in java

I am trying to figure out how I would go about searching a .txt file for a certain date and time that is given by the user. Currently my code does this:
PRINT "Enter the date of the task: "
READ into task_date (string)
PRINT "Enter the time of the task: "
READ into task_time (string)
PRINT "Enter the name of the task: "
READ into task_name (string)
LOAD tasks.txt file
I want to be able to read the data from the user in those three steps (yes i know it would probably be better to do it in one step but this is more of a proof of concept to a friend), then search a the tasks.txt file for a space to insert the task_date + task_time + task_name. Any help would be appreciated. Thanks
Edit:
Ok, I am creating a calendar app that is currently terminal based.
What it does is it takes the user inputs task date/time/name and appends it in the correct position in a file called tasks.txt (the file example is below)
10-6-2020 6:30 am Wake up
10-6-2020 7:00 am Take mom to school
10-6-2020 7:30 am arrive back home
10-6-2020 8:30 am leave for class
10-6-2020 9:00 am arrive on campus
10-6-2020 12:00 pm leave campus
10-6-2020 12:30 pm arrive back home
10-6-2020 1:00 pm Meeting with advisors
So lets say the user inputs '10-06-2020 10:00 am Walk into class'
I want the code to insert that line between 9:00 am and 12:00 pm
I apologize if the first question i posted was incomplete.
Edit 2:
My question isn't for others to code for me. My question is can anyone point me in the direction of how to append a string in the correct position of the txt file. (If you're confused look above). Again I'm not asking anyone to code it for me.
System.out.print("Enter the date of the task: ");
// // STRING task_time = INPUT
task_date = scan.nextLine();
// // PRINT "Enter the name of the task: "
System.out.print("Enter the time of the task: ");
// // STRING task_name = INPUT
String task_time = scan.nextLine();
// // CREATE new_task = task_date + task_time + task_name (STRING)
// String new_task = task_date;
System.out.print("Enter the name of the task: ");
// STRING task_date = INPUT
String task_name = scan.nextLine();
String task = task_date + " " + task_time + " " + task_name;
System.out.println(task);
// LOADFILE tasks.txt
String search_date = task_date;
String search_time = task_time;
int lineNumber = 0;
File taskstxt = new File("tasks.txt");
Scanner filereader = new Scanner(taskstxt);
// SEARCH tasks.txt for corresponding date and time
while (filereader.hasNextLine()) {
final String lineFromFile = filereader.nextLine();
if (lineFromFile.contains(search_date)) {
}
}
above is the code snippet in question. I want to search the txt file for for the date and time inputted by the user, and if it exists print "you have a task for that time already", if it doesn't exist I want to append the file with the task date/time/name. I'm sorry if this is confusing for anyone (I find it hard sometimes to write out exactly what I'm thinking)

Q: How do a build a "Calendar app" in Java?
A: Per your design above, your app will have the following:
A UI for adding records (currently command line, but you might want to consider a web UI, Android, Swing or other alternatives)
A UI for displaying records
A data store for saving records (currently a text file, but you might want to consider a "structured text" format like JSON or XML, or a database).
Q: How do I save a new calendar record in the correct position?
A: I would suggest:
Write a "TaskList" class for holding your calendar records.
SIMPLE EXAMPLE:
public class TaskList {
public List<TaskRecord> tasks;
public void save(string filename) { ... }
public void load(string filename) { ... }
}
Write a "TaskRecord" class for individual tasks:
SIMPLE EXAMPLE:
public class TaskRecord {
public Date dateTime;
public String taskText;
}
It's important to keep the "date" separate from your "text" in your class.
If you want a simple text file, and you want everything on the same line, then choose a delimiter that makes it easy to parse. For example, you can separate "date" and "time" with a tab (\t):
10-6-2020 6:30 am\tWake up
It might be unimportant to "insert the record in the right place" until you're ready to "save" the updated file. You can simply "sort()" (by date/time) before you "write()":
SIMPLE EXAMPLE:
public class TaskRecord implements Comparator<Date> {
public Date dateTime;
public String taskText;
#Override
public int compare(TaskRecord a, TaskRecord b) {
return a.datetime.compareTo(b.datetime);
}
}
If you really wanted to sort each new record as you insert it, you'd still probably want to implement "Comparator" (as above). You'd loop through your list until you find a time/date >= your new date, then List.add() at that index.
You'd probably also want to add methods to your "TaskList" class to add, modify and/or delete records.
"Encapsulation" can make your classes more robust. You want to hide everything about the class that's not "essential" from users of that class
SIMPLE EXAMPLE:
public class TaskRecord implements Comparator<Date> {
private Date dateTime;
private String taskText;
// Initialize object state in constructor
public TaskRecord(Date dateTime, String taskText) {
this.dateTime = dateTime;
this.taskText = taskText;
}
// "Getter" methods for read-only access
Date getDateTime() { return dateTime; }
String getTaskText() { return taskText; }
#Override
public int compare(TaskRecord a, TaskRecord b) {
return a.datetime.compareTo(b.datetime);
}
}
'Hope that helps ... at least a little

Connect To MongoDB using Apache Mahout

I'm trying to generate recommendations using Apache Mahout while using MongoDB to create the datamodel as per the MongoDBDataModel. My code is as follows :
import java.net.UnknownHostException;
import java.util.List;
import org.apache.mahout.cf.taste.common.TasteException;
import org.apache.mahout.cf.taste.impl.model.mongodb.MongoDBDataModel;
import org.apache.mahout.cf.taste.impl.neighborhood.ThresholdUserNeighborhood;
import org.apache.mahout.cf.taste.impl.recommender.GenericItemBasedRecommender;
import org.apache.mahout.cf.taste.impl.recommender.GenericUserBasedRecommender;
import org.apache.mahout.cf.taste.impl.similarity.PearsonCorrelationSimilarity;
import org.apache.mahout.cf.taste.neighborhood.UserNeighborhood;
import org.apache.mahout.cf.taste.recommender.RecommendedItem;
import org.apache.mahout.cf.taste.recommender.UserBasedRecommender;
import org.apache.mahout.cf.taste.similarity.ItemSimilarity;
import org.apache.mahout.cf.taste.similarity.UserSimilarity;
import com.mongodb.MongoException;
public class usingMongo {
public static void main(String[] args) throws UnknownHostException, Mong oException
,TasteException {
final long startTime = System.nanoTime();
MongoDBDataModel model = new MongoDBDataModel("AdamsLaptop", 27017,
"test", "ratings100k", false, false, null);
System.out.println("connected to mongo ");
UserSimilarity UserSim = new PearsonCorrelationSimilarity(model);
UserNeighborhood neighborhood = new ThresholdUserNeighborhood(0.5, UserSim, model);
UserBasedRecommender UserRecommender = new GenericUserBasedRecommender(model, neighborhood, UserSim);
List<RecommendedItem>UserRecommendations = UserRecommender.recommend(1, 3);
for (RecommendedItem recommendation : UserRecommendations) {
System.out.println("You may like movie " + recommendation.getItemID() + " as a user similar to you also rated it " + recommendation.getValue() + " USER");
}
ItemSimilarity ItemSim = new PearsonCorrelationSimilarity(model);//LogLikelihoodSimilarity(model);
GenericItemBasedRecommender ItemRecommender = new GenericItemBasedRecommender(model, ItemSim);
List<RecommendedItem>ItemRecommendations = ItemRecommender.recommend(1, 3);
for (RecommendedItem recommendation : ItemRecommendations) {
System.out.println("You may like movie " + recommendation.getItemID() + " as a user similar to you also rated it " + recommendation.getValue() + " ITEM");
}
final long duration = System.nanoTime() - startTime;
System.out.println(duration);
}
}
I cant see where I've gone wrong but with numerous changes and lots of trial and error the error message remains the same :
Exception in thread "main" java.lang.NullPointerException
at org.apache.mahout.cf.taste.impl.model.mongodb.MongoDBDataModel.getID(MongoDBDataModel.java:743)
at org.apache.mahout.cf.taste.impl.model.mongodb.MongoDBDataModel.buildModel(MongoDBDataModel.java:570)
at org.apache.mahout.cf.taste.impl.model.mongodb.MongoDBDataModel.<init>(MongoDBDataModel.java:245)
at recommender.usingMongo.main(usingMongo.java:24)
Any suggestions? Here's an example of my data within MongoDB :
{ "_id" : ObjectId("56ddf61f5960960c333f3dcb"),"userId" : 1, "movieId" : 292, "rating" : 4, "timestamp" : 847116936 }

I succesfully integrated MongoDB data to mahout.
The structure of the data in mongoDB depends on the kind of Similarity algorithm you use.for eg,
UserSimilarity
MongoDBDataModel datamodel = new MongoDBDataModel("127.0.0.1", 27017, "testing", "ratings", true, true, null);
where the user_id, item_id are integer values, preference are float values and created_at as timestamp
SVDRecommender
the user_id, item_id are MongoDB Objects and preference are float values and created_at as timestamp
The obvious troubleshooting you can do is whether the MongoDB server is running or not. As per the exception it's running. I think the problem lies in your structure of data..
Use user_id instead of userId, item_id instead of itemId, preference instead of rating. I don't know if this will make any difference. I used one of the tutorial online, but can't find it at the moment.
It's working but too slow when I have more than 10000 users with 1000 items.

I think that the problem is that mahout assumes some default values when it comes to some fields that need to reside in your mongoDB the item ID, User ID and preferences that are user_id, item_id and preference so The solution might lie on using another MongoDBDataModel constructor that will give you the possibility to pass as parameters the names of those fields in your mongoDB instance or redesign your Collections Schema.
I hope that makes sense.

Text to Speech live Tweets using TTS.lib

I'm trying to get a specific user's tweets into Processing and then have them spoken out using the TTS Library. So far I've managed to get the tweets into Processing, with them printed as I want them. BUT, adding the TTS stuff is where it's proving problematic, considering my novice-level-skills.
What happens at the moment is that I receive the error message:
The method speak(String) in the type TTS is not applicable for the arguments (String[])
Anyone have any ideas? Help would be greatly appreciated. Thanks.
import twitter4j.util.*;
import twitter4j.*;
import twitter4j.management.*;
import twitter4j.api.*;
import twitter4j.conf.*;
import twitter4j.json.*;
import twitter4j.auth.*;
import guru.ttslib.*;
import java.util.*;
TTS tts;
tts = new TTS();
ConfigurationBuilder cb = new ConfigurationBuilder();
cb.setOAuthConsumerKey("XXXX");
cb.setOAuthConsumerSecret("XXXX");
cb.setOAuthAccessToken("XXXX");
cb.setOAuthAccessTokenSecret("XXXX");
java.util.List statuses = null;
Twitter twitter = new TwitterFactory(cb.build()).getInstance();
String userName ="#BBC";
int numTweets = 19;
String[] twArray = new String[numTweets];
try {
statuses = twitter.getUserTimeline(userName);
}
catch(TwitterException e) {
}
for (int i=0; i<statuses.size(); i++) {
Status status = (Status)statuses.get(i);
//println(status.getUser().getName() + ": " + status.getText());
twArray[i] = status.getUser().getName() + ": " + status.getText();
}
println(twArray);
tts.speak(twArray);

The error says it all: the tts.speak() function take a single String value, but you're giving it a String[] array.
In other words, you should only be passing in a single tweet at a time. Instead, you're passing in every tweet at once. The function doesn't know how to handle that, so you get the error.
You need to only pass in a single String value. How you do that depends on what exactly your goal is. You might just pass in the first tweet:
tts.speak(twArray[0]);
Or you might pass in each tweet one at a time:
for(String tweet : twArray){
tts.speak(tweet);
}