org.hbrs.nosql.mongoweb.gui.views.UseCase8.java Source code

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Here is the source code for org.hbrs.nosql.mongoweb.gui.views.UseCase8.java

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package org.hbrs.nosql.mongoweb.gui.views;

import com.mongodb.AggregationOutput;
import com.mongodb.DBObject;
import com.vaadin.ui.Button;
import com.vaadin.ui.Label;
import com.vaadin.ui.TextField;
import com.vaadin.ui.VerticalLayout;
import org.hbrs.nosql.mongoweb.db.MongoDBConnector;
import org.hbrs.nosql.mongoweb.model.UseCase;

import java.time.Duration;
import java.time.LocalTime;

/**
 * @author Franz
 */
public class UseCase8 extends AbstractUseCase {
    @Override
    protected void setUp() {
        //Add your Vaadin Coding here ;)
        //MongoDB Connector
        MongoDBConnector mongo = new MongoDBConnector();

        VerticalLayout uc8 = new VerticalLayout();

        Label uc8label = new Label("Welche Professoren haben wieviele Arbeiten zu einem Thema betreut?");

        TextField uc8input = new TextField();
        uc8input.setCaption("Thema:");

        Button button = new Button("Suche");

        button.addClickListener(e -> {
            uc8.removeAllComponents();

            LocalTime t1 = LocalTime.now();

            // load list with values
            AggregationOutput uc8answer = mongo.getQuery8(uc8input.getValue());

            LocalTime t2 = LocalTime.now();
            Duration elapsed = Duration.between(t1, t2);

            // query over list
            for (DBObject place : uc8answer.results()) {
                if (!place.get("_id").equals("")) {
                    uc8.addComponent(new Label(place.get("_id") + ": " + place.get("Anzahl")));
                }
            }

            uc8.addComponent(new Label("Time: " + elapsed));

            addComponent(uc8);
        });

        addComponents(uc8label, uc8input, button);
        setMargin(true);
        setSpacing(true);
    }

    @Override
    protected UseCase getUseCase() {
        return (UseCase.UC8);
    }
}