org.hbrs.nosql.mongoweb.gui.views.UseCase3.java Source code

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Here is the source code for org.hbrs.nosql.mongoweb.gui.views.UseCase3.java

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

import com.vaadin.ui.Button;
import com.vaadin.ui.Label;
import com.vaadin.ui.TextField;
import com.vaadin.ui.VerticalLayout;

import java.time.Duration;
import java.time.LocalTime;
import java.util.List;

import org.hbrs.nosql.mongoweb.db.MongoDBConnector;
import org.hbrs.nosql.mongoweb.model.UseCase;

/**
 * @author Franz
 */
public class UseCase3 extends AbstractUseCase {
    @Override
    protected void setUp() {
        //Add your Vaadin Coding here ;)
        //MongoDB Connector
        MongoDBConnector mongo = new MongoDBConnector();

        VerticalLayout uc3 = new VerticalLayout();

        TextField uc3input = new TextField();

        uc3input.setCaption("Geben Sie einen Professor ein und sehen Sie welche Themen dieser untersttzt hat!");

        Button button = new Button("Suche");

        button.addClickListener(e -> {
            uc3.removeAllComponents();

            LocalTime t1 = LocalTime.now();

            // load list with values
            List uc3answer = mongo.getQuery3(uc3input.getValue());

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

            // query over list
            for (int i = 0; i < uc3answer.size(); i++) {
                //create and post labels for list elements
                uc3.addComponent(new Label((String) uc3answer.get(i)));
            }

            uc3.addComponent(new Label("Time: " + elapsed));

            addComponent(uc3);
        });
        addComponents(uc3input, button);
        setMargin(true);
        setSpacing(true);
    }

    @Override
    protected UseCase getUseCase() {
        return (UseCase.UC3);
    }
}