如何将控制器与表单集成（Hibernate Spring Vaadin）

Question

I'm busing developing an application (Hibernate Spring Vaadin Postgres Liferay). I did all of the configurations for the project (Hibernate, Spring, Postgres) and I generated a database, but when I do a dynamic formulaire I have a problem integrating the controller with the form.

This is the article.java:

 package com.bd.entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="Articlet")
public class Article {

    int id;
    String nom;
    String type;
    int qte;


    public Article() {
        super();
        // TODO Auto-generated constructor stub
    }
    @Id
    @GeneratedValue
     @Column(name="ID")
    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }
     @Column(name="Nom")
    public String getNom() {
        return nom;
    }
    public void setNom(String nom) {
        this.nom = nom;
    }
     @Column(name="Type")
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
     @Column(name="Qunatite")
    public int getQte() {
        return qte;
    }
    public void setQte(int qte) {
        this.qte = qte;
    }




}

This is articledaoimpl.java:

  package com.bd.dao;

import java.util.Collection;
import java.util.List;



import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import com.bd.entity.Article;
@Repository
@Configuration

@Transactional
public class ArticleDaoImp implements ArticleDao {

    @Autowired
    SessionFactory sessionFactory;

    @SuppressWarnings("unchecked")
    @Transactional(readOnly = true)
    public List<Article> getAll() {

        return sessionFactory.getCurrentSession().createQuery("from Article")
                .list();
    }

    @Transactional(readOnly = true)
    public Article getById(int articleId) {

        return (Article) sessionFactory.getCurrentSession().get(Article.class,
                articleId);
    }

    @Override
    public void save(Article article) {
        sessionFactory.getCurrentSession().merge(article);

    }

    @Override
    public void delete(Article article) {
        sessionFactory.getCurrentSession().delete(article);

    }

}

This is articleserviceimpl.java:

 package com.bd.service;

import java.util.Collection;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Service;

import com.bd.dao.ArticleDao;
import com.bd.entity.Article;

@Service
@Configuration
@ComponentScan("com.bd.dao")

public class ArticleServiceImp implements ArticleService {

    @Autowired
    private ArticleDao articledao;



    @Override
    public Article getArticleById(int articleId) {
        // TODO Auto-generated method stub
        return articledao.getById(articleId);
    }

    @Override
    public void saveArticle(Article article) {
        // TODO Auto-generated method stub
        articledao.save(article);

    }

    @Override
    public void deleteArticle(Article article) {
        // TODO Auto-generated method stub
        articledao.delete(article);
    }

    @Override
    public List<Article> getAllArticles() {
        // TODO Auto-generated method stub
        return articledao.getAll();
    }

}

This is the article controleur:

    package com.bd.controleur;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Controller;

import com.bd.entity.Article;
import com.bd.service.ArticleService;

@Controller
@Configuration
@ComponentScan("com.bd.service")

public class ArticleControleur {

    @Autowired
    ArticleService articleService;

    public void addarticle(Article  article){
        articleService.saveArticle(article);
    }
}

This the form:

    package achrefliferay;

import org.springframework.beans.factory.annotation.Autowired;

import com.bd.entity.Article;
import com.bd.service.ArticleService;
import com.vaadin.Application;
import com.vaadin.ui.Button;
import com.vaadin.ui.TextField;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;
import com.vaadin.ui.Button.ClickEvent;



public class AchrefliferayApplication extends Application {

    @Autowired
    ArticleService articleService;


    public void init() {
        Article article;

        Window w = new Window("Subscribe Newsletter");
        setMainWindow(w);
        w.setContent(new VerticalLayout());
        TextField name = new TextField("Name");
        TextField type = new TextField("Type");
        TextField qte = new TextField("Quantité");
        Button subscribeBtn = new Button("saisi");
        w.addComponent(name);
        w.addComponent(type);
        w.addComponent(qte);
        w.addComponent(subscribeBtn);

        subscribeBtn.addListener(new Button.ClickListener() {

            @Override
            public void buttonClick(ClickEvent event) {

            articleService.saveArticle();   
            }
        });
    }

}

Answer 1

You'll have to create a BeanItem and set it as the data source for your form. I don't know Spring that well, but once you know how to bind a bean to the form, you should be able to integrate the controller with the form by using the appropriate listeners.

Example:

// Create a form and use FormLayout as its layout. 
final Form form = new Form();

// Set form caption text
form.setCaption("Subscribe Newsletter");

// Create a bean item that is bound to the bean. 
final BeanItem item = new BeanItem(new Article());

// Bind the bean item as the data source for the form. 
form.setItemDataSource(item);

// Add the subscribe button
HorizontalLayout formFooter = new HorizontalLayout();
Button subscribeButton = new Button("saisi");
subscribeButton.addListener(new Button.ClickListener() {
    void buttonClick(Button.ClickEvent event) {
        form.commit();
        controller.addArticle(item.getBean());
    }
});
formFooter.addComponent(subscribeButton);
form.setFooter(formFooter);

This means you don't have to explicitly create every form field like you did in your AchrefliferayApplication 's init() method.

See Binding Form to Data in Book of Vaadin.

ps. If anyone actual Vaadin expert reads this: feel free to correct my answer to follow the best practices :)