// Path: example-app/example-app-backend/src/main/java/com/github/mcollovati/vaadin/exampleapp/samples/backend/DataService.java
// public abstract class DataService implements Serializable {
// 
//     public abstract Collection<Product> getAllProducts();
// 
//     public abstract Collection<Category> getAllCategories();
// 
//     public abstract void updateProduct(Product p);
// 
//     public abstract void deleteProduct(int productId);
// 
//     public abstract Product getProductById(int productId);
// 
//     public static DataService get() {
//         return MockDataService.getInstance();
//     }
// 
// }
// 
// Path: example-app/example-app-backend/src/main/java/com/github/mcollovati/vaadin/exampleapp/samples/backend/data/Product.java
// public class Product implements Serializable {
// 
//     @NotNull
//     private int id = -1;
//     @NotNull
//     @Size(min = 2, message = "Product name must have at least two characters")
//     private String productName = "";
//     @Min(0)
//     private BigDecimal price = BigDecimal.ZERO;
//     private Set<Category> category;
//     @Min(value = 0, message = "Can't have negative amount in stock")
//     private int stockCount = 0;
//     @NotNull
//     private Availability availability = Availability.COMING;
// 
//     public int getId() {
//         return id;
//     }
// 
//     public void setId(int id) {
//         this.id = id;
//     }
// 
//     public String getProductName() {
//         return productName;
//     }
// 
//     public void setProductName(String productName) {
//         this.productName = productName;
//     }
// 
//     public BigDecimal getPrice() {
//         return price;
//     }
// 
//     public void setPrice(BigDecimal price) {
//         this.price = price;
//     }
// 
//     public Set<Category> getCategory() {
//         return category;
//     }
// 
//     public void setCategory(Set<Category> category) {
//         this.category = category;
//     }
// 
//     public int getStockCount() {
//         return stockCount;
//     }
// 
//     public void setStockCount(int stockCount) {
//         this.stockCount = stockCount;
//     }
// 
//     public Availability getAvailability() {
//         return availability;
//     }
// 
//     public void setAvailability(Availability availability) {
//         this.availability = availability;
//     }
// 
// }


import java.util.Locale;
import java.util.Objects;
import java.util.function.Supplier;
import java.util.stream.Stream;
import com.github.mcollovati.vaadin.exampleapp.samples.backend.DataService;
import com.github.mcollovati.vaadin.exampleapp.samples.backend.data.Product;
import com.vaadin.data.provider.AbstractDataProvider;
import com.vaadin.data.provider.Query;
package com.github.mcollovati.vaadin.exampleapp.samples.crud;




public class ProductDataProvider
        extends AbstractDataProvider<Product, String> {
    
    /** Text filter that can be changed separately. */
    private String filterText = "";

    /**
     * Store given product to the backing data service.
     * 
     * @param product
     *            the updated or new product
     */
    public void save(Product product) {
        boolean newProduct = product.getId() == -1;
        
// Path: example-app/example-app-backend/src/main/java/com/github/mcollovati/vaadin/exampleapp/samples/backend/DataService.java
// public abstract class DataService implements Serializable {
// 
//     public abstract Collection<Product> getAllProducts();
// 
//     public abstract Collection<Category> getAllCategories();
// 
//     public abstract void updateProduct(Product p);
// 
//     public abstract void deleteProduct(int productId);
// 
//     public abstract Product getProductById(int productId);
// 
//     public static DataService get() {
//         return MockDataService.getInstance();
//     }
// 
// }
// 
// Path: example-app/example-app-backend/src/main/java/com/github/mcollovati/vaadin/exampleapp/samples/backend/data/Product.java
// public class Product implements Serializable {
// 
//     @NotNull
//     private int id = -1;
//     @NotNull
//     @Size(min = 2, message = "Product name must have at least two characters")
//     private String productName = "";
//     @Min(0)
//     private BigDecimal price = BigDecimal.ZERO;
//     private Set<Category> category;
//     @Min(value = 0, message = "Can't have negative amount in stock")
//     private int stockCount = 0;
//     @NotNull
//     private Availability availability = Availability.COMING;
// 
//     public int getId() {
//         return id;
//     }
// 
//     public void setId(int id) {
//         this.id = id;
//     }
// 
//     public String getProductName() {
//         return productName;
//     }
// 
//     public void setProductName(String productName) {
//         this.productName = productName;
//     }
// 
//     public BigDecimal getPrice() {
//         return price;
//     }
// 
//     public void setPrice(BigDecimal price) {
//         this.price = price;
//     }
// 
//     public Set<Category> getCategory() {
//         return category;
//     }
// 
//     public void setCategory(Set<Category> category) {
//         this.category = category;
//     }
// 
//     public int getStockCount() {
//         return stockCount;
//     }
// 
//     public void setStockCount(int stockCount) {
//         this.stockCount = stockCount;
//     }
// 
//     public Availability getAvailability() {
//         return availability;
//     }
// 
//     public void setAvailability(Availability availability) {
//         this.availability = availability;
//     }
// 
// }


// Path: example-app/example-app-ui/src/main/java/com/github/mcollovati/vaadin/exampleapp/samples/crud/ProductDataProvider.java
import java.util.Locale;
import java.util.Objects;
import java.util.function.Supplier;
import java.util.stream.Stream;
import com.github.mcollovati.vaadin.exampleapp.samples.backend.DataService;
import com.github.mcollovati.vaadin.exampleapp.samples.backend.data.Product;
import com.vaadin.data.provider.AbstractDataProvider;
import com.vaadin.data.provider.Query;

package com.github.mcollovati.vaadin.exampleapp.samples.crud;




public class ProductDataProvider
        extends AbstractDataProvider<Product, String> {
    
    /** Text filter that can be changed separately. */
    private String filterText = "";

    /**
     * Store given product to the backing data service.
     * 
     * @param product
     *            the updated or new product
     */
    public void save(Product product) {
        boolean newProduct = product.getId() == -1;
        
        DataService.get().updateProduct(product);