bai tap 1

local.properties

@@ -0,0 +1,8 @@
+## This file must *NOT* be checked into Version Control Systems,
+# as it contains information specific to your local configuration.
+#
+# Location of the SDK. This is only used by Gradle.
+# For customization when using a Version Control System, please read the
+# header note.
+#Wed Nov 06 11:04:08 ICT 2024
+sdk.dir=C\:\\Users\\nang2\\AppData\\Local\\Android\\Sdk

src/main/java/com/rxmobileteam/lecture1/data/ProductDao.java

@@ -1,7 +1,9 @@
 package com.rxmobileteam.lecture1.data;
 
+
 import com.rxmobileteam.lecture1.service.Product;
 import com.rxmobileteam.utils.ExerciseNotCompletedException;
+
 import org.jetbrains.annotations.NotNull;
 
 import java.util.HashSet;
@@ -11,10 +13,10 @@
  * {@link ProductDao} represents a Data Access Object (DAO) for products.
  * The implementation is simplified, so it just uses {@link HashSet} to store.
  * <p>
- * todo: 1. Implement a method {@link ProductDao#add(Product)} that store new product into the set
+ * todo: 1. Implement a method {@link ProductDao#addProduct(Product)} that store new product into the set
  * todo: 2. Implement a method {@link ProductDao#findAll()} that returns a set of all products
  */
-public class ProductDao {
+public class ProductDao implements ProductInterface {
     private final Set<Product> products = new HashSet<>();
 
     /**
@@ -23,9 +25,12 @@ public class ProductDao {
      * @param product a product to store
      * @return {@code true} if a product was stored, {@code false} otherwise
      */
-    public boolean add(@NotNull Product product) {
-        // TODO: implement this method
-        throw new ExerciseNotCompletedException();
+    public boolean addProduct(@NotNull Product product) {
+        boolean isCheck = products.add(product);
+        if (!isCheck) {
+            throw new ExerciseNotCompletedException();
+        }
+        return isCheck;
     }
 
     /**
@@ -35,8 +40,11 @@ public boolean add(@NotNull Product product) {
      */
     @NotNull
     public Set<Product> findAll() {
-        // TODO: implement this method
-        throw new ExerciseNotCompletedException();
+        if (products.isEmpty()){
+            throw new ExerciseNotCompletedException();
+        }
+        return products;
+
     }
 
 }

src/main/java/com/rxmobileteam/lecture1/data/ProductInterface.java

@@ -0,0 +1,11 @@
+package com.rxmobileteam.lecture1.data;
+
+import com.rxmobileteam.lecture1.service.Product;
+
+import java.util.Set;
+
+
+public interface ProductInterface {
+    boolean addProduct(Product product);
+    Set<Product> findAll();
+}

src/main/java/com/rxmobileteam/lecture1/factory/ProductServiceFactory.java

@@ -1,13 +1,14 @@
 package com.rxmobileteam.lecture1.factory;
 
+
+import com.rxmobileteam.lecture1.data.ProductDao;
+import com.rxmobileteam.lecture1.data.ProductInterface;
 import com.rxmobileteam.lecture1.service.ProductService;
-import com.rxmobileteam.utils.ExerciseNotCompletedException;
+
 import org.jetbrains.annotations.NotNull;
 
 /**
  * {@link ProductServiceFactory} is used to create an instance of {@link ProductService}
- * <p>
- * TODO: 1. Implement method {@link ProductServiceFactory#createProductService()}
  */
 public class ProductServiceFactory {
 
@@ -18,7 +19,7 @@ public class ProductServiceFactory {
      */
     @NotNull
     public ProductService createProductService() {
-        // TODO: implement this method
-        throw new ExerciseNotCompletedException();
+        ProductInterface productDao = new ProductDao();
+        return new ProductService(productDao);
     }
 }

src/main/java/com/rxmobileteam/lecture1/service/Product.java

@@ -1,5 +1,6 @@
 package com.rxmobileteam.lecture1.service;
 
+
 import org.jetbrains.annotations.NotNull;
 
 public class Product {
@@ -23,6 +24,25 @@ public Product(
         this.price = price;
     }
 
+    @NotNull
+    public String getId() {
+        return id;
+    }
+
+    @NotNull
+    public String getName() {
+        return name;
+    }
+
+    @NotNull
+    public String getDescription() {
+        return description;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;

src/main/java/com/rxmobileteam/lecture1/service/ProductService.java

@@ -1,39 +1,45 @@
 package com.rxmobileteam.lecture1.service;
 
-import com.rxmobileteam.lecture1.data.ProductDao;
-import com.rxmobileteam.utils.ExerciseNotCompletedException;
+import com.rxmobileteam.lecture1.data.ProductInterface;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 /**
  * {@link ProductService} provides an API that allows to manage {@link Product}s.
  * <p>
- * TODO: 1. Using {@link ProductDao} implement method {@link ProductService#addProduct(Product)}}
- * TODO: 2. Using {@link ProductDao} implement method {@link ProductService#searchProducts(String)}
+ * TODO: 1. Using {@link ProductInterface} implement method {@link ProductService#addProduct(Product)}}
+ * TODO: 2. Using {@link ProductInterface} implement method {@link ProductService#searchProducts(String)}
  */
+
 public class ProductService {
 
+    private final ProductInterface productDao;
+
+    public ProductService(ProductInterface productDao) {
+        this.productDao = productDao;
+    }
+
     /**
      * Adds a new product to the system.
      *
      * @param product a product to add
      * @return {@code true} if a product was added, {@code false} otherwise.
      */
     public boolean addProduct(@NotNull Product product) {
-        // TODO: implement this method
-        throw new ExerciseNotCompletedException();
+        return productDao.addProduct(product);
     }
 
     /**
-     * Returns all products that contains the given query in the name or description.
+     * Returns all products that contain the given query in the name or description.
      *
      * @param query a search query
      * @return a list of found products
      */
     @NotNull
     public List<Product> searchProducts(@NotNull String query) {
-        // TODO: implement this method
-        throw new ExerciseNotCompletedException();
+        return productDao.findAll().stream()
+                .filter(product -> product.getName().contains(query) || product.getDescription().contains(query))
+                .toList();
     }
 }