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java pizza project #2 file repository & test
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105 changes: 105 additions & 0 deletions
105
...IT/Cohort42.1project/JavaPizzaMvn/src/main/java/pizza/repository/PizzaFileRepository.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| package pizza.repository; | ||
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| import pizza.domain.Pizza; | ||
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| import java.io.FileWriter; | ||
| import java.io.IOException; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.NoSuchFileException; | ||
| import java.nio.file.Paths; | ||
| import java.util.ArrayList; | ||
| import java.util.Collection; | ||
| import java.util.List; | ||
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| public class PizzaFileRepository implements CrudRepository<Integer, Pizza> { | ||
| private String fileName; | ||
| private final String SPLIT_CHAR = ";"; | ||
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| public PizzaFileRepository(String fileName) { | ||
| this.fileName = fileName; | ||
| } | ||
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| @Override | ||
| public Collection<Pizza> findAll() { | ||
| Collection<Pizza> pizzas = new ArrayList<>(); | ||
| try { | ||
| List<String> lines = Files.readAllLines(Paths.get(fileName)); | ||
| lines.forEach(str -> { | ||
| String[] fields = str.split(SPLIT_CHAR); | ||
| pizzas.add(new Pizza(Integer.valueOf(fields[0]), fields[1], fields[2], Integer.valueOf(fields[3]))); | ||
| }); | ||
| } catch (NoSuchFileException e) { | ||
| // if file not found - return empty list | ||
| } catch (IOException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| return pizzas; | ||
| } | ||
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| @Override | ||
| public Pizza findById(Integer id) { | ||
| Collection<Pizza> pizzas = findAll(); | ||
| for (Pizza pizza : pizzas) { | ||
| if (pizza.getId() == id) { | ||
| return pizza; | ||
| } | ||
| } | ||
| return null; | ||
| } | ||
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| @Override | ||
| public void save(Pizza pizza) { | ||
| // read all records from file | ||
| Collection<Pizza> pizzas = findAll(); | ||
| if (pizza.getId() == null) { | ||
| // add record and generate id | ||
| int id = 0; | ||
| for (Pizza p : pizzas) { // TODO optimization | ||
| if (id < p.getId()) { | ||
| id = p.getId(); | ||
| } | ||
| } | ||
| pizza.setId(id + 1); | ||
| pizzas.add(pizza); | ||
| } else { | ||
| // update record | ||
| for (Pizza p : pizzas) { | ||
| if (p.getId() == pizza.getId()) { | ||
| p.update(pizza.getName(), pizza.getComposition(), pizza.getPrice()); | ||
| break; | ||
| } | ||
| } | ||
| } | ||
| // rewrite all records to file | ||
| rewiteFile(pizzas); | ||
| } | ||
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| @Override | ||
| public void remove(Integer id) { | ||
| Collection<Pizza> pizzas = findAll(); | ||
| Pizza deletedPizza = null; | ||
| for (Pizza pizza : pizzas) { | ||
| if (pizza.getId() == id) { | ||
| deletedPizza = pizza; | ||
| break; | ||
| } | ||
| } | ||
| // if pizza found by id | ||
| if (deletedPizza != null) { | ||
| pizzas.remove(deletedPizza); | ||
| // rewrite all records to file | ||
| rewiteFile(pizzas); | ||
| } | ||
| } | ||
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| private void rewiteFile(Collection<Pizza> pizzas) { | ||
| try (FileWriter writer = new FileWriter(fileName)) { // TODO Buffered | ||
| for (Pizza p : pizzas) { | ||
| String str = p.getId() + SPLIT_CHAR + p.getName() + SPLIT_CHAR + p.getComposition() + SPLIT_CHAR + p.getPrice(); | ||
| writer.write(str + "\n"); | ||
| } | ||
| } catch (IOException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
| } |
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36 changes: 36 additions & 0 deletions
36
BerlinAIT/Cohort42.1project/JavaPizzaMvn/src/test/java/pizza/PizzaServiceTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| package pizza; | ||
|
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| import org.junit.jupiter.api.Assertions; | ||
| import org.junit.jupiter.api.BeforeEach; | ||
| import org.junit.jupiter.api.Test; | ||
| import pizza.domain.Pizza; | ||
| import pizza.repository.CrudRepository; | ||
| import pizza.repository.PizzaFileRepository; | ||
| import pizza.service.PizzaService; | ||
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| import java.util.Collection; | ||
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| public class PizzaServiceTest { | ||
| final String PIZZA_FILE = "C:\\temp\\java_pizza_pizza_test.txt"; | ||
| CrudRepository<Integer, Pizza> pizzaRepository; | ||
| private PizzaService pizzaService; | ||
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| @BeforeEach | ||
| public void init() { | ||
| pizzaRepository = new PizzaFileRepository(PIZZA_FILE); | ||
| pizzaService = new PizzaService(pizzaRepository); | ||
| } | ||
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| @Test | ||
| public void testAdd() { | ||
| Collection<Pizza> pizzas = pizzaRepository.findAll(); | ||
| Assertions.assertEquals(0, pizzas.size()); | ||
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| pizzaService.add("Pizza", "Components...", 100); | ||
| pizzas = pizzaRepository.findAll(); | ||
| Assertions.assertEquals(1, pizzas.size()); | ||
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| Pizza pizza = pizzas.iterator().next(); | ||
| Assertions.assertEquals("Pizza", pizza.getName()); | ||
| } | ||
| } |