97 lines
2.6 KiB
Java
97 lines
2.6 KiB
Java
package com.baeldung.dddhexagonalspring.domain;
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import java.math.BigDecimal;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import java.util.Objects;
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import java.util.UUID;
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public class Order {
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private UUID id;
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private OrderStatus status;
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private List<OrderItem> orderItems;
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private BigDecimal price;
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public Order(final UUID id, final Product product) {
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this.id = id;
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this.orderItems = new ArrayList<>(Collections.singletonList(new OrderItem(product)));
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this.status = OrderStatus.CREATED;
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this.price = product.getPrice();
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}
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public void complete() {
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validateState();
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this.status = OrderStatus.COMPLETED;
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}
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public void addOrder(final Product product) {
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validateState();
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validateProduct(product);
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orderItems.add(new OrderItem(product));
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price = price.add(product.getPrice());
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}
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public void removeOrder(final UUID id) {
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validateState();
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final OrderItem orderItem = getOrderItem(id);
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orderItems.remove(orderItem);
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price = price.subtract(orderItem.getPrice());
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}
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private OrderItem getOrderItem(final UUID id) {
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return orderItems.stream()
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.filter(orderItem -> orderItem.getProductId()
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.equals(id))
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.findFirst()
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.orElseThrow(() -> new DomainException("Product with " + id + " doesn't exist."));
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}
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private void validateState() {
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if (OrderStatus.COMPLETED.equals(status)) {
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throw new DomainException("The order is in completed state.");
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}
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}
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private void validateProduct(final Product product) {
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if (product == null) {
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throw new DomainException("The product cannot be null.");
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}
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}
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public UUID getId() {
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return id;
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}
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public OrderStatus getStatus() {
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return status;
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}
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public BigDecimal getPrice() {
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return price;
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}
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public List<OrderItem> getOrderItems() {
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return Collections.unmodifiableList(orderItems);
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}
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@Override
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public int hashCode() {
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return Objects.hash(id, orderItems, price, status);
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj)
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return true;
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if (!(obj instanceof Order))
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return false;
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Order other = (Order) obj;
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return Objects.equals(id, other.id) && Objects.equals(orderItems, other.orderItems) && Objects.equals(price, other.price) && status == other.status;
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}
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private Order() {
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}
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}
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