br.com.alura.casadocodigo.models.CarrinhoCompras.java Source code

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Here is the source code for br.com.alura.casadocodigo.models.CarrinhoCompras.java

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package br.com.alura.casadocodigo.models;

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Objects;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
import org.springframework.web.context.WebApplicationContext;

/**
 *
 * @author Michel A. Medeiros
 */
@Component
@Scope(value = WebApplicationContext.SCOPE_SESSION)
public class CarrinhoCompras {

    private final Map<CarrinhoItem, Integer> itens = new LinkedHashMap<>();

    public void add(CarrinhoItem item) {
        itens.put(item, getQuantidade(item) + 1);
    }

    private int getQuantidade(CarrinhoItem item) {
        if (!itens.containsKey(item)) {
            itens.put(item, 0);
        }
        return itens.get(item);
    }

    public int getQuantidade() {
        return itens.values().stream().reduce(0, (proximo, accumulator) -> proximo + accumulator);
    }

    @Override
    public int hashCode() {
        int hash = 5;
        hash = 13 * hash + Objects.hashCode(this.itens);
        return hash;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final CarrinhoCompras other = (CarrinhoCompras) obj;
        if (!Objects.equals(this.itens, other.itens)) {
            return false;
        }
        return true;
    }

}