How to set a Spinner value to an object

Question

I have the following table:

<p:dataTable id="tabelaDisciplinasSelelecionadas" var="disciplina" value="#{disciplinaBean.droppedDisciplinas}"
                                        rendered="#{not empty disciplinaBean.droppedDisciplinas}">

    <p:column headerText="Id">
        <h:outputText value="#{disciplina.idDisciplina}" />
    </p:column>

    <p:column headerText="Nome">
        <h:outputText value="#{disciplina.nomeDisciplina}"/>
    </p:column>

    <p:column headerText="Código">
        <h:outputText value="#{disciplina.codigoDisciplina}" />
    </p:column>

    <p:column headerText="Vagas">
        <h:outputLabel for="vagas" value="Vagas: " />
            <p:spinner id="vagas" value="#{editalDisciplinaBean.editalDisciplina.vagas}"  />
    </p:column>


    <p:column style="width:32px">
        <p:commandButton update=":formDisciplina:display" oncomplete="PF('disciplinaDialog').show()" icon="ui-icon-search">
            <f:setPropertyActionListener value="#{disciplina}"  target="#{disciplinaBean.disciplinaSelecionada}" />
                </p:commandButton>
            </p:column>

</p:dataTable>

Editaldisciplinabean.java

ManagedBean(name="editalDisciplinaBean")
@SessionScoped

public class EditalDisciplinaBean {

    private EditalDisciplina editalDisciplina;
    private EditalDisciplinaDAO editalDisciplinaDAO = new EditalDisciplinaDAO();
    private List<EditalDisciplina> lista;
    private List<EditalDisciplina> listaFiltro;

    private Edital edital;
    private Disciplina disciplina;

    public EditalDisciplina getEditalDisciplina() {
        if (editalDisciplina == null)
            editalDisciplina = new EditalDisciplina();
        return editalDisciplina;
    }

    public void setEditalDisciplina(EditalDisciplina editalDisciplina) {
        this.editalDisciplina = editalDisciplina;
    }

    public EditalDisciplinaDAO getDisciplinaDAO() {
        return editalDisciplinaDAO;
    }

    public void setDisciplinaDAO(EditalDisciplinaDAO disciplinaDAO) {
        this.editalDisciplinaDAO = disciplinaDAO;
    }

    public List<EditalDisciplina> getLista() {
        if (lista == null)
            lista = editalDisciplinaDAO.getListaEditalDisciplina();
        return lista;
    }

    public void setLista(List<EditalDisciplina> lista) {
        this.lista = lista;
    }

    public List<EditalDisciplina> getListaFiltro() {
        return listaFiltro;
    }

    public void setListaFiltro(List<EditalDisciplina> listaFiltro) {
        this.listaFiltro = listaFiltro;
    }

    public Edital getEdital() {
        return edital;
    }

    public void setEdital(Edital edital) {
        this.edital = edital;
    }

    public EditalDisciplinaDAO getEditalDisciplinaDAO() {
        return editalDisciplinaDAO;
    }

    public void setEditalDisciplinaDAO(EditalDisciplinaDAO editalDisciplinaDAO) {
        this.editalDisciplinaDAO = editalDisciplinaDAO;
    }

    public Disciplina getDisciplina() {
        return disciplina;
    }

    public void setDisciplina(Disciplina disciplina) {
        this.disciplina = disciplina;
    }

}

Vacancies is an attribute of my entity Editaldisciplina (which is a many relationship table for many of Notice and Discipline). So for each row of the table there is a Spinner for me to enter as many vacancies for that discipline, but it turns out that the vacancies are not in the discipline, so I can’t use the datatable variable, so when I give the Submit all Editaldiscipline objects get the same number of vacancies. How do I for each Editaldisciplina have their number of vacancies?

Answer 1

You can have a method that receives parameters in your bean instead of using property as you are doing.

Then the method would look for the number according to the dysline passed by parameter.

The code would look something like this:

<p:column headerText="Vagas">
    <h:outputLabel for="vagas" value="Vagas: " />
        <p:spinner id="vagas" value="#{editalDisciplinaBean.vagasPorDisciplina(idDisciplina)}"  />
</p:column>

The method can also receive the displin itself as a parameter:

<p:column headerText="Vagas">
    <h:outputLabel for="vagas" value="Vagas: " />
        <p:spinner id="vagas" value="#{editalDisciplinaBean.vagasPorDisciplina(disciplina)}"  />
</p:column>

I calculate that currently editalDisciplinaBean contains an instance of a EditalDisciplina. Instead, it would not have any instance of Editaldiscipline but rather search for this instance according to the parameter passed.

If the id of the dysline was passed, it would be something like this:

public int vagasPorDisciplina(int idDisciplina) {
    return entityManager.find(EditalDisciplina.class, idDisciplina).getSingleResult().getVagas();
}