JSF SelectMany tag

<h:column>
                    <h:outputText value="Vendedores:"/>

                    <h:selectManyMenu
                        id="vendedores"
                        value="#{viewSeparacaoSinteticoRelatorioController.vendedorChoices}">
                        <f:selectItems
                            value="#{viewSeparacaoSinteticoRelatorioController.vendedorSelects}"/>
                    </h:selectManyMenu>


               </h:column>

package controller;

import java.util.ArrayList;
import java.util.List;
import javax.annotation.Resource;
import javax.faces.model.SelectItem;
import org.springframework.stereotype.Controller;
import org.springframework.context.annotation.Scope;
import service.ViewSeparacaoSinteticoRelatorioService;

@Controller("viewSeparacaoSinteticoRelatorioController")
@Scope("session")
public class ViewSeparacaoSinteticoRelatorioController {

    @Resource
    private ViewSeparacaoSinteticoRelatorioService vssrs;

    public ViewSeparacaoSinteticoRelatorioService getVssrs() {
        return vssrs;
    }

    public void setVssrs(ViewSeparacaoSinteticoRelatorioService vssrs) {
        this.vssrs = vssrs;
    }
    private List vendedorChoices = new ArrayList();

    public List getVendedorChoices() {
        return vendedorChoices;
    }

    public void setVendedorChoices(List vendedorChoices) {
        this.vendedorChoices = vendedorChoices;
    }
    private SelectItem[] vendedorSelects;

    public SelectItem[] getVendedorSelects() {
        return vendedorSelects;
    }

    public void setVendedorSelects(SelectItem[] vendedorSelects) {
        this.vendedorSelects = vendedorSelects;
    }

    public ViewSeparacaoSinteticoRelatorioController() {


        this.fillSelectItemsVendedor();


    }
    private String formatoChoice;
    private Object formatoValue;

    public String getFormatoChoice() {
        return formatoChoice;
    }

    public void setFormatoChoice(String formatoChoice) {
        this.formatoChoice = formatoChoice;
    }

    public Object getFormatoValue() {
        return formatoValue;
    }

    public void setFormatoValue(String formatoValue) {
        this.formatoValue = formatoValue;
    }

    private void fillSelectItemsVendedor() {
        List lista;
        if (vssrs != null) {
            lista = vssrs.listarVendedores();
            this.vendedorSelects = new SelectItem[lista.size()];
            SelectItem si = new SelectItem();
            int i = 0;
            for (Object o : lista) {
                si.setLabel(o.toString());
                si.setValue(o);
                vendedorSelects[i] = si;
                i++;
            }
        }

    }

    public void gerarRelatorio() {


        vssrs.gerarRelatorio(formatoValue.toString());

    }
}