Programmatically adding selectonemenu - jsf

Question

I have a problem with adding selectonemenu component of Primefaces at runtime.
I added the selectonemenu but it doesnt display the name or attrbt of the objects , it shows references of them.
Thank you for your time .
<ui:composition template="/pages/admin/admin.xhtml"
xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui">
<ui:define name="center">
<h:form id="openposition">
<h:panelGrid id="openpanelposition" columns="1">
<p:outputLabel value="#{menu['menu.admin.openposition.name']}"/>
<p:selectOneMenu id="positiontype" value="#{openPositionController.position}" converter="#{positionConverter}" panelStyle="width:180px"
effect="fade" var="u" style="width:160px" filter="true" filterMatchMode="startsWith">
<f:selectItems value="#{openPositionController.positionList}" var="position" itemLabel="#{position.name}" itemValue="#{position}" />
<p:column>
<h:outputText value="#{u.name}" />
</p:column>
</p:selectOneMenu>
<h:panelGrid id="unitgroup" columns="1">
<p:selectOneMenu id="higherunit" value="#{openPositionController.unit}" converter="#{unitConverter}" panelStyle="width:180px"
effect="fade" var="unit" style="width:160px" filter="true" filterMatchMode="startsWith"
valueChangeListener="#{openPositionController.selectunit}">
<f:selectItems value="#{openPositionController.unitList}" var="unit" itemLabel="#{unit.unitName}" itemValue="#{unit}" />
<p:ajax update="#this"/>
<p:column>
<h:outputText value="#{unit.unitName}" />
</p:column>
</p:selectOneMenu>
</h:panelGrid>
</h:panelGrid>
</h:form>
</ui:define>
</ui:composition>
package tr.com.innova.hrm.web.controller.menucontroller;
/**
* Created by mcan on 22/01/2015.
*/
import org.primefaces.component.selectonemenu.SelectOneMenu;
import org.primefaces.context.RequestContext;
import tr.com.innova.hrm.model.entity.Position;
import tr.com.innova.hrm.model.entity.Unit;
import tr.com.innova.hrm.service.api.business.PositionService;
import tr.com.innova.hrm.service.api.business.UnitService;
import tr.com.innova.hrm.web.converter.UnitConverter;
import javax.annotation.PostConstruct;
import javax.el.ELContext;
import javax.el.ExpressionFactory;
import javax.el.ValueExpression;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;
import javax.faces.bean.ViewScoped;
import javax.faces.component.UISelectItems;
import javax.faces.component.html.HtmlPanelGrid;
import javax.faces.component.html.HtmlPanelGroup;
import javax.faces.context.FacesContext;
import java.io.Serializable;
import java.util.List;
#ManagedBean(name = "openPositionController")
#ViewScoped
public class OpenPositionViewController implements Serializable{
private Position position;
private Unit unit;
private List<Position> positionList;
private List<Unit> unitList;
#ManagedProperty("#{positionService}")
private PositionService service;
#ManagedProperty("#{unitService}")
private UnitService unitService;
public UnitService getUnitService() {
return unitService;
}
public void setUnitService(UnitService unitService) {
this.unitService = unitService;
}
public Unit getUnit() {
return unit;
}
public void setUnit(Unit unit) {
this.unit = unit;
}
public List<Unit> getUnitList() {
return unitList;
}
public void setUnitList(List<Unit> unitList) {
this.unitList = unitList;
}
public Position getPosition() {
return position;
}
public void setPosition(Position position) {
this.position = position;
}
public List<Position> getPositionList() {
return positionList;
}
public void setPositionList(List<Position> positionList) {
this.positionList = positionList;
}
public PositionService getService() {
return service;
}
public void setService(PositionService service) {
this.service = service;
}
#PostConstruct
public void init()
{
positionList = service.loadAll();
unitList = unitService.getAllUnit();
FacesContext.getCurrentInstance().getViewRoot();
}
public void selectunit()
{
HtmlPanelGrid component = (HtmlPanelGrid) FacesContext.getCurrentInstance().getViewRoot().findComponent(":openposition:unitgroup");
SelectOneMenu oneMenu = new SelectOneMenu();
oneMenu.setRendered(true);
oneMenu.setConverter(new UnitConverter());
UISelectItems items = new UISelectItems();
ValueExpression expr = getValueExpression("#{openPositionController.unitList}");
items.setValueExpression("value", expr);
oneMenu.getChildren().add(items);
component.getChildren().add(oneMenu);
RequestContext context = RequestContext.getCurrentInstance();
context.update("openposition");
context.update("openposition:unitgroup");
}
private ValueExpression getValueExpression(String expression) {
ExpressionFactory expressionFactory = FacesContext.getCurrentInstance().getApplication().getExpressionFactory();
ELContext expressionContext = FacesContext.getCurrentInstance().getELContext();
return expressionFactory.createValueExpression(expressionContext, expression, Object.class);
}
}

Answer 1

Here is my answer for the future generations...
This is the way i've created a SelectOneMenu of PrimeFaces programmatically:
// Get context and expression factory
FacesContext context = FacesContext.getCurrentInstance();
ExpressionFactory ef = context.getApplication().getExpressionFactory();
// Create panel grid
HtmlPanelGrid grid = new HtmlPanelGrid();
grid.setColumns(2);
// Create the select label
OutputLabel comboLabel = new OutputLabel();
comboLabel.setValue(obj.getNameFilter());
comboLabel.setFor(cmpName);
grid.getChildren().add(comboLabel);
// The biding expression of the select
ValueExpression comboExpr = ef.createValueExpression(context.getELContext(),
"#{MbDinamicReports.valueCombo}", String.class);
// Create the select
SelectOneMenu comboBox = new SelectOneMenu();
comboBox.setId(cmpName);
comboBox.setValueExpression("value", comboExpr);
// Here the items are added
for (int i = 0; i < 3; i++) {
UISelectItem item = new UISelectItem();
item.setItemLabel("Label" + i);
item.setItemValue("value" + i);
comboBox.getChildren().add(item);
}
grid.getChildren().add(comboBox);