Fill selectOneMenu on page load.

[grdzeli_kaci]

hi all, i'm newbie in seam.
i've one simple question. (i've seam documentation : seam_refference.pdf but could't resolv the problem)

ok, i have login page and there are some selectOneMenu - components. for example applications or languages. i need fill them on page sturtup from database. is there any doc or example which can help me ? or could anybody help me how to do it?

1.here is my login.xhtml file :

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
 xmlns:s="http://jboss.com/products/seam/taglib"
 xmlns:ui="http://java.sun.com/jsf/facelets"
 xmlns:f="http://java.sun.com/jsf/core"
 xmlns:h="http://java.sun.com/jsf/html"
 template="layout/template.xhtml">

 <ui:define name="body">
 <h:form id="loginForm">
 <table width="400" cellpadding="5" cellspacing="0" style="border: 1px solid #9e2629">
 <tr>
 <td class="LogonText" colspan="2" align="center">Login to System</td>
 </tr>
 <tr>
 <td class="td_new">
 <table width="100%" cellpadding="5" cellspacing="0" border="0">
 <tr>
 <td class="td_new" rowspan="5"><h:graphicImage value="/images/login_pic.gif"/></td>
 <td class="td_new">UserName</td>
 <td class="td_new">
 <h:inputText styleClass="font_style" value="" />
 </td>

 </tr>

 <tr>
 <td class="td_new">Password</td>
 <td class="td_new">
 <h:inputSecret styleClass="font_style" value="" />
 </td>

 </tr>

 <tr>
 <td class="td_new">Application</td>
 <td class="td_new">
 <h:selectOneMenu styleClass="font_style" value="">
 <!-- how i could write to fill this component? -->
 </h:selectOneMenu>
 </td>

 </tr>

 <tr>
 <td class="td_new">Language</td>
 <td class="td_new">
 <h:selectOneMenu styleClass="font_style" required="true" value="">
 <f:selectItems value="#{loginBean.langItems}" />
 <f:convertNumber type="number" />
 </h:selectOneMenu>
 </td>

 </tr>
 <tr>
 <td class="td_right" colspan="2">
 <h:commandButton id="LoginBtn"
 name="LoginBtn" class="Btn2"
 value="Login"
 onblur="return this.myonblur();"
 onfocus="return this.myonfocus();"
 onmouseout="return this.myonmouseout();"
 onmouseover="return this.myonmouseover();"/>
 <script type="text/javascript"><!--
 sjwuic_assign_button('loginForm:LoginBtn', defaultButtonStrings, true, false, false);
 //--></script>
 </td>
 <!--actionListener="" -->
 </tr>
 </table>
 </td>
 </tr>
 <tr>
 <td class="td_new" colspan="2"></td>
 </tr>
 <tr>
 <td class="td_new" colspan="2"></td>
 </tr>
 </table>
 </h:form>
 </ui:define>
</ui:composition>

2. and here is my entity bean for application :

@Entity
@Table(name = "LANGUAGE")
@Name("user")
@Scope(ScopeType.SESSION)
public class Language implements Serializable {
 @Id()
 @GeneratedValue(generator="LangIdGenerator")
 @SequenceGenerator(name = "LangIdGenerator", sequenceName = "SEQ_LANGUAGE_ID")
 @Column(name="LANGUAGE_ID", unique=true, nullable=false, precision=22)
 private Long languageId;

 @Column(name = "NAME")
 private String name;

 @Column(name = "SHORTNAME")
 private String shortname;

 @Lob
 @Column(name = "IMAGE")
 private byte [] image;

 @Lob
 @Column(name = "LOCALE")
 private byte [] locale;

 @Column(name = "REMARK")
 private String remark;

 @Column(name = "USER_ID")
 private BigInteger userId;

 @Column(name = "REC_STATUS")
 private BigInteger recStatus;

 @Column(name = "REG_DATE")
 @Temporal(TemporalType.DATE)
 private Date regDate;

 @Column(name = "UPD_DATE")
 @Temporal(TemporalType.DATE)
 private Date updDate;

 @OneToMany(mappedBy = "languageId")
 private Collection<LanguageProperty> languagePropertyCollection;

 transient private List<SelectItem> applications;

 /** Creates a new instance of Language */
 public Language() {
 }

 /**
 * Creates a new instance of Language with the specified values.
 * @param languageId the languageId of the Language
 */
 public Language(Long languageId) {
 this.languageId = languageId;
 }

 /**
 * Gets the languageId of this Language.
 * @return the languageId
 */
 public Long getLanguageId() {
 return this.languageId;
 }

 /**
 * Sets the languageId of this Language to the specified value.
 * @param languageId the new languageId
 */
 public void setLanguageId(Long languageId) {
 this.languageId = languageId;
 }

 /**
 * Gets the name of this Language.
 * @return the name
 */
 public String getName() {
 return this.name;
 }

 /**
 * Sets the name of this Language to the specified value.
 * @param name the new name
 */
 public void setName(String name) {
 this.name = name;
 }

 /**
 * Gets the shortname of this Language.
 * @return the shortname
 */
 public String getShortname() {
 return this.shortname;
 }

 /**
 * Sets the shortname of this Language to the specified value.
 * @param shortname the new shortname
 */
 public void setShortname(String shortname) {
 this.shortname = shortname;
 }

 /**
 * Gets the image of this Language.
 * @return the image
 */
 public byte [] getImage() {
 return this.image;
 }

 /**
 * Sets the image of this Language to the specified value.
 * @param image the new image
 */
 public void setImage(byte [] image) {
 this.image = image;
 }

 /**
 * Gets the locale of this Language.
 * @return the locale
 */
 public byte [] getLocale() {
 return this.locale;
 }

 /**
 * Sets the locale of this Language to the specified value.
 * @param locale the new locale
 */
 public void setLocale(byte [] locale) {
 this.locale = locale;
 }

 /**
 * Gets the remark of this Language.
 * @return the remark
 */
 public String getRemark() {
 return this.remark;
 }

 /**
 * Sets the remark of this Language to the specified value.
 * @param remark the new remark
 */
 public void setRemark(String remark) {
 this.remark = remark;
 }

 /**
 * Gets the userId of this Language.
 * @return the userId
 */
 public BigInteger getUserId() {
 return this.userId;
 }

 /**
 * Sets the userId of this Language to the specified value.
 * @param userId the new userId
 */
 public void setUserId(BigInteger userId) {
 this.userId = userId;
 }

 /**
 * Gets the recStatus of this Language.
 * @return the recStatus
 */
 public BigInteger getRecStatus() {
 return this.recStatus;
 }

 /**
 * Sets the recStatus of this Language to the specified value.
 * @param recStatus the new recStatus
 */
 public void setRecStatus(BigInteger recStatus) {
 this.recStatus = recStatus;
 }

 /**
 * Gets the regDate of this Language.
 * @return the regDate
 */
 public Date getRegDate() {
 return this.regDate;
 }

 /**
 * Sets the regDate of this Language to the specified value.
 * @param regDate the new regDate
 */
 public void setRegDate(Date regDate) {
 this.regDate = regDate;
 }

 /**
 * Gets the updDate of this Language.
 * @return the updDate
 */
 public Date getUpdDate() {
 return this.updDate;
 }

 /**
 * Sets the updDate of this Language to the specified value.
 * @param updDate the new updDate
 */
 public void setUpdDate(Date updDate) {
 this.updDate = updDate;
 }

 /**
 * Gets the languagePropertyCollection of this Language.
 * @return the languagePropertyCollection
 */
 public Collection<LanguageProperty> getLanguagePropertyCollection() {
 return this.languagePropertyCollection;
 }

 /**
 * Sets the languagePropertyCollection of this Language to the specified value.
 * @param languagePropertyCollection the new languagePropertyCollection
 */
 public void setLanguagePropertyCollection(Collection<LanguageProperty> languagePropertyCollection) {
 this.languagePropertyCollection = languagePropertyCollection;
 }

 /**
 * Returns a hash code value for the object. This implementation computes
 * a hash code value based on the id fields in this object.
 * @return a hash code value for this object.
 */
 @Override
 public int hashCode() {
 int hash = 0;
 hash += (this.languageId != null ? this.languageId.hashCode() : 0);
 return hash;
 }

 /**
 * Determines whether another object is equal to this Language. The result is
 * <code>true</code> if and only if the argument is not null and is a Language object that
 * has the same id field values as this object.
 * @param object the reference object with which to compare
 * @return <code>true</code> if this object is the same as the argument;
 * <code>false</code> otherwise.
 */
 @Override
 public boolean equals(Object object) {
 // TODO: Warning - this method won't work in the case the id fields are not set
 if (!(object instanceof Language)) {
 return false;
 }
 Language other = (Language)object;
 if (this.languageId != other.languageId && (this.languageId == null || !this.languageId.equals(other.languageId))) return false;
 return true;
 }

 /**
 * Returns a string representation of the object. This implementation constructs
 * that representation based on the id fields.
 * @return a string representation of the object.
 */
 @Override
 public String toString() {
 return "com.magti.seam.beans.billAdmin.Language[languageId=" + languageId + "]";
 }
}

3. and also i have Local Stateless session bean

@Local(BillAdminManagement.class)
@Stateless
@Name("billAdmin")
public class BillAdminManagementBean implements BillAdminManagement{

 @PersistenceContext
 private EntityManager entManager;

 @Logger
 private Log log;

 public List<Language> getLanguages() throws Exception {
 try {
 List<Language> list = entManager.createNamedQuery("Language.getAllLanguages").getResultList();
 log.info("List Size = "+list.size());
 return null;
 } catch (Exception e) {
 log.error("Error While Getting Languages",e);
 throw e;
 }
 }
}

how i can fill dropdownbox component from this method on page startup?

Regards,
Paata.

[pmuir]

try

<h:selectOneMenu value="#{foo.bar}">
 <s:selectItems value="#{billAdmin.languages}" var="language" label="#{language.name}" />
 <ec:convertEntity>
</h:selectOneMenu>

[grdzeli_kaci]

hi petemuir.
i tryed this:

1.my session bean :

@Local(BillAdminManagement.class)
@Stateless
@Name("billAdmin")
@TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
public class BillAdminManagementBean implements BillAdminManagement{

 @PersistenceContext
 private EntityManager entManager;

 @Logger
 private Log log;

 private List<SelectItem> langItems;

 Converter converter;

 public List<Language> getlangItems() throws Exception {
 try {
 List<Language> list = entManager.createNamedQuery("Language.getAllLanguages").getResultList();
 langItems = new ArrayList<SelectItem>(list.size());
 for (int i = 0; i < list.size(); i++) {
 SelectItem item = new SelectItem();
 item.setValue(list.get(i));
 item.setLabel(list.get(i).getName());
 item.setDescription("Blaaa");
 langItems.add(item);
 }
 log.info("List Size = "+list.size());
 return list;
 } catch (Exception e) {
 e.printStackTrace();
 log.error("Error While Getting Languages",e);
 throw e;
 }
 }
 public Converter getConverter() {
 converter = new ReferenceConverter(langItems);
 return converter;
 }
}

2. and also i have ReferenceConverter class from here
http://wiki.jboss.org/wiki/Wiki.jsp?page=SelectItems

3. and here is fragment from my page :

<h:selectOneMenu styleClass="font_style" required="true" value="" converter="#{billAdmin.converter}">
 <s:selectItems value="#{billAdmin.langItems}" var="langItems" label="#{language.name}" />
 </h:selectOneMenu>

but i got an error :

Value is no String (class=com.magti.seam.beans.billAdmin.Language, value=English) and component loginForm:_id24with path: {Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId: /login.xhtml][Class: javax.faces.component.html.HtmlForm,Id: loginForm][Class: javax.faces.component.html.HtmlSelectOneMenu,Id: _id24]} does not have a Converter

[pmuir]

That (obviously) is a problem with your converter. Either try the entityConverter as I suggested or take a look at the Seam ui-example for how to write a suitable converter.

[grdzeli_kaci]

"petemuir" wrote:
That (obviously) is a problem with your converter. Either try the entityConverter as I suggested or take a look at the Seam ui-example for how to write a suitable converter.

ok i tryed to write own converter, i got it from wiki :
1.Converter

import java.io.Serializable;
import java.util.List;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.ConverterException;

public class ReferenceConverter implements Converter, Serializable{
 private static final long serialVersionUID = -6268456071880135380L;
 private static final String EMPTY = "__EMPTY__";
 private List<Object> values;
 public ReferenceConverter(List vals) {
 this.values = vals;
 }
 public String getAsString(FacesContext facesContext,
 UIComponent component,
 Object obj) {
 if (obj == null) return EMPTY;
 if ("-1".equals(obj)) return EMPTY;

 String val = String.valueOf( obj.hashCode() );
 return val;
 }
 public Object getAsObject(FacesContext facesContext,
 UIComponent component,
 String str)
 throws ConverterException {
 if (str == null || str.length()==0 || EMPTY.equals(str)) {
 return null;
 }
 int hash = Integer.valueOf(str).intValue();
 for (Object val : values) {
 if ( val!=null && val.hashCode()==hash ) {
 return val;
 }
 }
 return null;
 }
}

2. i posted session bean above;
3 and jps :

<h:selectOneMenu styleClass="font_style" required="true" value="" converter="#{billAdmin.converter}">
<s:selectItems value="#{billAdmin.langItems}" var="langItems" label="#{langItems.name}" />
</h:selectOneMenu>

what i did wrong ?

i could not find about converter into seam-ui examples.

[pmuir]

"grdzeli_kaci" wrote:
i could not find about converter into seam-ui examples.

examples/ui/src/org/jboss/seam/example/ui/Converters

[grdzeli_kaci]

"petemuir" wrote:

"grdzeli_kaci" wrote:
i could not find about converter into seam-ui examples.

examples/ui/src/org/jboss/seam/example/ui/Converters

i've downloaded both of them jboss-seam-1.1.5.GA and jboss-seam-1.1.5.GA.
both of them contains examples package but none of them does not contains ui folder.

is there any other examples download link ?

[grdzeli_kaci]

Great Thanks petemuir,

i got seam from CVS and i found your examples and all works fine.