Custom Component
I've a problem extendign the UISelectOne component...
My classes:
package holderTagClasses;
import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.el.MethodBinding;
import javax.faces.el.ValueBinding;
import javax.faces.event.ValueChangeEvent;
import javax.faces.webapp.UIComponentTag;
public class BDE_IAS_ComboTag extends UIComponentTag{
String lista;
String listaValores;
String value;
String valueChangeListener;
public String getValueChangeListener() {
return valueChangeListener;
}
public void setValueChangeListener(String valueChangeListener) {
this.valueChangeListener = valueChangeListener;
}
public void setLista(String lista){
this.lista=lista;
}
public String getLista(){
return lista;
}
public void setListaValores(String lista){
this.listaValores=lista;
}
public String getListaValores(){
return listaValores;
}
public void setValue(String valor){
this.value=valor;
}
public String getValue(){
return value;
}
public void release() {
// the super class method should be called
super.release();
lista=null;
value=null;
valueChangeListener=null;
listaValores=null;
}
protected void setProperties(UIComponent component) {
super.setProperties(component);
if (lista != null) {
if (isValueReference(lista)) {
ValueBinding vb =
FacesContext.getCurrentInstance().getApplication().createValueBinding(lista);
component.setValueBinding("lista", vb);
} else {
if(lista.length()==0){
lista=null;
}
else{
component.getAttributes().put("lista",lista);
}
}
}
if (listaValores != null) {
if (isValueReference(listaValores)) {
ValueBinding vb
=FacesContext.getCurrentInstance().getApplication().createValueBinding(listaValores);
component.setValueBinding("listaValores", vb);
} else {
if(listaValores.length()!=0){
component.getAttributes().put("listaValores",listaValores);
}
else{
if(lista!=null){
if(lista.length()>0){
ValueBinding vb
=FacesContext.getCurrentInstance().getApplication().createValueBinding(lista);
component.setValueBinding("listaValores", vb);
}
}
}
}
}
if (value!=null) {
if (isValueReference(value)) {
ValueBinding vb =
FacesContext.getCurrentInstance().getApplication().createValueBinding(value);
component.setValueBinding("value", vb);
}
else {
if(value.length()==0){
value=null;
}
else{
component.getAttributes().put("value",value);
}
}
}
if (valueChangeListener != null) {
if (isValueReference(valueChangeListener)) {
FacesContext context = FacesContext.getCurrentInstance();
Application app = context.getApplication();
MethodBinding mb = app.createMethodBinding(valueChangeListener,
new Class[] { ValueChangeEvent.class });
component.getAttributes().put("valueChangeListener", mb);
}
}
}
public String getRendererType() { return "combo"; }
public String getComponentType() { return "combo"; }
}
package rendererClasses;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Map;
import javax.faces.component.EditableValueHolder;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.render.Renderer;
public class ComboRenderer extends Renderer{
public void
Re: Custom Component
JAVA IS 1.4
I'm not using myFaces
Original Message Follows
From: Udo Schnurpfeil <[EMAIL PROTECTED]>
Reply-To: "MyFaces Discussion"
To: MyFaces Discussion
Subject: Re: Custom Component
Date: Thu, 15 Sep 2005 12:30:49 +0200
Hi!
What is the Java version?
What is the MyFaces version?
Udo
Goyo Escobar Escalero wrote:
I've a problem extendign the UISelectOne component...
My classes:
package holderTagClasses;
import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.el.MethodBinding;
import javax.faces.el.ValueBinding;
import javax.faces.event.ValueChangeEvent;
import javax.faces.webapp.UIComponentTag;
public class BDE_IAS_ComboTag extends UIComponentTag{
String lista;
String listaValores;
String value;
String valueChangeListener;
public String getValueChangeListener() {
return valueChangeListener;
}
public void setValueChangeListener(String valueChangeListener) {
this.valueChangeListener = valueChangeListener;
}
public void setLista(String lista){
this.lista=lista;
}
public String getLista(){
return lista;
}
public void setListaValores(String lista){
this.listaValores=lista;
}
public String getListaValores(){
return listaValores;
}
public void setValue(String valor){
this.value=valor;
}
public String getValue(){
return value;
}
public void release() {
// the super class method should be called
super.release();
lista=null;
value=null;
valueChangeListener=null;
listaValores=null;
}
protected void setProperties(UIComponent component) {
super.setProperties(component);
if (lista != null) {
if (isValueReference(lista)) {
ValueBinding vb =
FacesContext.getCurrentInstance().getApplication().createValueBinding(lista);
component.setValueBinding("lista", vb);
} else {
if(lista.length()==0){
lista=null;
}
else{
component.getAttributes().put("lista",lista);
}
}
}
if (listaValores != null) {
if (isValueReference(listaValores)) {
ValueBinding vb
=FacesContext.getCurrentInstance().getApplication().createValueBinding(listaValores);
component.setValueBinding("listaValores", vb);
} else {
if(listaValores.length()!=0){
component.getAttributes().put("listaValores",listaValores);
}
else{
if(lista!=null){
if(lista.length()>0){
ValueBinding vb
=FacesContext.getCurrentInstance().getApplication().createValueBinding(lista);
component.setValueBinding("listaValores", vb);
}
}
}
}
}
if (value!=null) {
if (isValueReference(value)) {
ValueBinding vb =
FacesContext.getCurrentInstance().getApplication().createValueBinding(value);
component.setValueBinding("value", vb);
}
else {
if(value.length()==0){
value=null;
}
else{
component.getAttributes().put("value",value);
}
}
}
if (valueChangeListener != null) {
if (isValueReference(valueChangeListener)) {
FacesContext context = FacesContext.getCurrentInstance();
Application app = context.getApplication();
MethodBinding mb =
app.createMethodBinding(valueChangeListener, new Class[] {
ValueChangeEvent.class });
component.getAttributes().put("valueChangeListener", mb);
}
}
}
public String getRendererType() { return "combo"; }
public String getComponentType() { return "combo"; }
}
package rendererClasses;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Map;
import javax.faces.component.EditableValueHolder;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.render.Renderer;
public class ComboRenderer extends Renderer{
public void encodeBegin(FacesContext context, UIComponent combo)
throws IOException {
ResponseWriter writer = context.getResponseWriter();
char salto ='\n';
try{
//ArrayList lista = (ArrayList)getLista();
ArrayLis
rendering a custom component
If I have inside of my encodeBegin method a UISelectOne object... how can I render it??
ValueChangeListener another time...
I want to develop a comboBox wich ge 2 arrayList, one for the labels and one for the values, that's ok, I do it with those methods...
public void encodeBegin(FacesContext context) throws IOException { ResponseWriter writer = context.getResponseWriter(); char salto = '\n';
try { ArrayList lista = (ArrayList)getLista(); ArrayList listaValores = new ArrayList(); ; if (lista != null) {listaValores = (ArrayList) this.getAttributes().get( "listaValores");if (listaValores == null) { listaValores = lista;} else { if (listaValores.size() == 0) { listaValores = lista; }} } ArrayList list = new ArrayList(); Application app =
context.getApplication(); HtmlSelectOneListbox comb = new HtmlSelectOneListbox(); int i = 0; String valor = ""; valor = (String) this.getAttributes().get("value"); for (i = 0; i < lista.size(); i++) {UISelectItem sel = new UISelectItem();sel.setItemValue(listaValores.get(i));sel.setItemLabel((String) lista.get(i));String
selected="selected";comb.getChildren().add(sel); } comb.setId(this.getId()); comb.setSize(1); comb.setStyleClass("comboBox"); comb.decode(context); try {renderChild(context, comb); } catch (IOException e) {e.printStackTrace(); }
} catch (Exception e) { System.out.println(e); }
}
public static void renderChild(FacesContext facesContext, UIComponent child) throws IOException { if (!child.isRendered()) { return; }
child.encodeBegin(facesContext); if (child.getRendersChildren()) { child.encodeChildren(facesContext); } else { renderChildren(facesContext, child); } child.encodeEnd(facesContext); }
public static void renderChildren(FacesContext facesContext, UIComponent component) throws IOException { if (component.getChildCount() > 0) { for (Iterator it = component.getChildren().iterator(); it.hasNext();) {UIComponent child = (UIComponent) it.next();renderChild(facesContext, child); } } }
Now I want to add it a valueChangeLisntener... but I'm unable to do it... for this I have the next method at the tag-class
protected void setProperties(UIComponent component) { super.setProperties(component); BDE_IAS_UICombo listaMenu=(BDE_IAS_UICombo) component;if (lista != null) { if (isValueReference(lista)) {ValueBinding vb =FacesContext.getCurrentInstance().getApplication().createValueBinding(lista);listaMenu.setValueBinding(BDE_IAS_UIComboBox.LISTA_VB, vb); } else {if(lista.length()==0){ lista=null;}else{ listaMenu.setLista(lista); } } }if (listaValores != null)
{ if (isValueReference(listaValores)) {ValueBinding vb =FacesContext.getCurrentInstance().getApplication().createValueBinding(listaValores);listaMenu.setValueBinding(BDE_IAS_UIComboBox.LISTAVALORES_VB, vb); } else {if(listaValores.length()!=0){ listaMenu.setListaValores(listaValores);}else{ if(lista!=null){ if(lista.length()>0){ ValueBinding vb =FacesContext.getCurrentInstance().getApplication().createValueBinding(lista); listaMenu.setValueBinding(BDE_IAS_UIComboBox.LISTA_VB,
vb); } }} } }
if (valueChangeListener != null) { if (isValueReference(valueChangeListener)) { FacesContext context = FacesContext.getCurrentInstance(); Application app = context.getApplication(); MethodBinding mb = app.createMethodBinding(valueChangeListener, new Class[] { ValueChangeEvent.class }); listaMenu.setValueChangeListener(mb); } } }
Debugging I'm sure taht the alue of the methodBinding is ok, but the methodisn't executed
WHATH HAVE I TO DO??? Please help me...;-)
One more thing, If I want to select one of the item by default, how can I implement it?? I would pass the component a value, whin matches with an itm of the list, and then it must be selected... is it possible??
RE: javax.faces.el.PropertyNotFoundException: Base is null when upgrading to 1.1.0?
try to call the property with lower case, I mean... "beanClass.base" From: Bjørn T Johansen <[EMAIL PROTECTED]>Reply-To: "MyFaces Discussion" To: MyFaces Discussion Subject: javax.faces.el.PropertyNotFoundException: Base is null when upgrading to 1.1.0?Date: Wed, 21 Sep 2005 12:15:17 +0200I am trying to upgrade my application to 1.1.0 but when I do, I get this exception.:javax.faces.el.PropertyNotFoundException: Base is null: loginBeanorg.apache.myfaces.el.ValueBindingImpl.resolveToBaseAndProperty(ValueBindingImpl.java:457)org.apache.myfaces.el.ValueBindingImpl.getType(ValueBindingImpl.java:169)com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getConvertedValue(HtmlBasicInputRenderer.java:111)javax.faces.component.UIInput.getConvertedValue(UIInput.java:713)javax.faces.component.UIInput.validate(UIInput.java:638)javax.faces.component.UIInput.executeValidate(UIInput.java:849)javax.faces.component.UIInput.processValidators(UIInput.java:412)javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:912)javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:912)javax.faces.component.UIForm.processValidators(UIForm.java:170)javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:912)javax.faces.compo nent.UIViewRoot.processValidators(UIViewRoot.java:342)org.apache.myfaces.lifecycle.LifecycleImpl.processValidations(LifecycleImpl.java:208)org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:76)javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)org.apache.shale.faces.ShaleApplicationFilter.doFilter(ShaleApplicationFilter.java:280)What am I missing?Regards,BTJ-Bjørn T Johansen[EMAIL PROTECTED]---Someone wrote:"I understand that if you play a Windows CD backwards you hear strange Satanic messages"To which someone replied:"It's even worse than that; play it forwards and it installs Windows"---
How can I include IBM components into mines ones
I need, for example, a 4 buttons component, but i'd like to use the IBM buttons to do it. Could someone write me any code to do it or the way to do it??
