4
由於我已詢問my last question（仍未回覆），我繼續搜索解決方案，最後發現this topic，我認爲這可以幫助實現我想要的效果。如何以編程方式將AjaxBehavior添加到具有primefaces的UIComponent
所以，我試過這個解決方案（它本身是一個解決方法），但它仍然不適合我。
下面是代碼，這一切都只是針對此問題的測試：
中的index.xhtml：
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:c="http://java.sun.com/jsp/jstl/core">
<h:head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>dyn add comps test </title>
</h:head>
<body>
<h:form id="form1">
<!-- once this first commandLink is clisked it will generate another commandlink below it -->
<h:commandLink value="cliick me">
<f:ajax event="click" listener="#{myBean.firstcmdLinkListenerHandler}"/>
</h:commandLink>
</h:form>
</body>
</html>
管理bean：MyBean.java
package mybeans;
import javax.el.ExpressionFactory;
import javax.el.MethodExpression;
import javax.faces.application.Application;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.component.UIComponent;
import javax.faces.component.html.HtmlCommandLink;
import javax.faces.context.FacesContext;
import javax.faces.event.AjaxBehaviorEvent;
import javax.faces.event.BehaviorEvent;
import org.primefaces.component.behavior.ajax.AjaxBehaviorListenerImpl;
import org.primefaces.context.RequestContext;
@ManagedBean
@SessionScoped
public class MyBean {
public void handleClose(AjaxBehaviorEvent abe){
System.out.println("!!!-->>>>> the Ajax Behaviour Works !!!!! ");
}
public void reLoadCityList(BehaviorEvent event){
System.out.println("!!!-->>>>> the reLoadCityList method Works !!!!! ");
}
public void firstcmdLinkListenerHandler(AjaxBehaviorEvent abe){
System.out.println("firstcmdLinkListenerHandleris running ! ");
FacesContext fc = FacesContext.getCurrentInstance();
Application application = fc.getApplication();
ExpressionFactory ef = fc.getApplication().getExpressionFactory();
UIComponent form1 = fc.getViewRoot().findComponent("form1");
if(form1!=null){
//Creating the commandLink
HtmlCommandLink mynewcmdlink = (HtmlCommandLink)application.createComponent(HtmlCommandLink.COMPONENT_TYPE);
mynewcmdlink.setId("mynewcmdlink");
mynewcmdlink.setValue("clickme2!!");
MyAjaxBehavior pajax = new MyAjaxBehavior();
Class[] par = new Class[1];
par[0] = BehaviorEvent.class;
//par[0] = AjaxBehaviorEvent.class; (*)
//pajax.setListener(myCreateMetExpression("reLoadCityList", true, //void.class, par));
//i tried with both AjaxBehaviorEvent and BehaviorEvent as in (*)
//MethodExpression me = ef.createMethodExpression( //fc.getELContext(), "#{myBean.handleClose}", void.class, par);
MethodExpression me = ef.createMethodExpression(fc.getELContext(), "#{myBean.reLoadCityList}", void.class, par);
//pajax.setListener(me); //i've tried with this too but it wasn't sucesseful
pajax.addAjaxBehaviorListener(new AjaxBehaviorListenerImpl(me));
pajax.setProcess("@this");
mynewcmdlink.addClientBehavior("change", pajax);
//adding thecommanLink to the form
form1.getChildren().add(mynewcmdlink);
//Refreshing the form to see the added commandLink :
RequestContext context = RequestContext.getCurrentInstance();
context.update("form1");
context.update("form1:foo");
}else
System.out.println("form1 is null!!");
}
和MyAjaxBehavior.java在primefaces論壇文章中用作解決方法：
package mybeans;
import java.util.HashMap;
import javax.el.ELContext;
import javax.el.MethodExpression;
import javax.faces.component.UIComponentBase;
import javax.faces.context.FacesContext;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.BehaviorEvent;
import org.primefaces.component.behavior.ajax.AjaxBehavior;
public class MyAjaxBehavior extends AjaxBehavior {
@Override
public Object saveState(FacesContext context) {
HashMap<String, Object> map;
map = new HashMap<String, Object>();
map.put("update", getUpdate());
map.put("process", getProcess());
map.put("oncomplete", getOncomplete());
map.put("onerror", getOnerror());
map.put("onsuccess", getOnsuccess());
map.put("onstart", getOnstart());
map.put("listener", getListener());
if (initialStateMarked())
return null;
return UIComponentBase.saveAttachedState(context, map);
}
@SuppressWarnings("unchecked")
@Override
public void restoreState(FacesContext context, Object state) {
if (state != null) {
HashMap<String, Object> map;
map = (HashMap<String, Object>) UIComponentBase
.restoreAttachedState(context, state);
setUpdate((String) map.get("update"));
setProcess((String) map.get("process"));
setOncomplete((String) map.get("oncomplete"));
setOnerror((String) map.get("onerror"));
setOnsuccess((String) map.get("onsuccess"));
setOnstart((String) map.get("onstart"));
setListener((MethodExpression) map.get("listener"));
}
}
@Override
public void broadcast(BehaviorEvent event) throws AbortProcessingException {
ELContext eLContext = FacesContext.getCurrentInstance().getELContext();
// Backward compatible implementation of listener invocation
if (getListener() != null) {
try {
getListener().invoke(eLContext, new Object[] { event });
} catch (IllegalArgumentException exception) {
getListener().invoke(eLContext, new Object[0]);
}
}
}
}