Binding a Bean to Component

Question

hello!
i would like to bind a bean to a component from a jsp...
the jsp:
<jsp:useBean id="myBean" class="src.veranst.VeranstaltungBean" scope="session"/>
<jsp:setProperty name="myBean" value="2.4.2000" property="startDate" />
<f:view>
  <h:form>
    <pkg:DateInput date="#{myBean.startDate}" />
    ...I don't understand why my "DateInput"-component is called with the string "#{useBean.startDate}" and not with the value of the bean-property. I've also tried to define the component with the <managed-bean>-tag in the faces-config.xml.
thanks,
Hanspeter Klapf

Answer 1

When I log the param date from the method setDate(), it has the value "#{myBean.startDate}".
Shouldn't the string contain the value of myBean.startDate and not its name? The value here is only the string "#{myBean.startDate}", it will be convert to the value of the myBean.getStartDate() in future(in the setProperties function...)
The method setProperties then would cast the UIComponent to the type of my own component and >assign the value date to the corresponding property of the component, or am I wrong?Please write the setProperties() method like this:
        if (( date != null) {
            if (UIComponentTag.isValueReference(date )) {
               //since the jsp code will use    date="#{myBean.startDate}", this condintin will be true and executed
                javax.faces.el.ValueBinding vb = getFacesContext().
                                                getApplication().
                                                createValueBinding(date );
               //here will get the value that stored in your bean named "myBean"
                command.setValueBinding("date ", vb);
            } else {
                command.getAttributes().put("date ", date );
        }and your UIComponent should be written like this:
  public Object getDate(){
        if (date!= null) {
            return date;
       //if your jsp use date="#{myBean.startDate}", the date  variable will be null, and execute the statements belwo.
        ValueBinding vb = getValueBinding("date");
        //this statement will get the value from your bean named "myBean" and use the getter method
        if (vb != null) {
            return vb.getValue(getFacesContext());
        } else {
            return null;
    }hope be helpful.
David