Pass current UIComponent as "this" in action MethodExpression

Question

Is there a possibility to pass current UIComponent as this in action's MethodExpression?

XHTML

<p:menuitem id="test" value="Test" action="#{controller.test(this)}" update="test" />

Java

public String test(MenuItem item) {
    // Do something with item
    return null;
}

Answer 1

You can use the implicit EL variable #{component} for this:

<p:menuitem ... action="#{controller.test(component)}" />

with

public void test(UIComponent component) {
    // ...
}

---

Or if you're only interested in for example the id attribute:

<p:menuitem ... action="#{controller.test(component.id)}" />

with

public void test(String id) {
    // ...
}

---

Or if you're only interested in for example the value attribute:

<p:menuitem ... action="#{controller.test(component.value)}" />

with

public void test(String value) {
    // ...
}

---

You can alternatively also use UIComponent#getCurrentComponent() for this:

<p:menuitem ... action="#{controller.test}" />

with

public void test() {
    UIComponent component = UIComponent.getCurrentComponent(FacesContext.getCurrentInstance());
    String id = component.getId();
    String value = ((MenuItem) component).getValue();
    // ...
}