JSF复合组件中Primefaces SelectEvent无法找到Bean方法

我正在为项目开发自定义复合组件，组件包含触发独立模态框搜索的按钮，以及接收SelectEvent的方法，用于处理用户选择的值并设置到Bean中。但目前遇到的问题是，复合组件无法找到Ajax对话框返回对应的Bean方法。

使用环境：JSF 2.3 + Primefaces 10.0.0

复合组件inputConverter.xhtml代码 #

<?xml version = "1.0" encoding = "UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns = "http://www.w3.org/1999/xhtml"   
      xmlns:composite = "http://java.sun.com/jsf/composite"
      xmlns:p="http://primefaces.org/ui">

    <composite:interface>
        <composite:attribute name = "labelValue" required="true"/>
        <composite:attribute name = "inputId" required="true"/>
        <composite:attribute name = "inputValue" required="true"/>
        <composite:attribute name = "inputObject" required="true"/>                        
        <composite:attribute name = "limpaAction" method-signature="void limpaAction()" required="true"/>
        <composite:attribute name = "buscaAction" method-signature="void buscaAction()" required="true"/>
        <composite:attribute name = "retornoAction" method-signature="void retornoAction(org.primefaces.event.SelectEvent)" />                                                                        
    </composite:interface>

    <composite:implementation>
        <p:panelGrid columns="1">
            <p:outputLabel for="@next" value="#{cc.attrs.labelValue}"/>

            <p:panelGrid columns="3" styleClass="ui-inputgroup">
                <p:inputText value="#{cc.attrs.inputValue}" readonly="true"/>
                
                <p:commandButton action="#{cc.attrs.limpaAction}" rendered="#{not empty cc.attrs.inputObject}" update="@parent" icon="pi pi-trash" styleClass="ui-button-danger"/>
                <p:commandButton action="#{cc.attrs.buscaAction}" icon="pi pi-search" styleClass="ui-button-info" >
                    <p:ajax event="dialogReturn" listener="#{cc.attrs.retornoAction}" update="@parent"/>
                </p:commandButton>
            </p:panelGrid>
        </p:panelGrid>
    </composite:implementation>
</html>

主页面调用方式 #

<custom:inputConverter 
    labelValue="País"                                
    inputObject="#{pacienteBean.paciente.paisNacionalidade}"
    inputId="#{pacienteBean.paciente.paisNacionalidade.id}"
    inputValue="#{pacienteBean.paciente.paisNacionalidade.nome}"
    buscaAction="#{pacienteBean.buscaNacionalidade}"
    retornoAction="#{pacienteBean.selecionaNacionalidade}"
    limpaAction="#{pacienteBean.limpaNacionalidade}"
/>

Bean中的目标方法 #

public void selecionaNacionalidade(SelectEvent<Pais> e) {
    objetoCrud.setPaisNacionalidade(e.getObject());
}

直接在复合组件中调用#{pacienteBean.selecionaNacionalidade}可正常工作，但通过复合属性调用时失败，修改retornoAction的method-signature也无效。选择搜索对话框值时，会抛出javax.el.PropertyNotFoundException等错误。

临时解决方案 #

通过添加p:remoteCommand、创建会话级BuscaBean中转事件对象解决，具体步骤如下：

1. 在inputConverter.xhtml中添加远程命令：

<p:remoteCommand name="#{cc.id}" action="#{cc.attrs.retornoAction}" immediate="true"/>

2. 修改dialogReturn的Ajax监听：

<p:ajax event="dialogReturn" listener="#{buscaBean.resultadoPesquisaInputConverter}"
        oncomplete="#{cc.id}()"/>

3. 创建BuscaBean.java：

public static <T> void resultadoPesquisaInputConverter(SelectEvent<T> event) {
    objetoSelecionado = event.getObject();
}

4. 修改Bean中的方法：

@Inject
private BuscaBean buscaBean;

public void selecionaNacionalidade() {
    objetoCrud.setPaisNacionalidade(buscaBean.getResultadoPesquisa(Pais.class));
}

5. 修改后的组件调用：

<custom:inputConverter 
    labelValue="País"                                
    inputObject="#{pacienteBean.paciente.paisNacionalidade}"
    inputId="#{pacienteBean.paciente.paisNacionalidade.id}"
    inputValue="#{pacienteBean.paciente.paisNacionalidade.nome}"
    buscaAction="#{buscaBean.abrirBuscaPaises}"
    retornoAction="#{pacienteBean.selecionaNacionalidade}"
    limpaAction="#{pacienteBean.limpaNacionalidade}"
    />

内容的提问来源于stack exchange，提问作者Guilherme Pereira