How to pass selected value from selectOneRadio tag to fileUpload tag in PrimeFaces - file-upload

Question

I'm using PrimeFaces 6.0. I used selectOneRadio tag and populates the list from database, and then I would like to use the selected value to identify the type of document selected and pass this to fileUploadListener so that the right document type is attached to file being uploaded. How do I pass that selected value?
<p:selectOneRadio id="docType" value="#{fileUploadBean.docType}" layout="grid" columns="1">
<f:selectItems var="document" value="#{fileUploadBean.docDescriptionList}" itemLabel="#{docType}" itemValue="#{docType}" />
</p:selectOneRadio>
<p:fileUpload id="docFile" value="#{fileUploadBean.file}" mode="advanced" allowTypes="/(\.|\/)(pdf)$/"
fileUploadListener="#{fileUploadBean.uploadFile}" multiple="true" update="messages">
</p:fileUpload>
<p:growl id="messages" showDetail="true" />

Answer 1

You'll need to add variable for allowed types and then update it when radio button is changed:
<p:selectOneRadio id="docType"
value="#{fileUploadBean.docType}"
layout="grid"
columns="1">
<p:ajax listener="#{fileUploadBean.updateAllowTypes}" update="#form" />
<f:selectItems var="document"
value="#{fileUpoadBean.docDescriptionList}"
itemLabel="#{docType}"
itemValue="#{docType}" />
</p:selectOneRadio>
<p:fileUpload id="docFile"
value="#{fileUploadBean.file}"
mode="advanced"
allowTypes="#{fileUploadBean.allowTypes}"
fileUploadListener="#{fileUploadBean.uploadFile}"
multiple="true"
update="messages">
</p:fileUpload>
And in Java bean:
private String allowTypes; //getters and setters
...
public void updateAllowTypes(){
allowTypes = ... //Specify allowed types
}