Using subTable for grouping

A helper component, subTable can be used to group row data inside a table.

How to do it…

A basic definition of a table that contains subTable is given here:

<p:dataTable value="#{dataTableBean.boxers}" var="boxer">
  <f:facet name="header">
    Boxers
  </f:facet>

  <p:columnGroup type="header">
    <p:row>
      <p:column rowspan="2" headerText="Boxer" />
      <p:column colspan="2" headerText="Stats" />
    </p:row>
    <p:row>
      <p:column headerText="Wins" />
      <p:column headerText="Losses" />
    </p:row>
  </p:columnGroup>

  <p:subTable var="stats" value="#{boxer.stats}">
    <f:facet name="header">
      <h:outputText value="#{boxer.name}" />
    </f:facet>
    <p:column>
      <h:outputText value="#{stats.match}" />
    </p:column>
    <p:column>
      <h:outputText value="#{stats.win}" />
    </p:column>
    ...