Conditionally display row using JSF Datatable

Question

I have some JSF code that currently works (as shown below), and I need to modify it to conditionally suppress the display of certain rows of the table. I know how to conditionally suppress the display of a particular cell, but that seems to create an empty cell, while what I'm trying to do is to not display the row at all.

Any suggestions?

<h:dataTable styleClass="resultsTable" id="t1" value="#{r.common}" var="com" headerClass="headerBackgrnd" rowClasses="rowOdd, rowEven" columnClasses="leftAlign, rightAlign, leftAlign">
    <h:column>
        <h:outputText rendered="#{com.rendered}" styleClass="inputText" value="#{com.description}: " />
    </h:column>
    <h:column>
        <h:outputText styleClass="outputText" value="#{com.v1}" />
    </h:column>
    <h:column>
        <h:inputText styleClass="inputText" value="#{com.v2}" />
   </h:column>
</h:dataTable>

Basically, the line that says #{com.rendered} will conditionally display the contents of a single cell, producing an empty cell when com.rendered is false. But I want to skip an entire row of the display under certain conditions - how would I go about doing that?

Answer 1

Rows correspond to data objects in the collection of your table. If you don't want the row, don't put the object in the collection.

Alternatively, you can use the rowClasses parameter for dataTable.

Bean code:

public String getRowClasses() {
    StringBuilder sb = new StringBuilder();
    for (Data data : myData) {
        sb.append(data.hide ? 'hide,' : 'show,');
    }
    return sb.toString();
}

CSS:

tr.hide {display:none;}

Answer 2

I've successfully hidden rows by putting a rendered attribute in all the <h:column> tags. The problem is that it suppresses the table headers. You're table has no table headers (they are <f:facet name="header"> tags embedded in the <h:column>), so this approach might work for you.

I ended up using multiple lists in the backing bean, as I needed the table headers.