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javafreemarker

Freemarker function with parameter that can be empty

I created function in Freemarker:

<#function formatDate anyDate>
    <#assign dateFormat = read_from_configuration() />
    <#if anyDate??>
        <#return anyDate?date(dateFormat) />
    <#else >
        <#return '' />
    </#if>
</#function>

I call it like this: ${formatDate(object.someDate)}.

It all works until someDate is null. In that case I get exception:

Error executing macro: formatDate
required parameter: anyDate is not specified.

How can I do this? I want the function to work if parameter values is null.

Solution

  • In the end I did it like this:

    <#function formatDate anyDate='notSet'>
    <#assign dateFormat = read_from_configuration() />
    <#if anyDate?is_date>
        <#return anyDate?string(dateFormat) />
    <#else >
        <#return '' />
    </#if>
</#function>