CODEWITHSUNDEEP
javaxmlfreemarker
horakiel
horakiel

Reputation: 5

FreeMarker : diplay tag on condition without if block

I am looking for a way to avoid using this in a FreeMarker template :

<#if getName()??>
    <Name>getName()</Name>
</#if>

Because I need to test many things.

Is there any way to do it by using, for example, a parameter in the tag? I don't want the tag to be written at all if the value is null. (So exclamation mark is not enough)

Upvotes: 0

Views: 295

Answers (1)

zeppelin
zeppelin

Reputation: 9365

If all your tags follow the same basic structure:

<Tag>value</Tag>

you can use a macro, to save yourself some typing:

<#macro optional tag value=[]>
    <#if value?has_content>
         <${tag}>${value}</${tag}>
    </#if>
</#macro>

and then apply it like this:

  <@optional tag='User' value=user/> 
  <@optional tag='Name' value=name/>

resulting in the following output code:

  <User>myuser</User>
  <Name>myname</User>

if one of the properties is not defined the whole tag will be omitted from the output.

Upvotes: 1

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