Dump Liferay 7 GA4 variables in Freemarker - adapted from James Falkner's original

liferay_dump.ftl

<#attempt>
<#assign black_list = ["class", "request", "getreader", "getinputstream", "writer"] />


<#macro dump key data>
<#if data?is_enumerable>
<p><b>${key}</b>
<@printList data,[] />
<#elseif data?is_hash_ex>
<p><b>${key}</b>
<@printHashEx data,[] />
<#else>
<p><@printItem data?if_exists,[], key, false /></#if>
</#macro>
 

<#macro printList list has_next_array>
<#local counter=0 />
<#list list as item>
<#list has_next_array+[true] as has_next><#if !has_next>    <#else>  | </#if></#list>
<#list has_next_array as has_next><#if !has_next>    <#else>  | </#if></#list><#t>
<#t><@printItem item?if_exists,has_next_array+[item_has_next], counter, false />
<#local counter = counter + 1/>
</#list>
</#macro>
 
<#macro printHashEx hash has_next_array>
= <code>${(hash.data!(hash.toString()))!"No String Representation"}</code>
<ul>Callable methods:
<ul>
<#list hash?keys as key>
<#list has_next_array+[true] as has_next><#if !has_next>    <#else>  | </#if></#list>
<#list has_next_array as has_next><#if !has_next>    <#else>  | </#if></#list><#t>
${key}
</#list>
</ul>
</ul>
</#macro>
 
<#macro printHashExFull hash has_next_array>
<#list hash?keys as key>
<#list has_next_array+[true] as has_next><#if !has_next>    <#else>  | </#if></#list>
<#list has_next_array as has_next><#if !has_next>    <#else>  | </#if></#list><#t>
<#t><#attempt><@printItem hash[key]?if_exists,has_next_array+[key_has_next], key, true /><#recover><pre>${.error}</pre></#recover>
</#list>
</#macro>
 
<#macro printItem item has_next_array key full>
<#if item?is_method>
  +- <b>${key}</b> = ?? (method)
<#elseif item?is_enumerable>
  +- <b>${key}</b>
  <@printList item, has_next_array /><#t>
<#elseif item?is_hash_ex && omit(key?string)><#-- omit bean-wrapped java.lang.Class objects -->
  +- <b>${key}</b> (omitted)
<#elseif item?is_hash_ex>
  +- <b>${key}</b>
  <#if full>
  <@printHashExFull item, has_next_array /><#t>
  <#else>
  <@printHashEx item, has_next_array /><#t>
  </#if>
<#elseif item?is_number>
  +- <b>${key}</b> = <code>${item}</code>
<#elseif item?is_string>
  +- <b>${key}</b> = <code>"${item}"</code>
<#elseif item?is_boolean>
  +- <b>${key}</b> = <code>${item?string}</code>
<#elseif item?is_date>
  +- <b>${key}</b> = <code>${item?string("yyyy-MM-dd HH:mm:ss zzzz")}</code>
<#elseif item?is_transform>
  +- <b>${key}</b> = ?? (transform)
<#elseif item?is_macro>
  +- <b>${key}</b> = ?? (macro)
<#elseif item?is_hash>
  +- <b>${key}</b> = ?? (hash)
<#elseif item?is_node>
  +- <b>${key}</b> = ?? (node)
</#if>
</#macro>
 
 
 
<#function omit key>
    <#local what = key?lower_case>
    <#list black_list as item>
        <#if what?index_of(item) gte 0>
            <#return true>
        </#if>
    </#list>
    <#return false>
</#function>
 
 
 
<h1>All Liferay Variables</h1>
<em>See the bottom for the <code>request</code> variable expansion</em>
<hr>
<#list .data_model?keys as var>
<#if var?index_of("writer") lt 0>
    <@dump var,.data_model[var] />
</#if>
</#list>
<hr>
<h1>The <code>request</code> object</h1>
<pre>

<@printHashExFull request,[] />
</pre>

<#recover>
<pre>
${.error}
</pre>
</#recover>

Great Job!
I've tryied to insert these script inside a freemarker portlet, but it breaks at line 108 reporting the following error:

hen calling macro "printHashExFull", required parameter "hash" (parameter #1) was specified, but had null/missing value.

----
Tip: If the parameter value expression on the caller side is known to be legally null/missing, you may want to specify a default value for it with the "!" operator, like paramValue!defaultValue.
----

If I comment out that line, the script works...so: how to make request variable available in that context?

A way I found to get it work is substituting line 108 with

<@printHashExFull themeDisplay.getRequest(), [] />

even if the printed object is really huge!