Question

How do I create a sorted map or tree map in velocity templates using liferay?

I am creating a velocity template in liferay portal. I use a HashMap to store some key/value pairs.

I am creating a HashMap like this

#set ($myHashMap = {
    'key1': 'value1;',
    'key2': 'value2;',
    'key3': 'value3;',
})

and I access the hashmap using

$myHashMap.get('key1')

I want to iterate over my hashmap and print all the key/value pairs.

But since the ordering is not maintained in HashMap, I want to use a TreeMap/SortedMap. I am new to velocity templates. Also, I know how to do it in java, but unfortunately the glitch is I have to find a work around in velocity templates.

Answer 1

AFAIK you can’t create it directly in the template. The closest thing would be to create a Map and a ArrayList of keys and iterate the latter while taking values from the former.

Of course another solution is to pass a TreeMap/SortedMap created in java to the template and iterate it’s keySet