Script Example: Recursively Collect Values from Custom Attributes

This script recursively collects values of custom attribute contacts from all node parents. Collected values concatenated into single string and separated by semicolons. Duplicate values added only once.

global contacts = "";  // concatenated values will be stored here
global presence = %{ };  // value presence indicator (hash map)

// walk through each parent object for current node
foreach(o : GetObjectParents($node))
{
	add_contacts(o);
}

// Concatenated result is in "contacts" global variable
println "Contacts: " . contacts;

/**
 * Recursively add contacts from object and it's parents
 */
sub add_contacts(curr)
{
	c = GetCustomAttribute(curr, "contacts");
	if ((c != null) && (presence[c] == null))
	{
		if (length(contacts) > 0)
			contacts = contacts . ";" . c;
		else
			contacts = c;
		presence[c] = true;
	}
	
	foreach(o : GetObjectParents(curr))
	{
		add_contacts(o);
	}
}