/**
* Return all groups starting with the passed in prefix.
*
* @param start The start of a groups you want to match.
* @return A collection of groups that match the passed string.
*/
public Collection<FunctionGroup> getGroupsStartingWith(String start) {
if (start.length() == 0) {
return groupTree;
}
start = start.toLowerCase();
if (start.length() > maxGroupLength) return new TreeSet<FunctionGroup>();
try {
// Uses tree subset to find the groups greater than start or less than
return groupTree.subSet(new FunctionGroup(start), new FunctionGroup(getSearchLimit(start)));
} catch (IllegalArgumentException e) {
ZDebug.printStackTrace(e, "Invalid search limit");
}
return new TreeSet<FunctionGroup>();
}
