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  * fb-contrib - Auxiliary detectors for Java programs
  * Copyright (C) 2005-2015 Dave Brosius
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
package com.mebigfatguy.fbcontrib.utils;
a collection of static methods for determining if a class belongs to one or more collection types.
public class CollectionUtils {
    private static JavaClass LIST_CLASS = null;
    private static JavaClass SET_CLASS = null;
    private static JavaClass MAP_CLASS = null;
    static {
        try {
             = Repository.lookupClass("java/util/List");
             = Repository.lookupClass("java/util/Set");
             = Repository.lookupClass("java/util/Map");
        } catch (ClassNotFoundException cnfe) {
private to reinforce the helper status of the class
    private CollectionUtils() {       

determines if the current class name is derived from List, Set or Map

clsName the class to determine it's parentage
if the class is a List, Set or Map
java.lang.ClassNotFoundException if the cls parameter can't be found
    public static boolean isListSetMap(String clsNamethrows ClassNotFoundException {
        JavaClass cls = Repository.lookupClass(clsName);
        return (cls.implementationOf() || cls.implementationOf() || cls.implementationOf());
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