public static Iterator getIterator()

in velocity-tools-generic/src/main/java/org/apache/velocity/tools/ClassUtils.java [445:487]

• 40 lines of code
• 8 McCabe index (conditional complexity)

    public static Iterator getIterator(Object obj)
        throws NoSuchMethodException, IllegalAccessException, InvocationTargetException
    {
        if (obj.getClass().isArray())
        {
            return new ArrayIterator(obj);
        }
        else if (obj instanceof Collection)
        {
            return ((Collection) obj).iterator();
        }
        else if (obj instanceof Map)
        {
            return ((Map) obj).values().iterator();
        }
        else if (obj instanceof Iterator)
        {
            return ((Iterator) obj);
        }
        else if (obj instanceof Iterable)
        {
            return ((Iterable)obj).iterator();
        }
        else if (obj instanceof Enumeration)
        {
            return new EnumerationIterator((Enumeration) obj);
        }
        else
        {
            // look for an iterator() method to support
            // any user tools/DTOs that want to work in
            // foreach w/o implementing the Collection interface
            Method iter = obj.getClass().getMethod("iterator");
            if (Iterator.class.isAssignableFrom(iter.getReturnType()))
            {
                return (Iterator)iter.invoke(obj);
            }
            else
            {
                return null;
            }
        }
    }