public Iterator getIterator()

in velocity-engine-core/src/main/java/org/apache/velocity/util/introspection/UberspectImpl.java [206:278]
65 lines of code
10 McCabe index (conditional complexity)

    public Iterator getIterator(Object obj, Info i)
    {
        if (obj.getClass().isArray())
        {
            return new ArrayIterator(obj);
        }
        else if (obj instanceof Iterable)
        {
            return ((Iterable) obj).iterator();
        }
        else if (obj instanceof Map)
        {
            return ((Map) obj).values().iterator();
        }
        else if (obj instanceof Iterator)
        {
            log.debug("The iterative object in the #foreach() loop at {}" +
                      " is of type java.util.Iterator.  Because " +
                      "it is not resettable, if used in more than once it " +
                      "may lead to unexpected results.", i);
            return ((Iterator) obj);
        }
        else if (obj instanceof Enumeration)
        {
            log.debug("The iterative object in the #foreach() loop at {}" +
                      " is of type java.util.Enumeration.  Because " +
                      "it is not resettable, if used in more than once it " +
                      "may lead to unexpected results.", i);
            return new EnumerationIterator((Enumeration) obj);
        }
        else
        {
            // look for an iterator() method to support the JDK5 Iterable
            // interface or any user tools/DTOs that want to work in
            // foreach without implementing the Collection interface
            Class<?> type = obj.getClass();
            try
            {
                Method iter = type.getMethod("iterator");
                Class<?> returns = iter.getReturnType();
                if (Iterator.class.isAssignableFrom(returns))
                {
                    try
                    {
                        return (Iterator)iter.invoke(obj);
                    }
                    catch (IllegalAccessException e)
                    {
                        // Cannot invoke this method, just give up
                    }
                    catch (Exception e)
                    {
                        throw new VelocityException("Error invoking the method 'iterator' on class '"
                            + obj.getClass().getName() +"'", e, rsvc.getLogContext().getStackTrace());
                    }
                }
                else
                {
                    log.debug("iterator() method of reference in #foreach loop at " +
                              "{} does not return a true Iterator.", i);
                }
            }
            catch (NoSuchMethodException nsme)
            {
                // eat this one, but let all other exceptions thru
            }
        }

        /*  we have no clue what this is  */
        log.debug("Could not determine type of iterator in #foreach loop at {}", i);

        return null;
    }