[NETBEANS-1937] Import on code paste error

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 10.0
• Component/s: java - Source
• Labels: pull-request-available

Environment

Mac
JDK 10

• Assignee: Jan Lahoda
• Reporter: Austin Stephens
• Created: 15/Jan/19 19:34
• Updated: 05/Feb/21 21:10
• Resolved: 02/Jan/21 20:06

Description

Create a class file named "IterableUtil.java" and paste the following into the class:

 

    @Deprecated
    public static <T> Iterable<T> cast(final Iterable<?> source){
        return () -> new Iterator<T>() {
            final Iterator<?> iterator = source.iterator();
            @Override
            public boolean hasNext() {
                return iterator.hasNext();
            }
            
            @Override
            @SuppressWarnings("unchecked")
            public T next() {
                return (T)iterator.next();
            }

            @Override
            public void remove() {
                iterator.remove();
            }
        };
    }

    public static <T,E> ListIterator<T> cast(final ListIterator<E> source,
            final Class<E> clazz){
        return new ListIterator<T>() {

            @Override
            public boolean hasNext() {
                return source.hasNext();
            }

            @Override
            @SuppressWarnings("unchecked")
            public T next() {
                return (T)source.next();
            }

            @Override
            public boolean hasPrevious() {
                return source.hasPrevious();
            }

            @Override
            @SuppressWarnings("unchecked")
            public T previous() {
                return (T)source.previous();
            }

            @Override
            public int nextIndex() {
                return source.nextIndex();
            }

            @Override
            public int previousIndex() {
                return source.nextIndex();
            }

            @Override
            public void remove() {
                source.remove();
            }

            @Override
            public void set(T e) {
                source.set(clazz.cast(e));
            }

            @Override
            public void add(T e) {
                source.add(clazz.cast(e));
            }
        };
    }
    
    /**
     *
     * @param <T>
     * @param collection
     * @return
     * @deprecated Does not truly do the conversion.
     */
    @Deprecated
    public static <T> Iterable<T> enumerationToIterable(final Enumeration<T> collection){
        return () -> enumerationToIterator(collection);
    }

    public static <T> Iterator<T> enumerationToIterator(
            final Enumeration<T> collection) {
        return new Iterator<T>() {

            @Override
            public boolean hasNext() {
                return collection.hasMoreElements();
            }

            @Override
            public T next() {
                return collection.nextElement();
            }

            @Override
            public void remove() {
                throw new UnsupportedOperationException("Not supported."); //To change body of generated methods, choose Tools | Templates.
            }
        };
    }

The IDE will ask if you would like it to resolve imports. Click "ok". The resulting code will now have `return new IteratorIterator<T>(){` and `return new ListIteratorListIterator<T>() {`, which is wrong.

 

Issue Links

• links to: GitHub Pull Request #1238