Examples with NiceIterator org.apache.jena.util.iterator.NiceIterator used on opensource projects

Example 1 with NiceIterator

use of org.apache.jena.util.iterator.NiceIterator in project jena by apache.

the class ArrayBunch method iterator.

@Override
public ExtendedIterator<Triple> iterator(final HashCommon.NotifyEmpty container) {
    //        System.err.println( ">> (done)" );
    return new NiceIterator<Triple>() {

        protected final int initialChanges = changes;

        protected int i = size;

        protected final Triple[] e = elements;

        @Override
        public boolean hasNext() {
            if (changes > initialChanges)
                throw new ConcurrentModificationException();
            return i > 0;
        }

        @Override
        public Triple next() {
            if (changes > initialChanges)
                throw new ConcurrentModificationException();
            if (i == 0)
                noElements("no elements left in ArrayBunch iteration");
            return e[--i];
        }

        @Override
        public void remove() {
            if (changes > initialChanges)
                throw new ConcurrentModificationException();
            //                System.err.println( ">> ArrayBunch.iterator::remove" );
            //                System.err.println( "++  size currently " + size );
            //                System.err.println( "++  container is " + container );
            //                System.err.println( "++  selector currently " + i + " (triple " + e[i] + ")" );
            int last = --size;
            e[i] = e[last];
            e[last] = null;
            if (size == 0)
                container.emptied();
        //                System.err.println( "++  post remove, triples are:" );
        //                for (int j = 0; j < size; j += 1) System.err.println( "==    " + e[j] );
        }
    };
}