/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.mahout.cf.taste.impl.common;
/**
* Adds notion of iterating over {@code long} primitives in the style of an {@link java.util.Iterator} -- as
* opposed to iterating over {@link Long}. Implementations of this interface however also implement
* {@link java.util.Iterator} and {@link Iterable} over {@link Long} for convenience.
*/
public interface LongPrimitiveIterator extends SkippingIterator<Long> {
/**
* @return next {@code long} in iteration
* @throws java.util.NoSuchElementException
* if no more elements exist in the iteration
*/
long nextLong();
/**
* @return next {@code long} in iteration without advancing iteration
*/
long peek();
}