001/* 002 * Copyright 2014 Alex Kasko (alexkasko.com) 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package com.alexkasko.unsafe.offheap; 018 019import java.util.Iterator; 020 021/** 022 * Interface for iterators over off-heap collections those can be disposed manually 023 * 024 * @author alexkasko 025 * Date: 11/29/13 026 */ 027public interface OffHeapDisposableIterator<T> extends Iterator<T>, OffHeapDisposable { 028 /** 029 * Optional method, should return size of the underlying collections, 030 * if such size is known on iterator creation or {@code -1} otherwise 031 * 032 * @return number of elements in iterator 033 */ 034 long size(); 035}