| /* |
| * 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.commons.compress.utils; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.Objects; |
| |
| /** |
| * Iterator utilities. |
| * |
| * @since 1.13. |
| */ |
| public class Iterators { |
| |
| /** |
| * Adds all the elements in the source {@code iterator} to the target |
| * {@code collection}. |
| * |
| * <p> |
| * When this method returns, the {@code iterator} will be "empty": its |
| * {@code hasNext()} method returns {@code false}. |
| * </p> |
| * |
| * @param <T> type of the elements contained inside the collection |
| * @param collection target collection |
| * @param iterator source |
| * @return {@code true} if the target {@code collection} was modified as a |
| * result of this operation |
| */ |
| public static <T> boolean addAll(final Collection<T> collection, final Iterator<? extends T> iterator) { |
| Objects.requireNonNull(collection); |
| Objects.requireNonNull(iterator); |
| boolean wasModified = false; |
| while (iterator.hasNext()) { |
| wasModified |= collection.add(iterator.next()); |
| } |
| return wasModified; |
| } |
| |
| private Iterators() { |
| // do not instantiate |
| } |
| |
| } |