| /* |
| * 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.chemistry.opencmis.client.runtime.util; |
| |
| import java.util.List; |
| |
| import org.apache.chemistry.opencmis.client.runtime.util.AbstractPageFetcher.Page; |
| |
| /** |
| * Iterator for iterating over all items in a CMIS Collection. |
| * |
| * @param <T> |
| */ |
| public class CollectionIterator<T> extends AbstractIterator<T> { |
| |
| /** |
| * Construct |
| * |
| * @param skipCount |
| * @param pageFetcher |
| */ |
| public CollectionIterator(long skipCount, AbstractPageFetcher<T> pageFetcher) { |
| super(skipCount, pageFetcher); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.util.Iterator#hasNext() |
| */ |
| public boolean hasNext() { |
| Page<T> page = getCurrentPage(); |
| if (page == null) { |
| return false; |
| } |
| |
| List<T> items = page.getItems(); |
| if (items != null && getSkipOffset() < items.size()) { |
| return true; |
| } |
| |
| if (!getHasMoreItems()) { |
| return false; |
| } |
| |
| long totalItems = getTotalNumItems(); |
| if (totalItems < 0) { |
| // we don't know better |
| return true; |
| } |
| |
| return (getSkipCount() + getSkipOffset()) < totalItems; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.util.Iterator#next() |
| */ |
| public T next() { |
| Page<T> page = getCurrentPage(); |
| if (page == null) { |
| return null; |
| } |
| |
| List<T> items = page.getItems(); |
| if (items == null || items.isEmpty()) { |
| return null; |
| } |
| |
| if (getSkipOffset() == items.size()) { |
| page = incrementPage(); |
| items = page == null ? null : page.getItems(); |
| } |
| |
| if (items == null || items.isEmpty() || getSkipOffset() == items.size()) { |
| return null; |
| } |
| |
| return items.get(incrementSkipOffset()); |
| } |
| |
| } |