| /* |
| * 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 org.apache.chemistry.opencmis.client.api.ItemIterable; |
| |
| /** |
| * Abstract <code>ItemIterable</code> implementation. |
| * |
| * @param <T> the type returned by the iterable's iterator |
| */ |
| public abstract class AbstractIterable<T> implements ItemIterable<T> { |
| |
| private final AbstractPageFetcher<T> pageFetcher; |
| private final long skipCount; |
| private AbstractIterator<T> iterator; |
| |
| protected AbstractIterable(AbstractPageFetcher<T> pageFetcher) { |
| this(0, pageFetcher); |
| } |
| |
| protected AbstractIterable(long position, AbstractPageFetcher<T> pageFetcher) { |
| this.pageFetcher = pageFetcher; |
| this.skipCount = position; |
| } |
| |
| /** |
| * Gets the skip count |
| * |
| * @return skip count |
| */ |
| protected long getSkipCount() { |
| return skipCount; |
| } |
| |
| /** |
| * Gets the page fetcher |
| * |
| * @return page fetcher |
| */ |
| protected AbstractPageFetcher<T> getPageFetcher() { |
| return pageFetcher; |
| } |
| |
| /** |
| * Construct the iterator |
| * |
| * @return iterator |
| */ |
| protected abstract AbstractIterator<T> createIterator(); |
| |
| public AbstractIterator<T> iterator() { |
| return getIterator(); |
| } |
| |
| public ItemIterable<T> skipTo(long position) { |
| return new CollectionIterable<T>(position, pageFetcher); |
| } |
| |
| public ItemIterable<T> getPage() { |
| return new CollectionPageIterable<T>(skipCount, pageFetcher); |
| } |
| |
| public ItemIterable<T> getPage(int maxNumItems) { |
| this.pageFetcher.setMaxNumItems(maxNumItems); |
| return new CollectionPageIterable<T>(skipCount, pageFetcher); |
| } |
| |
| public long getPageNumItems() { |
| return getIterator().getPageNumItems(); |
| } |
| |
| public boolean getHasMoreItems() { |
| return getIterator().getHasMoreItems(); |
| } |
| |
| public long getTotalNumItems() { |
| return getIterator().getTotalNumItems(); |
| } |
| |
| private AbstractIterator<T> getIterator() { |
| if (this.iterator == null) { |
| this.iterator = createIterator(); |
| } |
| return this.iterator; |
| } |
| } |
| |