| /* |
| * 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.ignite.internal.processors.cache; |
| |
| import java.util.Iterator; |
| import org.apache.ignite.cache.query.QueryCursor; |
| |
| /** |
| * Implementation of iterator wrapper to close cursor when all data has been read from iterator. |
| * |
| * @param <T> The type of elements returned by this iterator. |
| */ |
| class AutoClosableCursorIterator<T> implements Iterator<T> { |
| /** Cursor. */ |
| private final QueryCursor cursor; |
| |
| /** Iterator. */ |
| private final Iterator<T> iter; |
| |
| /** |
| * Constructor. |
| * |
| * @param cursor Query cursor. |
| * @param iter Wrapped iterator. |
| */ |
| public AutoClosableCursorIterator(QueryCursor cursor, Iterator<T> iter) { |
| this.cursor = cursor; |
| this.iter = iter; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public boolean hasNext() { |
| boolean hasNext = iter.hasNext(); |
| |
| if (!hasNext) |
| cursor.close(); |
| |
| return hasNext; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public T next() { |
| return iter.next(); |
| } |
| } |