| /* |
| * Copyright 2017 HugeGraph Authors |
| * |
| * 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 com.baidu.hugegraph.computer.core.sort.sorter; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import com.baidu.hugegraph.computer.core.sort.sorting.InputsSorting; |
| import com.baidu.hugegraph.computer.core.sort.sorting.SortingFactory; |
| import com.baidu.hugegraph.computer.core.store.hgkvfile.entry.KvEntry; |
| import com.baidu.hugegraph.computer.core.store.hgkvfile.buffer.EntryIterator; |
| |
| public class InputsSorterImpl implements InputsSorter { |
| |
| @Override |
| public EntryIterator sort(List<EntryIterator> entries) throws IOException { |
| return new SortingEntries(entries); |
| } |
| |
| private static class SortingEntries implements EntryIterator { |
| |
| private final InputsSorting<KvEntry> inputsSorting; |
| private final List<EntryIterator> sources; |
| private boolean closed; |
| |
| public SortingEntries(List<EntryIterator> sources) { |
| this.sources = sources; |
| this.inputsSorting = SortingFactory.createSorting(sources); |
| this.closed = false; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return this.inputsSorting.hasNext(); |
| } |
| |
| @Override |
| public KvEntry next() { |
| return this.inputsSorting.next(); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| if (this.closed) { |
| return; |
| } |
| for (EntryIterator source : this.sources) { |
| source.close(); |
| } |
| this.closed = true; |
| } |
| } |
| } |