| /* |
| * 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.sorting; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import com.baidu.hugegraph.computer.core.common.exception.ComputerException; |
| |
| public class SortingFactory { |
| |
| private static final SortingMode MODE = SortingMode.LOSER_TREE; |
| |
| public static <T> InputsSorting<T> createSorting( |
| List<? extends Iterator<T>> inputs, |
| SortingMode mode) { |
| switch (mode) { |
| case HEAP: |
| return createHeapSorting(inputs); |
| case LOSER_TREE: |
| return createLoserTreeSorting(inputs); |
| default: |
| throw new ComputerException("Can't create sorting for '%s'", |
| mode); |
| } |
| } |
| |
| public static <T> InputsSorting<T> createSorting( |
| List<? extends Iterator<T>> inputs) { |
| return createSorting(inputs, MODE); |
| } |
| |
| private static <T> InputsSorting<T> createLoserTreeSorting( |
| List<? extends Iterator<T>> inputs) { |
| return new LoserTreeInputsSorting<>(inputs); |
| } |
| |
| private static <T> InputsSorting<T> createHeapSorting( |
| List<? extends Iterator<T>> inputs) { |
| return new HeapInputsSorting<>(inputs); |
| } |
| } |