| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| EdgeFactory |
|
| 1.4;1.4 |
| 1 | /* | |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one | |
| 3 | * or more contributor license agreements. See the NOTICE file | |
| 4 | * distributed with this work for additional information | |
| 5 | * regarding copyright ownership. The ASF licenses this file | |
| 6 | * to you under the Apache License, Version 2.0 (the | |
| 7 | * "License"); you may not use this file except in compliance | |
| 8 | * with the License. You may obtain a copy of the License at | |
| 9 | * | |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 11 | * | |
| 12 | * Unless required by applicable law or agreed to in writing, software | |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 15 | * See the License for the specific language governing permissions and | |
| 16 | * limitations under the License. | |
| 17 | */ | |
| 18 | ||
| 19 | package org.apache.giraph.edge; | |
| 20 | ||
| 21 | import org.apache.hadoop.io.NullWritable; | |
| 22 | import org.apache.hadoop.io.Writable; | |
| 23 | import org.apache.hadoop.io.WritableComparable; | |
| 24 | ||
| 25 | /** | |
| 26 | * Factory for creating Edges | |
| 27 | */ | |
| 28 | public class EdgeFactory { | |
| 29 | /** Do not construct */ | |
| 30 | 0 | private EdgeFactory() { } |
| 31 | ||
| 32 | /** | |
| 33 | * Create an edge pointing to a given ID with a value | |
| 34 | * | |
| 35 | * @param id target ID | |
| 36 | * @param value edge value | |
| 37 | * @param <I> Vertex ID type | |
| 38 | * @param <E> Edge Value type | |
| 39 | * @return Edge pointing to ID with value | |
| 40 | */ | |
| 41 | public static <I extends WritableComparable, | |
| 42 | E extends Writable> | |
| 43 | Edge<I, E> create(I id, E value) { | |
| 44 | 0 | return createReusable(id, value); |
| 45 | } | |
| 46 | ||
| 47 | /** | |
| 48 | * Create an edge pointing to a given ID without a value | |
| 49 | * | |
| 50 | * @param id target ID | |
| 51 | * @param <I> Vertex ID type | |
| 52 | * @return Edge pointing to ID without a value | |
| 53 | */ | |
| 54 | public static <I extends WritableComparable> | |
| 55 | Edge<I, NullWritable> create(I id) { | |
| 56 | 0 | return createReusable(id); |
| 57 | } | |
| 58 | ||
| 59 | /** | |
| 60 | * Create a reusable edge pointing to a given ID with a value | |
| 61 | * | |
| 62 | * @param id target ID | |
| 63 | * @param value edge value | |
| 64 | * @param <I> Vertex ID type | |
| 65 | * @param <E> Edge Value type | |
| 66 | * @return Edge pointing to ID with value | |
| 67 | */ | |
| 68 | public static <I extends WritableComparable, | |
| 69 | E extends Writable> | |
| 70 | ReusableEdge<I, E> createReusable(I id, E value) { | |
| 71 | 0 | if (value instanceof NullWritable) { |
| 72 | 0 | return (ReusableEdge<I, E>) createReusable(id); |
| 73 | } else { | |
| 74 | 0 | return new DefaultEdge<I, E>(id, value); |
| 75 | } | |
| 76 | } | |
| 77 | ||
| 78 | /** | |
| 79 | * Create a reusable edge pointing to a given ID with a value | |
| 80 | * | |
| 81 | * @param id target ID | |
| 82 | * @param <I> Vertex ID type | |
| 83 | * @return Edge pointing to ID with value | |
| 84 | */ | |
| 85 | public static <I extends WritableComparable> | |
| 86 | ReusableEdge<I, NullWritable> createReusable(I id) { | |
| 87 | 0 | return new EdgeNoValue<I>(id); |
| 88 | } | |
| 89 | } |