Simon Hunt | 933b1a8 | 2015-05-04 19:07:24 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | * |
| 16 | */ |
| 17 | |
| 18 | package org.onosproject.ui.table; |
| 19 | |
| 20 | /** |
| 21 | * A default cell comparator. Implements a lexicographical compare function |
| 22 | * (i.e. string sorting). Uses the objects' toString() method and then |
| 23 | * compares the resulting strings. Note that null values are acceptable and |
| 24 | * are considered "smaller" than any non-null value. |
| 25 | */ |
| 26 | public class DefaultCellComparator implements CellComparator { |
| 27 | @Override |
| 28 | public int compare(Object o1, Object o2) { |
| 29 | if (o1 == null && o2 == null) { |
| 30 | return 0; // o1 == o2 |
| 31 | } |
| 32 | if (o1 == null) { |
| 33 | return -1; // o1 < o2 |
| 34 | } |
| 35 | if (o2 == null) { |
| 36 | return 1; // o1 > o2 |
| 37 | } |
| 38 | return o1.toString().compareTo(o2.toString()); |
| 39 | } |
| 40 | } |