1 /*
2 * Copyright 2011-2020 the original author or authors.
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 * https://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 package org.springframework.data.geo;
17
18 /**
19 * Commonly used {@link Metric}s.
20 *
21 * @author Oliver Gierke
22 * @author Thomas Darimont
23 * @since 1.8
24 */
25 public enum Metrics implements Metric {
26
27 KILOMETERS(6378.137, "km"), MILES(3963.191, "mi"), NEUTRAL(1, "");
28
29 private final double multiplier;
30 private final String abbreviation;
31
32 /**
33 * Creates a new {@link Metrics} using the given multiplier.
34 *
35 * @param multiplier the earth radius at equator, must not be {@literal null}.
36 * @param abbreviation the abbreviation to use for this {@link Metric}, must not be {@literal null}.
37 */
38 private Metrics(double multiplier, String abbreviation) {
39
40 this.multiplier = multiplier;
41 this.abbreviation = abbreviation;
42 }
43
44 /*
45 * (non-Javadoc)
46 * @see org.springframework.data.mongodb.core.geo.Metric#getMultiplier()
47 */
48 public double getMultiplier() {
49 return multiplier;
50 }
51
52 /*
53 * (non-Javadoc)
54 * @see org.springframework.data.geo.Metric#getAbbreviation()
55 */
56 @Override
57 public String getAbbreviation() {
58 return abbreviation;
59 }
60 }
61