1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.math4.legacy.ml.clustering;
19
20 import java.util.Arrays;
21
22 /**
23 * A simple implementation of {@link Clusterable} for points with double coordinates.
24 * @since 3.2
25 */
26 public class DoublePoint implements Clusterable {
27 /** Point coordinates. */
28 private final double[] point;
29
30 /**
31 * Build an instance wrapping an double array.
32 * <p>
33 * The wrapped array is referenced, it is <em>not</em> copied.
34 *
35 * @param point the n-dimensional point in double space
36 */
37 public DoublePoint(final double[] point) {
38 this.point = point;
39 }
40
41 /**
42 * Build an instance wrapping an integer array.
43 * <p>
44 * The wrapped array is copied to an internal double array.
45 *
46 * @param point the n-dimensional point in integer space
47 */
48 public DoublePoint(final int[] point) {
49 this.point = new double[point.length];
50 for ( int i = 0; i < point.length; i++) {
51 this.point[i] = point[i];
52 }
53 }
54
55 /** {@inheritDoc} */
56 @Override
57 public double[] getPoint() {
58 return point;
59 }
60
61 /** {@inheritDoc} */
62 @Override
63 public boolean equals(final Object other) {
64 if (!(other instanceof DoublePoint)) {
65 return false;
66 }
67 return Arrays.equals(point, ((DoublePoint) other).point);
68 }
69
70 /** {@inheritDoc} */
71 @Override
72 public int hashCode() {
73 return Arrays.hashCode(point);
74 }
75
76 /** {@inheritDoc} */
77 @Override
78 public String toString() {
79 return Arrays.toString(point);
80 }
81 }