1 /*
2 * Licensed to the Hipparchus project 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 Hipparchus project 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 * https://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 package org.hipparchus.linear;
18
19 import org.hipparchus.complex.Complex;
20
21 /** Container for index and eigenvalue pair.
22 * @since 3.0
23 */
24 class IndexedEigenvalue {
25
26 /** Index in the diagonal matrix. */
27 private int index;
28
29 /** Eigenvalue. */
30 private final Complex eigenValue;
31
32 /** Build the container from its fields.
33 * @param index index in the diagonal matrix
34 * @param eigenvalue eigenvalue
35 */
36 IndexedEigenvalue(final int index, final Complex eigenvalue) {
37 this.index = index;
38 this.eigenValue = eigenvalue;
39 }
40
41 /** Get the index in the diagonal matrix.
42 * @return index in the diagonal matrix
43 */
44 public int getIndex() {
45 return index;
46 }
47
48 /** Set the index in the diagonal matrix.
49 * @param index new index in the diagonal matrix
50 */
51 public void setIndex(final int index) {
52 this.index = index;
53 }
54
55 /** Get the eigenvalue.
56 * @return eigenvalue
57 */
58 public Complex getEigenvalue() {
59 return eigenValue;
60 }
61
62 /** {@inheritDoc} */
63 @Override
64 public boolean equals(final Object other) {
65
66 if (this == other) {
67 return true;
68 }
69
70 if (other instanceof IndexedEigenvalue) {
71 final IndexedEigenvalue rhs = (IndexedEigenvalue) other;
72 return eigenValue.equals(rhs.eigenValue);
73 }
74
75 return false;
76
77 }
78
79 /**
80 * Get a hashCode for the pair.
81 * @return a hash code value for this object
82 */
83 @Override
84 public int hashCode() {
85 return 4563 + index + eigenValue.hashCode();
86 }
87
88 }