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 * 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
18 /*
19 * This is not the original file distributed by the Apache Software Foundation
20 * It has been modified by the Hipparchus project
21 */
22
23 package org.hipparchus.linear;
24
25 /**
26 * This is an implementation of {@link UnmodifiableRealVectorAbstractTest} for
27 * unmodifiable views of {@link OpenMapRealVector}.
28 *
29 */
30 public class UnmodifiableOpenMapRealVectorTest
31 extends UnmodifiableRealVectorAbstractTest {
32 /** To ensure sufficient sparsity. */
33 public static final double PROBABILITY_OF_ZERO = 0.5;
34
35 /**
36 * Returns a random vector of type {@link ArrayRealVector}.
37 *
38 * @return a new random {@link ArrayRealVector}.
39 */
40 @Override
41 public RealVector createVector() {
42 OpenMapRealVector v = new OpenMapRealVector(DIM, EPS);
43 for (int i = 0; i < DIM; i++) {
44 if (RANDOM.nextDouble() > PROBABILITY_OF_ZERO) {
45 v.setEntry(i, RANDOM.nextDouble());
46 }
47 }
48 return v;
49 }
50 }