View Javadoc
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  }