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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  package org.hipparchus.optim.linear;
23  
24  import org.hipparchus.optim.OptimizationData;
25  
26  /**
27   * A constraint for a linear optimization problem indicating whether all
28   * variables must be restricted to non-negative values.
29   *
30   */
31  public class NonNegativeConstraint implements OptimizationData {
32      /** Whether the variables are all positive. */
33      private final boolean isRestricted;
34  
35      /** Simple constructor.
36       * @param restricted If {@code true}, all the variables must be positive.
37       */
38      public NonNegativeConstraint(boolean restricted) {
39          isRestricted = restricted;
40      }
41  
42      /**
43       * Indicates whether all the variables must be restricted to non-negative
44       * values.
45       *
46       * @return {@code true} if all the variables must be positive.
47       */
48      public boolean isRestrictedToNonNegative() {
49          return isRestricted;
50      }
51  }