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  package org.apache.commons.math.analysis;
18  
19  import org.apache.commons.math.FunctionEvaluationException;
20  
21  /**
22   * Wrapper class for counting functions calls.
23   *
24   * @version $Revision: 786927 $ $Date: 2009-06-20 19:37:47 -0400 (Sat, 20 Jun 2009) $ 
25   */
26  public class MonitoredFunction implements UnivariateRealFunction {
27  
28      public MonitoredFunction(UnivariateRealFunction f) {
29          callsCount = 0;
30          this.f = f;
31      }
32  
33      public void setCallsCount(int callsCount) {
34          this.callsCount = callsCount;
35      }
36  
37      public int getCallsCount() {
38          return callsCount;
39      }
40  
41      public double value(double x) throws FunctionEvaluationException {
42          ++callsCount;
43          return f.value(x);
44      }
45  
46      private int callsCount;
47      private UnivariateRealFunction f;
48  
49  }