1 /**
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that the following conditions are
4 * met :
5 *
6 * . Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 *
9 * . Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * . The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 package cppncss.measure;
30
31 import java.util.ArrayList;
32 import java.util.List;
33
34 /**
35 * Collects averages of measures.
36 *
37 * @author Mathieu Champlon
38 */
39 public final class AverageCollector implements Collector
40 {
41 private final List<Average> result = new ArrayList<Average>();;
42 private final AverageObserver observer;
43
44 /**
45 * Create an average collector.
46 *
47 * @param observer an observer to be notified of the results
48 */
49 public AverageCollector( final AverageObserver observer )
50 {
51 if( observer == null )
52 throw new IllegalArgumentException( "argument 'observer' is null" );
53 this.observer = observer;
54 }
55
56 /**
57 * {@inheritDoc}
58 */
59 public void notify( final String label, final String item, final int line, final int count )
60 {
61 if( !update( label, count ) )
62 result.add( new Average( label, count ) );
63 }
64
65 private boolean update( final String label, final int count )
66 {
67 for( Average average : result )
68 if( average.update( label, count ) )
69 return true;
70 return false;
71 }
72
73 /**
74 * {@inheritDoc}
75 */
76 public void changed( final String filename )
77 {
78 }
79
80 /**
81 * {@inheritDoc}
82 */
83 public void flush()
84 {
85 for( Average average : result )
86 average.accept( observer );
87 }
88 }