Mercurial > hg > truffle
comparison graal/com.oracle.jvmci.debug/src/com/oracle/jvmci/debug/DebugHistogram.java @ 21554:b1530a6cce8c
renamed com.oracle.graal.[debug|options|hotspotvmconfig]* modules to com.oracle.jvmci.[debug|options|hotspotvmconfig]* modules (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 26 May 2015 23:21:15 +0200 |
parents | graal/com.oracle.graal.debug/src/com/oracle/graal/debug/DebugHistogram.java@cda2a7d1dcff |
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21553:0910a9497b02 | 21554:b1530a6cce8c |
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1 /* | |
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 */ | |
23 package com.oracle.jvmci.debug; | |
24 | |
25 import java.util.*; | |
26 | |
27 /** | |
28 * Facility for recording value frequencies. | |
29 */ | |
30 public interface DebugHistogram { | |
31 | |
32 /** | |
33 * Gets the name specified when this objected was {@linkplain Debug#createHistogram(String) | |
34 * created}. | |
35 */ | |
36 String getName(); | |
37 | |
38 /** | |
39 * Increments the count for a given value. | |
40 */ | |
41 void add(Object value); | |
42 | |
43 void add(Object value, long count); | |
44 | |
45 /** | |
46 * A value and a frequency. The ordering imposed by {@link #compareTo(CountedValue)} places | |
47 * values with higher frequencies first. | |
48 */ | |
49 public class CountedValue implements Comparable<CountedValue> { | |
50 | |
51 private long count; | |
52 private final Object value; | |
53 | |
54 public CountedValue(long count, Object value) { | |
55 this.count = count; | |
56 this.value = value; | |
57 } | |
58 | |
59 public int compareTo(CountedValue o) { | |
60 if (count < o.count) { | |
61 return 1; | |
62 } else if (count > o.count) { | |
63 return -1; | |
64 } | |
65 return 0; | |
66 } | |
67 | |
68 @Override | |
69 public String toString() { | |
70 return count + " -> " + value; | |
71 } | |
72 | |
73 public void inc() { | |
74 count++; | |
75 } | |
76 | |
77 public void add(long n) { | |
78 count += n; | |
79 } | |
80 | |
81 public long getCount() { | |
82 return count; | |
83 } | |
84 | |
85 public Object getValue() { | |
86 return value; | |
87 } | |
88 } | |
89 | |
90 /** | |
91 * Gets a list of the counted values, sorted in descending order of frequency. | |
92 */ | |
93 List<CountedValue> getValues(); | |
94 | |
95 /** | |
96 * Interface for a service that can render a visualization of a histogram. | |
97 */ | |
98 public interface Printer { | |
99 | |
100 void print(DebugHistogram histogram); | |
101 } | |
102 } |