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 org.graalvm.compiler.debug.internal;
  24 
  25 import java.util.ArrayList;
  26 import java.util.Collections;
  27 import java.util.HashMap;
  28 import java.util.List;
  29 
  30 import org.graalvm.compiler.debug.DebugHistogram;
  31 
  32 public class DebugHistogramImpl implements DebugHistogram {
  33 
  34     private final String name;
  35     private HashMap<Object, CountedValue> map = new HashMap<>();
  36 
  37     public DebugHistogramImpl(String name) {
  38         this.name = name;
  39     }
  40 
  41     @Override
  42     public void add(Object value) {
  43         CountedValue cv = map.get(value);
  44         if (cv == null) {
  45             map.put(value, new CountedValue(1, value));
  46         } else {
  47             cv.inc();
  48         }
  49     }
  50 
  51     @Override
  52     public void add(Object value, long count) {
  53         CountedValue cv = map.get(value);
  54         if (cv == null) {
  55             map.put(value, new CountedValue(count, value));
  56         } else {
  57             cv.add(count);
  58         }
  59     }
  60 
  61     @Override
  62     public String getName() {
  63         return name;
  64     }
  65 
  66     @Override
  67     public List<CountedValue> getValues() {
  68         ArrayList<CountedValue> res = new ArrayList<>(map.values());
  69         Collections.sort(res);
  70         return res;
  71     }
  72 }