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lightning-sunbird  0.9+nobinonly
Histogram.java
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00001 /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
00002  *
00003  * The contents of this file are subject to the Netscape Public
00004  * License Version 1.1 (the "License"); you may not use this file
00005  * except in compliance with the License. You may obtain a copy of
00006  * the License at http://www.mozilla.org/NPL/
00007  *
00008  * Software distributed under the License is distributed on an "AS
00009  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
00010  * implied. See the License for the specific language governing
00011  * rights and limitations under the License.
00012  *
00013  * The Original Code is Mozilla Communicator client code, released
00014  * March 31, 1998.
00015  *
00016  * The Initial Developer of the Original Code is Netscape
00017  * Communications Corporation.  Portions created by Netscape are
00018  * Copyright (C) 1998 Netscape Communications Corporation. All
00019  * Rights Reserved.
00020  *
00021  * Contributor(s):
00022  *
00023  * Patrick C. Beard <beard@netscape.com>
00024  *
00025  * Alternatively, the contents of this file may be used under the
00026  * terms of the GNU Public License (the "GPL"), in which case the
00027  * provisions of the GPL are applicable instead of those above.
00028  * If you wish to allow use of your version of this file only
00029  * under the terms of the GPL and not to allow others to use your
00030  * version of this file under the NPL, indicate your decision by
00031  * deleting the provisions above and replace them with the notice
00032  * and other provisions required by the GPL.  If you do not delete
00033  * the provisions above, a recipient may use your version of this
00034  * file under either the NPL or the GPL.
00035  */
00036 
00037 import java.util.Enumeration;
00038 import java.util.Hashtable;
00039 
00043 public class Histogram {
00044        private static class Bin {
00045               int count = 0;
00046        };
00047 
00048        private Hashtable bins = new Hashtable();
00049        
00050        public void record(Object object) {
00051               Bin bin = (Bin) bins.get(object);
00052               if (bin == null) {
00053                      bin = new Bin();
00054                      bins.put(object, bin);
00055               }
00056               ++bin.count;
00057        }
00058        
00059        public Object[] objects() {
00060               int count = bins.size();
00061               Object[] objects = new Object[count];
00062               Enumeration e = bins.keys();
00063               while (e.hasMoreElements())
00064                      objects[--count] = e.nextElement();
00065               return objects;
00066        }
00067        
00068        public int count(Object object) {
00069               Bin bin = (Bin) bins.get(object);
00070               if (bin != null)
00071                      return bin.count;
00072               else
00073                      return 0;
00074        }
00075 }