gecko-dev/gc/boehm/leaksoup/Histogram.java

76 строки
2.3 KiB
Java

/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Patrick C. Beard <beard@netscape.com>
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License (the "GPL"), in which case the
* provisions of the GPL are applicable instead of those above.
* If you wish to allow use of your version of this file only
* under the terms of the GPL and not to allow others to use your
* version of this file under the NPL, indicate your decision by
* deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the NPL or the GPL.
*/
import java.util.Enumeration;
import java.util.Hashtable;
/**
* Provides a simple way to tally the occurrence of unique objects.
*/
public class Histogram {
private static class Bin {
int count = 0;
};
private Hashtable bins = new Hashtable();
public void record(Object object) {
Bin bin = (Bin) bins.get(object);
if (bin == null) {
bin = new Bin();
bins.put(object, bin);
}
++bin.count;
}
public Object[] objects() {
int count = bins.size();
Object[] objects = new Object[count];
Enumeration e = bins.keys();
while (e.hasMoreElements())
objects[--count] = e.nextElement();
return objects;
}
public int count(Object object) {
Bin bin = (Bin) bins.get(object);
if (bin != null)
return bin.count;
else
return 0;
}
}