1 /*
   2  * $Id$
   3  *
   4  * Copyright (c) 2001, 2009, Oracle and/or its affiliates. All rights reserved.
   5  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   6  *
   7  * This code is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 only, as
   9  * published by the Free Software Foundation.  Oracle designates this
  10  * particular file as subject to the "Classpath" exception as provided
  11  * by Oracle in the LICENSE file that accompanied this code.
  12  *
  13  * This code is distributed in the hope that it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16  * version 2 for more details (a copy is included in the LICENSE file that
  17  * accompanied this code).
  18  *
  19  * You should have received a copy of the GNU General Public License version
  20  * 2 along with this work; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  22  *
  23  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  24  * or visit www.oracle.com if you need additional information or have any
  25  * questions.
  26  */
  27 package com.sun.javatest.util;
  28 
  29 import java.io.File;
  30 import java.util.Map;
  31 import java.util.Collections;
  32 import java.util.LinkedHashMap;
  33 
  34 public class FileInfoCache
  35 {
  36 
  37     private final int SIZE = 500;
  38 
  39     // we can't use generics in util package but this is actually Map<String, Boolean>
  40     private Map<String, Boolean> map = Collections.synchronizedMap( new LinkedHashMap<String, Boolean>() {
  41         protected boolean removeEldestEntry(Map.Entry eldest) {
  42             return size() > SIZE;
  43         }
  44     });
  45 
  46     public void put(File f, boolean b) {
  47         map.put(f.getAbsolutePath(), b ? Boolean.TRUE : Boolean.FALSE);
  48     }
  49 
  50     public Boolean get(File f) {
  51         return map.get(f.getAbsolutePath());
  52     }
  53 
  54     public void clear() {
  55         map.clear();
  56     }
  57 }