1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2006 - 2009 Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.resourceloader.cache;
import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
import org.pentaho.reporting.libraries.resourceloader.ResourceData;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.resourceloader.ResourceLoadingException;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
/**
* Disables caching. It simply returns null on every request and ignores
* the put requests. You certainly want to use one of the other cache
* providers in real world applications.
*
* @author Thomas Morgner
*/
public class NullResourceDataCache implements ResourceDataCache
{
private Reference lastEntry;
public NullResourceDataCache()
{
}
public ResourceData put(final ResourceManager caller, final ResourceData data) throws ResourceLoadingException
{
final ResourceData retval = CachingResourceData.createCached(data);
lastEntry = new WeakReference(new DefaultResourceDataCacheEntry(retval, caller));
return retval;
}
public ResourceDataCacheEntry get(final ResourceKey key)
{
if (lastEntry != null)
{
final ResourceDataCacheEntry entry = (ResourceDataCacheEntry) lastEntry.get();
if (entry != null && key.equals(entry.getData().getKey()))
{
return entry;
}
lastEntry = null;
}
return null;
}
public void remove(final ResourceData data)
{
}
public void clear()
{
lastEntry = null;
}
public void shutdown()
{
lastEntry = null;
}
}
|
