blob: 036dc19eaeb6501299e8f024efff60b5e22a4c64 (
plain) (
blame)
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
|
/*******************************************************************************
* Copyright (c) 2002, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Rational Software - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.core.model;
import org.eclipse.cdt.core.model.CModelException;
import org.eclipse.cdt.core.model.IOpenable;
import org.eclipse.cdt.internal.core.util.LRUCache;
import org.eclipse.cdt.internal.core.util.OverflowingLRUCache;
/**
* An LRU cache of <code>CElements</code>.
*
* This class is similar to the JDT ElementCache class.
*/
public class ElementCache extends OverflowingLRUCache {
/**
* Constructs a new element cache of the given size.
*/
public ElementCache(int size) {
super(size);
}
/**
* Constructs a new element cache of the given size.
*/
public ElementCache(int size, int overflow) {
super(size, overflow);
}
/**
* Returns true if the element is successfully closed and
* removed from the cache, otherwise false.
*
* <p>NOTE: this triggers an external removal of this element
* by closing the element.
*/
protected boolean close(LRUCacheEntry entry) {
IOpenable element = (IOpenable) entry._fKey;
try {
if (element.hasUnsavedChanges()) {
return false;
}
element.close();
return true;
} catch (CModelException npe) {
return false;
}
}
/**
* Returns a new instance of the reciever.
*/
protected LRUCache newInstance(int size, int overflow) {
return new ElementCache(size, overflow);
}
}
|