blob: f5e05a3952b485e5e8fb216297498207c93ce757 (
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
64
65
66
67
68
69
70
71
72
|
/*******************************************************************************
* Copyright (c) 2006, 2009 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:
* IBM Corporation - initial API and implementation
* Matthew Hall - bugs 251884, 194734
*******************************************************************************/
package org.eclipse.core.databinding.observable.set;
import java.util.Set;
import org.eclipse.core.databinding.observable.IDiff;
/**
* @since 1.0
*
*/
public abstract class SetDiff implements IDiff {
/**
* @return the set of added elements
*/
public abstract Set getAdditions();
/**
* @return the set of removed elements
*/
public abstract Set getRemovals();
/**
* Returns true if the diff has no added or removed elements.
*
* @return true if the diff has no added or removed elements.
* @since 1.2
*/
public boolean isEmpty() {
return getAdditions().isEmpty() && getRemovals().isEmpty();
}
/**
* Applies the changes in this diff to the given set
*
* @param set
* the set to which the diff will be applied
* @since 1.2
*/
public void applyTo(Set set) {
set.addAll(getAdditions());
set.removeAll(getRemovals());
}
/**
* @see java.lang.Object#toString()
*/
public String toString() {
StringBuffer buffer = new StringBuffer();
buffer
.append(getClass().getName())
.append("{additions [") //$NON-NLS-1$
.append(getAdditions() != null ? getAdditions().toString() : "null") //$NON-NLS-1$
.append("], removals [") //$NON-NLS-1$
.append(getRemovals() != null ? getRemovals().toString() : "null") //$NON-NLS-1$
.append("]}"); //$NON-NLS-1$
return buffer.toString();
}
}
|
