Package: NullSelectionProvider$1

NullSelectionProvider$1

name	instruction	branch	complexity	line	method
isEmpty()	M: 0 C: 2 100%	M: 0 C: 0 100%	M: 0 C: 1 100%	M: 0 C: 1 100%	M: 0 C: 1 100%
{...}	M: 0 C: 3 100%	M: 0 C: 0 100%	M: 0 C: 1 100%	M: 0 C: 1 100%	M: 0 C: 1 100%

Coverage

1: /*******************************************************************************
2: * Copyright (c) 2019 Christian W. Damus and others.
3: *
4: * All rights reserved. This program and the accompanying materials
5: * are made available under the terms of the Eclipse Public License 2.0
6: * which accompanies this distribution, and is available at
7: * https://www.eclipse.org/legal/epl-2.0/
8: *
9: * SPDX-License-Identifier: EPL-2.0
10: *
11: * Contributors:
12: * Christian W. Damus - initial API and implementation
13: ******************************************************************************/
14: package org.eclipse.emf.ecp.view.spi.swt.selection;
15:
16: import org.eclipse.jface.viewers.IPostSelectionProvider;
17: import org.eclipse.jface.viewers.ISelection;
18: import org.eclipse.jface.viewers.ISelectionChangedListener;
19:
20: /**
21: * A provider of no selection, ever.
22: *
23: * @since 1.21
24: */
25: public final class NullSelectionProvider implements IPostSelectionProvider {
26:
27:         private static final ISelection EMPTY = new ISelection() {
28:                 @Override
29:                 public boolean isEmpty() {
30:                         return true;
31:                 }
32:         };
33:
34:         /** There needs only be one instance of this class, and this is it. */
35:         public static final NullSelectionProvider INSTANCE = new NullSelectionProvider();
36:
37:         /**
38:          * Initializes me.
39:          */
40:         private NullSelectionProvider() {
41:                 super();
42:         }
43:
44:         @Override
45:         public ISelection getSelection() {
46:                 return EMPTY;
47:         }
48:
49:         @Override
50:         public void setSelection(ISelection selection) {
51:                 // Selection never changes
52:         }
53:
54:         @Override
55:         public void addSelectionChangedListener(ISelectionChangedListener listener) {
56:                 // Selection never changes
57:         }
58:
59:         @Override
60:         public void removeSelectionChangedListener(ISelectionChangedListener listener) {
61:                 // Selection never changes
62:         }
63:
64:         @Override
65:         public void addPostSelectionChangedListener(ISelectionChangedListener listener) {
66:                 // Selection never changes
67:         }
68:
69:         @Override
70:         public void removePostSelectionChangedListener(ISelectionChangedListener listener) {
71:                 // Selection never changes
72:         }
73:
74: }