Method: getInstance()

1: /*
2: * *********************************************************************************************************************
3: *
4: * TheseFoolishThings: Miscellaneous utilities
5: * http://tidalwave.it/projects/thesefoolishthings
6: *
7: * Copyright (C) 2009 - 2023 by Tidalwave s.a.s. (http://tidalwave.it)
8: *
9: * *********************************************************************************************************************
10: *
11: * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
12: * the License. You may obtain a copy of the License at
13: *
14: * http://www.apache.org/licenses/LICENSE-2.0
15: *
16: * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
17: * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
18: * specific language governing permissions and limitations under the License.
19: *
20: * *********************************************************************************************************************
21: *
22: * git clone https://bitbucket.org/tidalwave/thesefoolishthings-src
23: * git clone https://github.com/tidalwave-it/thesefoolishthings-src
24: *
25: * *********************************************************************************************************************
26: */
27: package it.tidalwave.role.ui.impl;
28:
29: import javax.annotation.Nonnull;
30: import java.text.Collator;
31: import java.util.Comparator;
32: import it.tidalwave.util.As;
33: import it.tidalwave.role.ui.Displayable;
34: import static it.tidalwave.role.ui.Displayable._Displayable_;
35:
36: /***********************************************************************************************************************
37: *
38: * A {@link Comparator} for classes implementing the {@link As} interface containing a {@link Displayable} role.
39: *
40: * @author Fabrizio Giudici
41: * @it.tidalwave.javadoc.draft Will be moved to a different package
42: *
43: **********************************************************************************************************************/
44: public final class AsDisplayableComparator implements Comparator<As>
45: {
46: private static final AsDisplayableComparator INSTANCE = new AsDisplayableComparator();
47:
48: private final Collator collator = Collator.getInstance();
49:
50: @Nonnull
51: public static AsDisplayableComparator getInstance()
52: {
53: return INSTANCE;
54: }
55:
56: @Override
57: public int compare (@Nonnull final As object1, @Nonnull final As object2)
58: {
59: return collator.compare(object1.as(_Displayable_).getDisplayName(), object2.as(_Displayable_).getDisplayName());
60: }
61: }