1 /*
2 * *************************************************************************************************************************************************************
3 *
4 * SteelBlue: DCI User Interfaces
5 * http://tidalwave.it/projects/steelblue
6 *
7 * Copyright (C) 2015 - 2025 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 the License.
12 * 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 an "AS IS" BASIS, WITHOUT WARRANTIES OR
17 * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
18 *
19 * *************************************************************************************************************************************************************
20 *
21 * git clone https://bitbucket.org/tidalwave/steelblue-src
22 * git clone https://github.com/tidalwave-it/steelblue-src
23 *
24 * *************************************************************************************************************************************************************
25 */
26 package it.tidalwave.ui.function;
27
28 import jakarta.annotation.Nonnull;
29 import it.tidalwave.ui.core.ChangingSource;
30
31 /***************************************************************************************************************************************************************
32 *
33 * @since 2.0-ALPHA-1
34 * @author Fabrizio Giudici
35 *
36 **************************************************************************************************************************************************************/
37 public abstract class UnaryBoundFunctionSupport<DOMAIN_TYPE, CODOMAIN_TYPE>
38 extends BoundFunctionSupport<DOMAIN_TYPE, CODOMAIN_TYPE>
39 {
40 @Nonnull
41 protected final ChangingSource<DOMAIN_TYPE> source;
42
43 protected CODOMAIN_TYPE value;
44
45 protected UnaryBoundFunctionSupport (@Nonnull final ChangingSource<DOMAIN_TYPE> source)
46 {
47 this.source = source;
48 source.addPropertyChangeListener(event ->
49 onSourceChange((DOMAIN_TYPE)event.getOldValue(), (DOMAIN_TYPE)event.getNewValue()));
50 }
51
52 protected void onSourceChange (@Nonnull final DOMAIN_TYPE oldSourceValue, @Nonnull final DOMAIN_TYPE newSourceValue)
53 {
54 final var oldValue = function(oldSourceValue);
55 value = function(newSourceValue);
56 fireValueChanged(oldValue, value);
57 }
58
59 @Nonnull
60 protected abstract CODOMAIN_TYPE function (final DOMAIN_TYPE value);
61
62 @Override @Nonnull
63 public final CODOMAIN_TYPE get()
64 {
65 return value;
66 }
67 }