Method: lambda$new$0(PropertyChangeEvent)

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.core.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: @SuppressWarnings("this-escape")
38: public abstract class UnaryBoundFunctionSupport<T, R> extends BoundFunctionSupport<T, R>
39: {
40: @Nonnull
41: protected final ChangingSource<T> source;
42:
43: protected R value;
44:
45: @SuppressWarnings("unchecked")
46: protected UnaryBoundFunctionSupport (@Nonnull final ChangingSource<T> source)
47: {
48: this.source = source;
49: source.addPropertyChangeListener(event -> onSourceChange((T)event.getOldValue(), (T)event.getNewValue()));
50: }
51:
52: protected void onSourceChange (@Nonnull final T oldSourceValue, @Nonnull final T newSourceValue)
53: {
54: final var oldValue = function(oldSourceValue);
55: value = function(newSourceValue);
56: fireValueChanged(oldValue, value);
57: }
58:
59: @Nonnull
60: protected abstract R function (final T value);
61:
62: @Override @Nonnull
63: public final R get()
64: {
65: return value;
66: }
67: }