01 /*
02 * Copyright 2008-2017 the original author or authors.
03 *
04 * Licensed under the Apache License, Version 2.0 (the "License");
05 * you may not use this file except in compliance with the License.
06 * You may obtain a copy of the License at
07 *
08 * http://www.apache.org/licenses/LICENSE-2.0
09 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package griffon.javafx.beans.binding;
17
18 import javafx.beans.value.ChangeListener;
19 import javafx.beans.value.ObservableValue;
20
21 import javax.annotation.Nonnull;
22
23 import static java.util.Objects.requireNonNull;
24
25 /**
26 * @author Andres Almiray
27 * @since 2.11.0
28 */
29 public class ChangeListenerDecorator<T> implements ChangeListener<T> {
30 private final ChangeListener<? super T> delegate;
31
32 public ChangeListenerDecorator(@Nonnull ChangeListener<? super T> delegate) {
33 this.delegate = requireNonNull(delegate, "Argument 'delegate' must not be null");
34 }
35
36 @Nonnull
37 protected final ChangeListener<? super T> getDelegate() {
38 return delegate;
39 }
40
41 @Override
42 public void changed(final ObservableValue<? extends T> observable, final T oldValue, final T newValue) {
43 delegate.changed(observable, oldValue, newValue);
44 }
45
46 @Override
47 public boolean equals(Object o) {
48 return this == o || delegate.equals(o);
49 }
50
51 @Override
52 public int hashCode() {
53 return delegate.hashCode();
54 }
55
56 @Override
57 public String toString() {
58 return getClass().getName() + ":" + delegate.toString();
59 }
60 }
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