01 /*
02 * SPDX-License-Identifier: Apache-2.0
03 *
04 * Copyright 2008-2017 the original author or authors.
05 *
06 * Licensed under the Apache License, Version 2.0 (the "License");
07 * you may not use this file except in compliance with the License.
08 * You may obtain a copy of the License at
09 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.codehaus.griffon.runtime.core;
19
20 import griffon.core.Observable;
21
22 import javax.annotation.Nonnull;
23 import javax.annotation.Nullable;
24 import java.beans.PropertyChangeEvent;
25 import java.beans.PropertyChangeListener;
26 import java.beans.PropertyChangeSupport;
27
28 import static griffon.util.GriffonNameUtils.requireNonBlank;
29 import static java.util.Objects.requireNonNull;
30
31 /**
32 * @author Andres Almiray
33 * @since 2.0.0
34 */
35 public abstract class AbstractObservable implements Observable {
36 protected final PropertyChangeSupport pcs;
37
38 public AbstractObservable() {
39 pcs = new PropertyChangeSupport(this);
40 }
41
42 public void addPropertyChangeListener(@Nullable PropertyChangeListener listener) {
43 pcs.addPropertyChangeListener(listener);
44 }
45
46 public void addPropertyChangeListener(@Nullable String propertyName, @Nullable PropertyChangeListener listener) {
47 pcs.addPropertyChangeListener(propertyName, listener);
48 }
49
50 public void removePropertyChangeListener(@Nullable PropertyChangeListener listener) {
51 pcs.removePropertyChangeListener(listener);
52 }
53
54 public void removePropertyChangeListener(@Nullable String propertyName, @Nullable PropertyChangeListener listener) {
55 pcs.removePropertyChangeListener(propertyName, listener);
56 }
57
58 @Nonnull
59 public PropertyChangeListener[] getPropertyChangeListeners() {
60 return pcs.getPropertyChangeListeners();
61 }
62
63 @Nonnull
64 public PropertyChangeListener[] getPropertyChangeListeners(@Nullable String propertyName) {
65 return pcs.getPropertyChangeListeners(propertyName);
66 }
67
68 protected void firePropertyChange(@Nonnull PropertyChangeEvent event) {
69 pcs.firePropertyChange(requireNonNull(event, "Argument 'event' must not be null"));
70 }
71
72 protected void firePropertyChange(@Nonnull String propertyName, @Nullable Object oldValue, @Nullable Object newValue) {
73 pcs.firePropertyChange(requireNonBlank(propertyName, "Argument 'propertyName' must not be blank"), oldValue, newValue);
74 }
75 }
|