01 /*
02 * Copyright 2008-2015 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 org.codehaus.griffon.runtime.core;
17
18 import griffon.core.Observable;
19
20 import javax.annotation.Nonnull;
21 import javax.annotation.Nullable;
22 import java.beans.PropertyChangeEvent;
23 import java.beans.PropertyChangeListener;
24 import java.beans.PropertyChangeSupport;
25
26 import static griffon.util.GriffonNameUtils.requireNonBlank;
27 import static java.util.Objects.requireNonNull;
28
29 /**
30 * @author Andres Almiray
31 * @since 2.0.0
32 */
33 public abstract class AbstractObservable implements Observable {
34 protected final PropertyChangeSupport pcs;
35
36 public AbstractObservable() {
37 pcs = new PropertyChangeSupport(this);
38 }
39
40 public void addPropertyChangeListener(@Nullable PropertyChangeListener listener) {
41 pcs.addPropertyChangeListener(listener);
42 }
43
44 public void addPropertyChangeListener(@Nullable String propertyName, @Nullable PropertyChangeListener listener) {
45 pcs.addPropertyChangeListener(propertyName, listener);
46 }
47
48 public void removePropertyChangeListener(@Nullable PropertyChangeListener listener) {
49 pcs.removePropertyChangeListener(listener);
50 }
51
52 public void removePropertyChangeListener(@Nullable String propertyName, @Nullable PropertyChangeListener listener) {
53 pcs.removePropertyChangeListener(propertyName, listener);
54 }
55
56 @Nonnull
57 public PropertyChangeListener[] getPropertyChangeListeners() {
58 return pcs.getPropertyChangeListeners();
59 }
60
61 @Nonnull
62 public PropertyChangeListener[] getPropertyChangeListeners(@Nullable String propertyName) {
63 return pcs.getPropertyChangeListeners(propertyName);
64 }
65
66 protected void firePropertyChange(@Nonnull PropertyChangeEvent event) {
67 pcs.firePropertyChange(requireNonNull(event, "Argument 'event' must not be null"));
68 }
69
70 protected void firePropertyChange(@Nonnull String propertyName, @Nullable Object oldValue, @Nullable Object newValue) {
71 pcs.firePropertyChange(requireNonBlank(propertyName, "Argument 'propertyName' must not be blank"), oldValue, newValue);
72 }
73 }
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