1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
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8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
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24  */
25 
26 package com.apple.laf;
27 
28 import java.beans.*;
29 import java.util.*;
30 
31 import javax.swing.JComponent;
32 
33 public class ClientPropertyApplicator<T extends JComponent, N> implements PropertyChangeListener {
34     private final Map<String, Property<N>> properties = new HashMap<String, Property<N>>();
35 
ClientPropertyApplicator(final Property<N>... propertyList)36     public ClientPropertyApplicator(final Property<N>... propertyList) {
37         for (final Property<N> p : propertyList) {
38             properties.put(p.name, p);
39         }
40     }
41 
applyProperty(final N target, final String propName, final Object value)42     void applyProperty(final N target, final String propName, final Object value) {
43         final Property<N> property = properties.get(propName);
44         if (property != null) {
45             property.applyProperty(target, value);
46         }
47     }
48 
attachAndApplyClientProperties(final T target)49     public void attachAndApplyClientProperties(final T target) {
50         target.addPropertyChangeListener(this);
51         final N obj = convertJComponentToTarget(target);
52         if (obj == null) {
53             return;
54         }
55 
56         final Set<String> propNames = properties.keySet();
57         for (final String propName : propNames) {
58             final Object value = target.getClientProperty(propName);
59             if (value == null) {
60                 continue;
61             }
62             applyProperty(obj, propName, value);
63         }
64     }
65 
removeFrom(final T target)66     public void removeFrom(final T target) {
67         target.removePropertyChangeListener(this);
68     }
69 
70     @Override
71     @SuppressWarnings("unchecked")
propertyChange(final PropertyChangeEvent evt)72     public void propertyChange(final PropertyChangeEvent evt) {
73         final N obj = convertJComponentToTarget((T)evt.getSource());
74         if (obj == null) return;
75         applyProperty(obj, evt.getPropertyName(), evt.getNewValue());
76     }
77 
78     @SuppressWarnings("unchecked")
convertJComponentToTarget(final T component)79     public N convertJComponentToTarget(final T component) {
80         return (N)component; // naive implementation
81     }
82 
83     public abstract static class Property<X> {
84         final String name;
85 
Property(final String name)86         public Property(final String name) {
87             this.name = name;
88         }
89 
applyProperty(final X target, final Object value)90         public abstract void applyProperty(final X target, final Object value);
91     }
92 }
93