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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7  * published by the Free Software Foundation.  Oracle designates this
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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19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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24  */
25 
26 package java.beans;
27 
28 import com.sun.beans.finder.BeanInfoFinder;
29 import com.sun.beans.finder.PropertyEditorFinder;
30 
31 import java.awt.GraphicsEnvironment;
32 import java.util.Map;
33 import java.util.WeakHashMap;
34 
35 /**
36  * The {@code ThreadGroupContext} is an application-dependent
37  * context referenced by the specific {@link ThreadGroup}.
38  * This is a replacement for the {@link sun.awt.AppContext}.
39  *
40  * @author  Sergey Malenkov
41  */
42 final class ThreadGroupContext {
43 
44     private static final WeakIdentityMap<ThreadGroupContext> contexts = new WeakIdentityMap<ThreadGroupContext>() {
45         protected ThreadGroupContext create(Object key) {
46             return new ThreadGroupContext();
47         }
48     };
49 
50     /**
51      * Returns the appropriate {@code ThreadGroupContext} for the caller,
52      * as determined by its {@code ThreadGroup}.
53      *
54      * @return  the application-dependent context
55      */
getContext()56     static ThreadGroupContext getContext() {
57         return contexts.get(Thread.currentThread().getThreadGroup());
58     }
59 
60     private volatile boolean isDesignTime;
61     private volatile Boolean isGuiAvailable;
62 
63     private Map<Class<?>, BeanInfo> beanInfoCache;
64     private BeanInfoFinder beanInfoFinder;
65     private PropertyEditorFinder propertyEditorFinder;
66 
ThreadGroupContext()67     private ThreadGroupContext() {
68     }
69 
isDesignTime()70     boolean isDesignTime() {
71         return this.isDesignTime;
72     }
73 
setDesignTime(boolean isDesignTime)74     void setDesignTime(boolean isDesignTime) {
75         this.isDesignTime = isDesignTime;
76     }
77 
78 
isGuiAvailable()79     boolean isGuiAvailable() {
80         Boolean isGuiAvailable = this.isGuiAvailable;
81         return (isGuiAvailable != null)
82                 ? isGuiAvailable.booleanValue()
83                 : !GraphicsEnvironment.isHeadless();
84     }
85 
setGuiAvailable(boolean isGuiAvailable)86     void setGuiAvailable(boolean isGuiAvailable) {
87         this.isGuiAvailable = Boolean.valueOf(isGuiAvailable);
88     }
89 
90 
getBeanInfo(Class<?> type)91     synchronized BeanInfo getBeanInfo(Class<?> type) {
92         return (this.beanInfoCache != null)
93                 ? this.beanInfoCache.get(type)
94                 : null;
95     }
96 
putBeanInfo(Class<?> type, BeanInfo info)97     synchronized BeanInfo putBeanInfo(Class<?> type, BeanInfo info) {
98         if (this.beanInfoCache == null) {
99             this.beanInfoCache = new WeakHashMap<>();
100         }
101         return this.beanInfoCache.put(type, info);
102     }
103 
removeBeanInfo(Class<?> type)104     synchronized void removeBeanInfo(Class<?> type) {
105         if (this.beanInfoCache != null) {
106             this.beanInfoCache.remove(type);
107         }
108     }
109 
clearBeanInfoCache()110     synchronized void clearBeanInfoCache() {
111         if (this.beanInfoCache != null) {
112             this.beanInfoCache.clear();
113         }
114     }
115 
116 
getBeanInfoFinder()117     synchronized BeanInfoFinder getBeanInfoFinder() {
118         if (this.beanInfoFinder == null) {
119             this.beanInfoFinder = new BeanInfoFinder();
120         }
121         return this.beanInfoFinder;
122     }
123 
getPropertyEditorFinder()124     synchronized PropertyEditorFinder getPropertyEditorFinder() {
125         if (this.propertyEditorFinder == null) {
126             this.propertyEditorFinder = new PropertyEditorFinder();
127         }
128         return this.propertyEditorFinder;
129     }
130 }
131