1 /* 2 * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved. 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 6 * under the terms of the GNU General Public License version 2 only, as 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 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 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