131 * an installed AWTSecurityManager may return the applet's AppContext
132 * based on the execution context.
133 *
134 * @author Thomas Ball
135 * @author Fred Ecks
136 */
137 public final class AppContext {
138 private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.AppContext");
139
140 /* Since the contents of an AppContext are unique to each Java
141 * session, this class should never be serialized. */
142
143 /*
144 * The key to put()/get() the Java EventQueue into/from the AppContext.
145 */
146 public static final Object EVENT_QUEUE_KEY = new StringBuffer("EventQueue");
147
148 /*
149 * The keys to store EventQueue push/pop lock and condition.
150 */
151 public final static Object EVENT_QUEUE_LOCK_KEY = new StringBuilder("EventQueue.Lock");
152 public final static Object EVENT_QUEUE_COND_KEY = new StringBuilder("EventQueue.Condition");
153
154 /* A map of AppContexts, referenced by ThreadGroup.
155 */
156 private static final Map<ThreadGroup, AppContext> threadGroup2appContext =
157 Collections.synchronizedMap(new IdentityHashMap<ThreadGroup, AppContext>());
158
159 /**
160 * Returns a set containing all <code>AppContext</code>s.
161 */
162 public static Set<AppContext> getAppContexts() {
163 synchronized (threadGroup2appContext) {
164 return new HashSet<AppContext>(threadGroup2appContext.values());
165 }
166 }
167
168 /* The main "system" AppContext, used by everything not otherwise
169 contained in another AppContext. It is implicitly created for
170 standalone apps only (i.e. not applets)
171 */
172 private static volatile AppContext mainAppContext = null;
173
174 private static class GetAppContextLock {};
175 private final static Object getAppContextLock = new GetAppContextLock();
176
177 /*
178 * The hash map associated with this AppContext. A private delegate
179 * is used instead of subclassing HashMap so as to avoid all of
180 * HashMap's potentially risky methods, such as clear(), elements(),
181 * putAll(), etc.
182 */
183 private final Map<Object, Object> table = new HashMap<>();
184
185 private final ThreadGroup threadGroup;
186
187 /**
188 * If any <code>PropertyChangeListeners</code> have been registered,
189 * the <code>changeSupport</code> field describes them.
190 *
191 * @see #addPropertyChangeListener
192 * @see #removePropertyChangeListener
193 * @see PropertyChangeSupport#firePropertyChange
194 */
195 private PropertyChangeSupport changeSupport = null;
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131 * an installed AWTSecurityManager may return the applet's AppContext
132 * based on the execution context.
133 *
134 * @author Thomas Ball
135 * @author Fred Ecks
136 */
137 public final class AppContext {
138 private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.AppContext");
139
140 /* Since the contents of an AppContext are unique to each Java
141 * session, this class should never be serialized. */
142
143 /*
144 * The key to put()/get() the Java EventQueue into/from the AppContext.
145 */
146 public static final Object EVENT_QUEUE_KEY = new StringBuffer("EventQueue");
147
148 /*
149 * The keys to store EventQueue push/pop lock and condition.
150 */
151 public static final Object EVENT_QUEUE_LOCK_KEY = new StringBuilder("EventQueue.Lock");
152 public static final Object EVENT_QUEUE_COND_KEY = new StringBuilder("EventQueue.Condition");
153
154 /* A map of AppContexts, referenced by ThreadGroup.
155 */
156 private static final Map<ThreadGroup, AppContext> threadGroup2appContext =
157 Collections.synchronizedMap(new IdentityHashMap<ThreadGroup, AppContext>());
158
159 /**
160 * Returns a set containing all <code>AppContext</code>s.
161 */
162 public static Set<AppContext> getAppContexts() {
163 synchronized (threadGroup2appContext) {
164 return new HashSet<AppContext>(threadGroup2appContext.values());
165 }
166 }
167
168 /* The main "system" AppContext, used by everything not otherwise
169 contained in another AppContext. It is implicitly created for
170 standalone apps only (i.e. not applets)
171 */
172 private static volatile AppContext mainAppContext = null;
173
174 private static class GetAppContextLock {};
175 private static final Object getAppContextLock = new GetAppContextLock();
176
177 /*
178 * The hash map associated with this AppContext. A private delegate
179 * is used instead of subclassing HashMap so as to avoid all of
180 * HashMap's potentially risky methods, such as clear(), elements(),
181 * putAll(), etc.
182 */
183 private final Map<Object, Object> table = new HashMap<>();
184
185 private final ThreadGroup threadGroup;
186
187 /**
188 * If any <code>PropertyChangeListeners</code> have been registered,
189 * the <code>changeSupport</code> field describes them.
190 *
191 * @see #addPropertyChangeListener
192 * @see #removePropertyChangeListener
193 * @see PropertyChangeSupport#firePropertyChange
194 */
195 private PropertyChangeSupport changeSupport = null;
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