| /* |
| * Copyright (c) 2002, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package javax.swing.plaf.basic; |
| |
| import java.lang.reflect.*; |
| import javax.swing.*; |
| import javax.swing.plaf.*; |
| |
| /** |
| * An ActionMap that populates its contents as necessary. The |
| * contents are populated by invoking the <code>loadActionMap</code> |
| * method on the passed in Object. |
| * |
| * @author Scott Violet |
| */ |
| @SuppressWarnings("serial") // Same-version serialization only |
| class LazyActionMap extends ActionMapUIResource { |
| /** |
| * Object to invoke <code>loadActionMap</code> on. This may be |
| * a Class object. |
| */ |
| private transient Object _loader; |
| |
| /** |
| * Installs an ActionMap that will be populated by invoking the |
| * <code>loadActionMap</code> method on the specified Class |
| * when necessary. |
| * <p> |
| * This should be used if the ActionMap can be shared. |
| * |
| * @param c JComponent to install the ActionMap on. |
| * @param loaderClass Class object that gets loadActionMap invoked |
| * on. |
| * @param defaultsKey Key to use to defaults table to check for |
| * existing map and what resulting Map will be registered on. |
| */ |
| static void installLazyActionMap(JComponent c, Class<?> loaderClass, |
| String defaultsKey) { |
| ActionMap map = (ActionMap)UIManager.get(defaultsKey); |
| if (map == null) { |
| map = new LazyActionMap(loaderClass); |
| UIManager.getLookAndFeelDefaults().put(defaultsKey, map); |
| } |
| SwingUtilities.replaceUIActionMap(c, map); |
| } |
| |
| /** |
| * Returns an ActionMap that will be populated by invoking the |
| * <code>loadActionMap</code> method on the specified Class |
| * when necessary. |
| * <p> |
| * This should be used if the ActionMap can be shared. |
| * |
| * @param loaderClass Class object that gets loadActionMap invoked |
| * on. |
| * @param defaultsKey Key to use to defaults table to check for |
| * existing map and what resulting Map will be registered on. |
| */ |
| static ActionMap getActionMap(Class<?> loaderClass, |
| String defaultsKey) { |
| ActionMap map = (ActionMap)UIManager.get(defaultsKey); |
| if (map == null) { |
| map = new LazyActionMap(loaderClass); |
| UIManager.getLookAndFeelDefaults().put(defaultsKey, map); |
| } |
| return map; |
| } |
| |
| |
| private LazyActionMap(Class<?> loader) { |
| _loader = loader; |
| } |
| |
| public void put(Action action) { |
| put(action.getValue(Action.NAME), action); |
| } |
| |
| public void put(Object key, Action action) { |
| loadIfNecessary(); |
| super.put(key, action); |
| } |
| |
| public Action get(Object key) { |
| loadIfNecessary(); |
| return super.get(key); |
| } |
| |
| public void remove(Object key) { |
| loadIfNecessary(); |
| super.remove(key); |
| } |
| |
| public void clear() { |
| loadIfNecessary(); |
| super.clear(); |
| } |
| |
| public Object[] keys() { |
| loadIfNecessary(); |
| return super.keys(); |
| } |
| |
| public int size() { |
| loadIfNecessary(); |
| return super.size(); |
| } |
| |
| public Object[] allKeys() { |
| loadIfNecessary(); |
| return super.allKeys(); |
| } |
| |
| public void setParent(ActionMap map) { |
| loadIfNecessary(); |
| super.setParent(map); |
| } |
| |
| private void loadIfNecessary() { |
| if (_loader != null) { |
| Object loader = _loader; |
| |
| _loader = null; |
| Class<?> klass = (Class<?>)loader; |
| try { |
| Method method = klass.getDeclaredMethod("loadActionMap", |
| new Class<?>[] { LazyActionMap.class }); |
| method.invoke(klass, new Object[] { this }); |
| } catch (NoSuchMethodException nsme) { |
| assert false : "LazyActionMap unable to load actions " + |
| klass; |
| } catch (IllegalAccessException iae) { |
| assert false : "LazyActionMap unable to load actions " + |
| iae; |
| } catch (InvocationTargetException ite) { |
| assert false : "LazyActionMap unable to load actions " + |
| ite; |
| } catch (IllegalArgumentException iae) { |
| assert false : "LazyActionMap unable to load actions " + |
| iae; |
| } |
| } |
| } |
| } |