/* * Copyright (c) 1996, 2010, 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 java.beans; import com.sun.beans.finder.PropertyEditorFinder;import sun.awt.AppContext; /** * The PropertyEditorManager can be used to locate a property editor for * any given type name.  This property editor must support the * java.beans.PropertyEditor interface for editing a given object. * <P> * The PropertyEditorManager uses three techniques for locating an editor * for a given type.  First, it provides a registerEditor method to allow * an editor to be specifically registered for a given type.  Second it * tries to locate a suitable class by adding "Editor" to the full * qualified classname of the given type (e.g. "foo.bah.FozEditor"). * Finally it takes the simple classname (without the package name) adds * "Editor" to it and looks in a search-path of packages for a matching * class. * <P> * So for an input class foo.bah.Fred, the PropertyEditorManager would * first look in its tables to see if an editor had been registered for * foo.bah.Fred and if so use that.  Then it will look for a * foo.bah.FredEditor class.  Then it will look for (say) * standardEditorsPackage.FredEditor class. * <p> * Default PropertyEditors will be provided for the Java primitive types * "boolean", "byte", "short", "int", "long", "float", and "double"; and * for the classes java.lang.String. java.awt.Color, and java.awt.Font. */ public class PropertyEditorManager {     private static final Object FINDER_KEY = new Object();     /**     * Registers an editor class to edit values of the given target class.     * If the editor class is {@code null},     * then any existing definition will be removed.     * Thus this method can be used to cancel the registration.     * The registration is canceled automatically     * if either the target or editor class is unloaded.     * <p>     * If there is a security manager, its {@code checkPropertiesAccess}     * method is called. This could result in a {@linkplain SecurityException}.     *     * @param targetType   the class object of the type to be edited     * @param editorClass  the class object of the editor class     * @throws SecurityException  if a security manager exists and     *                            its {@code checkPropertiesAccess} method     *                            doesn't allow setting of system properties     *     * @see SecurityManager#checkPropertiesAccess     */    public static void registerEditor(Class<?> targetType, Class<?> editorClass) {        SecurityManager sm = System.getSecurityManager();        if (sm != null) {            sm.checkPropertiesAccess();        }        getFinder().register(targetType, editorClass);    }     /**     * Locate a value editor for a given target type.     *     * @param targetType  The Class object for the type to be edited     * @return An editor object for the given target class.     * The result is null if no suitable editor can be found.     */    public static PropertyEditor findEditor(Class<?> targetType) {        return getFinder().find(targetType);    }     /**     * Gets the package names that will be searched for property editors.     *     * @return  The array of package names that will be searched in     *          order to find property editors.     * <p>     The default value for this array is implementation-dependent,     *         e.g. Sun implementation initially sets to  {"sun.beans.editors"}.     */    public static String[] getEditorSearchPath() {        return getFinder().getPackages();    }     /**     * Change the list of package names that will be used for     *          finding property editors.     *     * <p>First, if there is a security manager, its <code>checkPropertiesAccess</code>     * method is called. This could result in a SecurityException.     *     * @param path  Array of package names.     * @exception  SecurityException  if a security manager exists and its     *             <code>checkPropertiesAccess</code> method doesn't allow setting     *              of system properties.     * @see SecurityManager#checkPropertiesAccess     */    public static void setEditorSearchPath(String[] path) {        SecurityManager sm = System.getSecurityManager();        if (sm != null) {            sm.checkPropertiesAccess();        }        getFinder().setPackages(path);    }     private static PropertyEditorFinder getFinder() {        AppContext context = AppContext.getAppContext();        Object object = context.get(FINDER_KEY);        if (object instanceof PropertyEditorFinder) {            return (PropertyEditorFinder) object;        }        PropertyEditorFinder finder = new PropertyEditorFinder();        context.put(FINDER_KEY, finder);        return finder;    }}