JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2000, 2014, 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 sun.awt.shell;

import java.io.File;
import java.security.AccessController;
import javax.swing.Icon;
import sun.security.action.GetPropertyAction;

/**
 * @author Michael Martak
 * @since 1.4
 */
@SuppressWarnings("serial") // JDK-implementation class
class DefaultShellFolder extends ShellFolder {

    /**
     * Create a file system shell folder from a file
     */
    DefaultShellFolder(ShellFolder parent, File f) {
        super(parent, f.getAbsolutePath());
    }

    /**
     * This method is implemented to make sure that no instances
     * of {@code ShellFolder} are ever serialized. An instance of
     * this default implementation can always be represented with a
     * {@code java.io.File} object instead.
     *
     * @return a java.io.File replacement object.
     */
    protected Object writeReplace() throws java.io.ObjectStreamException {
        return new File(getPath());
    }

    /**
     * @return An array of shell folders that are children of this shell folder
     * object, null if this shell folder is empty.
     */
    public File[] listFiles() {
        File[] files = super.listFiles();
        if (files != null) {
            for (int i = 0; i < files.length; i++) {
                files[i] = new DefaultShellFolder(this, files[i]);
            }
        }
        return files;
    }

    /**
     * @return Whether this shell folder is a link
     */
    public boolean isLink() {
        return false; // Not supported by default
    }

    /**
     * @return Whether this shell folder is marked as hidden
     */
    public boolean isHidden() {
        String fileName = getName();
        if (fileName.length() > 0) {
            return (fileName.charAt(0) == '.');
        }
        return false;
    }

    /**
     * @return The shell folder linked to by this shell folder, or null
     * if this shell folder is not a link
     */
    public ShellFolder getLinkLocation() {
        return null; // Not supported by default
    }

    /**
     * @return The name used to display this shell folder
     */
    public String getDisplayName() {
        return getName();
    }

    /**
     * @return The type of shell folder as a string
     */

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