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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
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 * 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).
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 * 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,
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package sun.awt.shell;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;
import javax.swing.SwingConstants;

Author:Michael Martak
Since:1.4
/** * @author Michael Martak * @since 1.4 */
class ShellFolderManager { private static final String COLUMN_NAME = "FileChooser.fileNameHeaderText"; private static final String COLUMN_SIZE = "FileChooser.fileSizeHeaderText"; private static final String COLUMN_DATE = "FileChooser.fileDateHeaderText";
Create a shell folder from a file. Override to return machine-dependent behavior.
/** * Create a shell folder from a file. * Override to return machine-dependent behavior. */
public ShellFolder createShellFolder(File file) throws FileNotFoundException { return new DefaultShellFolder(null, file); }
Params:
  • key – a String "fileChooserDefaultFolder": Returns a File - the default shellfolder for a new filechooser "roots": Returns a File[] - containing the root(s) of the displayable hieararchy "fileChooserComboBoxFolders": Returns a File[] - an array of shellfolders representing the list to show by default in the file chooser's combobox "fileChooserShortcutPanelFolders": Returns a File[] - an array of shellfolders representing well-known folders, such as Desktop, Documents, History, Network, Home, etc. This is used in the shortcut panel of the filechooser on Windows 2000 and Windows Me. "fileChooserIcon nn": Returns an Image - icon nn from resource 124 in comctl32.dll (Windows only).
Returns:An Object matching the key string.
/** * @param key a <code>String</code> * "fileChooserDefaultFolder": * Returns a <code>File</code> - the default shellfolder for a new filechooser * "roots": * Returns a <code>File[]</code> - containing the root(s) of the displayable hieararchy * "fileChooserComboBoxFolders": * Returns a <code>File[]</code> - an array of shellfolders representing the list to * show by default in the file chooser's combobox * "fileChooserShortcutPanelFolders": * Returns a <code>File[]</code> - an array of shellfolders representing well-known * folders, such as Desktop, Documents, History, Network, Home, etc. * This is used in the shortcut panel of the filechooser on Windows 2000 * and Windows Me. * "fileChooserIcon nn": * Returns an <code>Image</code> - icon nn from resource 124 in comctl32.dll (Windows only). * * @return An Object matching the key string. */
public Object get(String key) { if (key.equals("fileChooserDefaultFolder")) { // Return the default shellfolder for a new filechooser File homeDir = new File(System.getProperty("user.home")); try { return createShellFolder(homeDir); } catch (FileNotFoundException e) { return homeDir; } } else if (key.equals("roots")) { // The root(s) of the displayable hieararchy return File.listRoots(); } else if (key.equals("fileChooserComboBoxFolders")) { // Return an array of ShellFolders representing the list to // show by default in the file chooser's combobox return get("roots"); } else if (key.equals("fileChooserShortcutPanelFolders")) { // Return an array of ShellFolders representing well-known // folders, such as Desktop, Documents, History, Network, Home, etc. // This is used in the shortcut panel of the filechooser on Windows 2000 // and Windows Me return new File[] { (File)get("fileChooserDefaultFolder") }; } return null; }
Does dir represent a "computer" such as a node on the network, or "My Computer" on the desktop.
/** * Does <code>dir</code> represent a "computer" such as a node on the network, or * "My Computer" on the desktop. */
public boolean isComputerNode(File dir) { return false; } public boolean isFileSystemRoot(File dir) { if (dir instanceof ShellFolder && !((ShellFolder)dir).isFileSystem()) { return false; } return (dir.getParentFile() == null); } public void sortFiles(List files) { Collections.sort(files, fileComparator); } private Comparator fileComparator = new Comparator() { public int compare(Object a, Object b) { return compare((File)a, (File)b); } public int compare(File f1, File f2) { ShellFolder sf1 = null; ShellFolder sf2 = null; if (f1 instanceof ShellFolder) { sf1 = (ShellFolder)f1; if (sf1.isFileSystem()) { sf1 = null; } } if (f2 instanceof ShellFolder) { sf2 = (ShellFolder)f2; if (sf2.isFileSystem()) { sf2 = null; } } if (sf1 != null && sf2 != null) { return sf1.compareTo(sf2); } else if (sf1 != null) { return -1; // Non-file shellfolders sort before files } else if (sf2 != null) { return 1; } else { String name1 = f1.getName(); String name2 = f2.getName(); // First ignore case when comparing int diff = name1.toLowerCase().compareTo(name2.toLowerCase()); if (diff != 0) { return diff; } else { // May differ in case (e.g. "mail" vs. "Mail") // We need this test for consistent sorting return name1.compareTo(name2); } } } }; public ShellFolderColumnInfo[] getFolderColumns(File dir) { ShellFolderColumnInfo[] columns = null; if (dir instanceof ShellFolder) { columns = ((ShellFolder)dir).getFolderColumns(); } if (columns == null) { columns = new ShellFolderColumnInfo[]{ new ShellFolderColumnInfo(COLUMN_NAME, 150, SwingConstants.LEADING, true, null, fileComparator), new ShellFolderColumnInfo(COLUMN_SIZE, 75, SwingConstants.RIGHT, true, null, ComparableComparator.getInstance(), true), new ShellFolderColumnInfo(COLUMN_DATE, 130, SwingConstants.LEADING, true, null, ComparableComparator.getInstance(), true) }; } return columns; } public Object getFolderColumnValue(File file, int column) { if (file instanceof ShellFolder) { Object value = ((ShellFolder)file).getFolderColumnValue(column); if (value != null) { return value; } } if (file == null || !file.exists()) { return null; } switch (column) { case 0: // By default, file name will be rendered using getSystemDisplayName() return file; case 1: // size return file.isDirectory() ? null : new Long(file.length()); case 2: // date if (isFileSystemRoot(file)) { return null; } long time = file.lastModified(); return (time == 0L) ? null : new Date(time); default: return null; } }
This class provides a default comparator for the default column set
/** * This class provides a default comparator for the default column set */
private static class ComparableComparator implements Comparator { private static Comparator instance; public static Comparator getInstance() { if (instance == null) { instance = new ComparableComparator(); } return instance; } public int compare(Object o1, Object o2) { int gt; if (o1 == null && o2 == null) { gt = 0; } else if (o1 != null && o2 == null) { gt = 1; } else if (o1 == null && o2 != null) { gt = -1; } else if (o1 instanceof Comparable) { gt = ((Comparable) o1).compareTo(o2); } else { gt = 0; } return gt; } } }