Java FileObject.canRevert方法代碼示例

import org.openide.filesystems.FileObject; //導入方法依賴的package包/類
/**
 * Custom profile is present if:
 * a/ the profile's folder can be reverted (=> was materialized on writable layer)
 * b/ there's no "reveal" entry for it in its parent => was not present
 * @param profileName
 * @return C
 */
public boolean isCustomProfile(String profileName) {
    DataFolder profileFolder = getExistingProfile(profileName);
    if (profileFolder == null) {
        return true;
    }
    FileObject f = profileFolder.getPrimaryFile();
    if (!f.canRevert()) {
        return false;
    }
    FileObject parentF = profileFolder.getPrimaryFile().getParent();
    if (parentF == null) {
        // very very unlikely
        return true;
    }
    Collection<FileObject> col = (Collection<FileObject>)parentF.getAttribute("revealEntries");
    if (col == null) {
        return true;
    }
    for (FileObject f2 : col) {
        if (f2.getNameExt().equals(profileName)) {
            return false;
        }
    }
    return true;
}
 

import org.openide.filesystems.FileObject; //導入方法依賴的package包/類
private static void delete(FileObject file) throws IOException { // cf. #162526
    if (file.canRevert()) {
        file.revert();
    } else {
        throw new IOException("Could not delete " + file);
    }
}
 

import org.openide.filesystems.FileObject; //導入方法依賴的package包/類
/**
 * Returns instance of GlobalAction encapsulating action, or null.
 */
private GlobalAction createAction (DataObject dataObject, String prefix, String name, boolean ignoreUserRemoves) {
    InstanceCookie ic = dataObject.getCookie(InstanceCookie.class);
    // handle any non-IC file as instruction to remove the action
    FileObject pf = dataObject.getPrimaryFile();
    if (ignoreUserRemoves && pf.canRevert()) {
        return null;
    }
    if (ic == null) {
        if (!EXT_REMOVED.equals(pf.getExt())) {
            LOG.log(Level.WARNING, "Invalid shortcut: {0}", dataObject);
            return null;
        }
        // ignore the 'remove' file, if there's a shadow (= real action) present
        if (FileUtil.findBrother(pf, "shadow") != null) {
            // handle redefinition + removal: ignore the removal.
            return null;
        }
        return REMOVED;
    }
    try {
        Object action = ic.instanceCreate ();
        if (action == null) return null;
        if (!(action instanceof Action)) return null;
        return createAction((Action) action, prefix, name);
    } catch (Exception ex) {
        ex.printStackTrace ();
        return null;
    }
}
 

import org.openide.filesystems.FileObject; //導入方法依賴的package包/類
private static boolean canRevert(Node[] nodes) {
    if (nodes == null) {
        return false;
    }
    boolean can = false;
    for (Node node : nodes) {
        FileObject fo = node.getLookup().lookup(FileObject.class);
        if (fo != null && fo.canRevert()) {
            can = true;
        } else {
            return false;
        }
    }
    return can;
}
 

import org.openide.filesystems.FileObject; //導入方法依賴的package包/類
/** Test if the file physically exists on disk and thus was created by user and can be renamed. */
private static boolean isUserFile(FileObject fo) {
    // A layer-defined folder with a user-added file (or subfolder) should not be renamable:
    for (FileObject child : fo.getChildren()) {
        if (!isUserFile(child)) {
            return false;
        }
    }
    return fo.canRevert();
}