/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License (the "License").

 * You may not use this file except in compliance with the License.

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.

 */

package com.oracle.solaris.vp.panel.common.api.file;

import java.io.*;

import java.lang.reflect.UndeclaredThrowableException;

import java.util.*;

import javax.swing.*;

import javax.swing.filechooser.FileSystemView;

import com.oracle.solaris.adr.Stability;

import com.oracle.solaris.rad.ObjectException;

import com.oracle.solaris.vp.panel.common.*;

import com.oracle.solaris.vp.util.misc.IOUtil;

public class RemoteFileSystemView extends FileSystemView {

    //

    // Instance data

    //

    private MXBeanTracker<FileBrowserMXBean> tracker;

    //

    // Constructors

    //

    public RemoteFileSystemView(ClientContext context)

	throws TrackerException {

	tracker = new MXBeanTracker<FileBrowserMXBean>(

            FileBrowserUtil.OBJECT_NAME, FileBrowserMXBean.class,

            Stability.PRIVATE, context);

    }

    //

    // FileSystemView methods

    //

    @Override

    public RemoteFile createFileObject(File dir, String fileName) {

	if (dir != null) {

	    fileName = dir.getAbsolutePath() + File.separator + fileName;

	}

	return createFileObject(fileName);

    }

    @Override

    public RemoteFile createFileObject(String path) {

	try {

	    FileBrowserMXBean browser = tracker.getBean();

	    FileSnapshot snap = browser.getFile(path);

	    return snap != null ?

		new RemoteFile(browser, browser.getFile(path)) : null;

	} catch (ObjectException ex) {

	    return null;

	}

    }

    @Override

    protected RemoteFile createFileSystemRoot(File file) {

	return toRemoteFile(file);

    }

    @Override

    public RemoteFile createNewFolder(File containingDir) throws IOException {

	throw new IOException("operation not supported");

    }

    @Override

    public RemoteFile getChild(File parent, String fileName) {

	return createFileObject(parent, fileName);

    }

    @Override

    public RemoteFile getDefaultDirectory() {

	RemoteFile home = getHomeDirectory();

	if (home.exists()) {

	    return home;

	}

	return getRoots()[0];

    }

    @Override

    public RemoteFile[] getFiles(File dir, boolean useFileHiding) {

	List<RemoteFile> files = new ArrayList<RemoteFile>();

	FileBrowserMXBean browser = tracker.getBean();

	List<FileSnapshot> snapshots;

	try {

		snapshots = browser.getFiles(dir.getAbsolutePath());

	} catch (ObjectException e) {

		return (new RemoteFile[0]);

	} catch (java.lang.reflect.UndeclaredThrowableException e) {

		/*

		 * Our caller, BasicDirectoryModel, may interrupt us at

		 * any time.  This can cause exceptions to be thrown.

		 * In our case, our transport may throw an exception

		 * which is mapped by the MBean proxy to a

		 * UndeclaredThrowableException.

		 *

		 * Unfortunately, the FileSystemView interface doesn't

		 * allow us to throw exceptions, and letting an

		 * unchecked exception by results in noise to the

		 * user's terminal.  BasicDirectoryModel does check to

		 * see if the thread has been interrupted, though, so

		 * we mark ourselves as such and return an empty list

		 * of files.

		 */

		Thread.currentThread().interrupt();

		return (new RemoteFile[0]);

	}

	for (FileSnapshot ss : snapshots) {

	    if (!useFileHiding || !ss.isHidden()) {

		files.add(new RemoteFile(browser, ss));

	    }

	}

	return files.toArray(new RemoteFile[files.size()]);

    }

    @Override

    public RemoteFile getHomeDirectory() {

	return createFileObject(System.getProperty("user.home"));

    }

    @Override

    public RemoteFile getParentDirectory(File dir) {

	return toRemoteFile(dir).getParentFile();

    }

    public RemoteFile[] getRoots() {

	FileBrowserMXBean browser = tracker.getBean();

	List<FileSnapshot> snapshots = browser.getroots();

	return RemoteFile.toFiles(browser, snapshots);

    }

    @Override

    public String getSystemDisplayName(File file) {

	return file.getName();

    }

    @Override

    public Icon getSystemIcon(File file) {

	return UIManager.getIcon(file.isDirectory() ?

	    "FileView.directoryIcon" : "FileView.fileIcon");

    }

    @Override

    public String getSystemTypeDescription(File file) {

	return null;

    }

    @Override

    public boolean isComputerNode(File dir) {

	return false;

    }

    @Override

    public boolean isDrive(File dir) {

	return isFileSystemRoot(dir);

    }

    @Override

    public boolean isFileSystem(File file) {

	return true;

    }

    @Override

    public boolean isFileSystemRoot(File dir) {

	String fullName = IOUtil.getFullName(dir);

	RemoteFile[] roots = getRoots();

	for (RemoteFile root : roots) {

	    if (fullName.equals(IOUtil.getFullName(root))) {

		return true;

	    }

	}

	return false;

    }

    @Override

    public boolean isFloppyDrive(File dir) {

	return false;

    }

    @Override

    public boolean isHiddenFile(File file) {

	return toRemoteFile(file).isHidden();

    }

    @Override

    public boolean isParent(File dir, File file) {

	boolean retVal = dir.equals(file.getParentFile());

	return retVal;

    }

    @Override

    public boolean isRoot(File file) {

	return isFileSystemRoot(file);

    }

    @Override

    public Boolean isTraversable(File file) {

	return file.isDirectory();

    }

    //

    // RemoteFileSystemView methods

    //

    /**

     * Stops monitoring the connection to the remote host.

     */

    public void dispose() {

	tracker.dispose();

    }

    //

    // Private methods

    //

    private RemoteFile toRemoteFile(File file) {

	if (file instanceof RemoteFile) {

	    RemoteFile rFile = (RemoteFile)file;

	    if (rFile.getBrowser() == tracker.getBean()) {

		return rFile;

	    }

	}

	return createFileObject(file.getAbsolutePath());

    }

}