org.panbox.desktop.common.vfs.backend.VirtualMultiuserRootFile.java Source code

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Here is the source code for org.panbox.desktop.common.vfs.backend.VirtualMultiuserRootFile.java

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/*
 * 
 *               Panbox - encryption for cloud storage 
 *      Copyright (C) 2014-2015 by Fraunhofer SIT and Sirrix AG 
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program 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 for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * Additonally, third party code may be provided with notices and open source
 * licenses from communities and third parties that govern the use of those
 * portions, and any licenses granted hereunder do not alter any rights and
 * obligations you may have under such open source licenses, however, the
 * disclaimer of warranty and limitation of liability provisions of the GPLv3 
 * will apply to all the product.
 * 
 */
package org.panbox.desktop.common.vfs.backend;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;

import org.apache.commons.io.FilenameUtils;
import org.apache.log4j.Logger;
import org.panbox.core.crypto.AbstractObfuscatorFactory;
import org.panbox.core.crypto.FileObfuscatorFactory;
import org.panbox.core.exception.ObfuscationException;
import org.panbox.core.vfs.backend.VirtualFile;

public class VirtualMultiuserRootFile extends VirtualFile {

    private static final Logger logger = Logger.getLogger(VirtualMultiuserRootFile.class);
    private final String sid;
    private final Queue<VFSShare> userShares;

    VirtualMultiuserRootFile(String sid) {
        super(File.separator + sid, null);
        this.sid = sid;
        this.userShares = new ConcurrentLinkedQueue<>();
    }

    /**
     * Gets the relative Path for the VirtualRoot-File
     * 
     * @return returns java.io.File.seperator
     */
    @Override
    public String getRelativePath() {
        return File.separator + sid;
    }

    /**
     * Gets the Path for the VirtualRoot-File
     * 
     * @return returns java.io.File.seperator
     */
    @Override
    public String getPath() {
        return File.separator + sid;
    }

    /**
     * Lists all directories in the VirtualRootVolume, which are all attached
     * shares.
     * 
     * @return Array of VirtualFile contains a VirtualFile wrapper file, that
     *         leads directory to the root-file of the attached shares.
     */
    @Override
    public VirtualFile[] list() {
        List<VirtualFile> files = new ArrayList<VirtualFile>();
        for (final VFSShare share : userShares) {
            VirtualFile shareFile = null;
            shareFile = new VirtualFile(share.getShareName(), share.getBackend()) {

                @Override
                public VirtualFile[] list() throws IOException {
                    return share.getBackend().getFile(File.separator).list(); // forward
                    // to
                    // VirtualVolume
                    // of
                    // share
                }

                @Override
                public String getRelativePath() {
                    return share.getShareName();
                }

                @Override
                public String getPath() {
                    return share.getShareName();
                }
            };
            files.add(shareFile);
        }
        return files.toArray(new VirtualFile[files.size()]);
    }

    public synchronized void addShare(VFSShare share) {
        userShares.add(share);
    }

    public synchronized boolean removeShare(String shareName) {
        Iterator<VFSShare> it = userShares.iterator();
        while (it.hasNext()) {
            VFSShare cur = it.next();
            if (cur.getShareName().equals(shareName)) {
                // try to remove obfuscator instance for the share
                try {
                    AbstractObfuscatorFactory.getFactory(FileObfuscatorFactory.class)
                            .removeInstance(cur.getObfuscator());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException
                        | ObfuscationException e) {
                    logger.error("Unable to remove obfuscator instance for share " + cur.getShareName(), e);
                }
                it.remove();
                return true;
            }
        }
        return false;
    }

    public synchronized boolean hasShares() {
        return !userShares.isEmpty();
    }

    public synchronized boolean existsAndChanged(VFSShare vfsShare) {
        for (VFSShare share : userShares) {
            if (share.getShareName().equals(vfsShare.getShareName())) {
                if (FilenameUtils.equalsNormalizedOnSystem(share.getBackend().getRoot().getPath(),
                        vfsShare.getBackend().getRoot().getPath())) {
                    return true; // exists and changed!
                } else {
                    return false; // exists but didn't change
                }
            }
        }
        return false; // does not exist
    }

    public Queue<VFSShare> getShares() {
        return userShares;
    }

    public String getSid() {
        return sid;
    }
}