com.sonicle.webtop.vfs.sfs.StoreFileSystem.java Source code

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Here is the source code for com.sonicle.webtop.vfs.sfs.StoreFileSystem.java

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/*
 * webtop-vfs is a WebTop Service developed by Sonicle S.r.l.
 * Copyright (C) 2014 Sonicle S.r.l.
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by
 * the Free Software Foundation with the addition of the following permission
 * added to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED
 * WORK IN WHICH THE COPYRIGHT IS OWNED BY SONICLE, SONICLE DISCLAIMS THE
 * WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * 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 Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA.
 *
 * You can contact Sonicle S.r.l. at email address sonicle@sonicle.com
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License
 * version 3, these Appropriate Legal Notices must retain the display of the
 * "Powered by Sonicle WebTop" logo. If the display of the logo is not reasonably
 * feasible for technical reasons, the Appropriate Legal Notices must display
 * the words "Powered by Sonicle WebTop".
 */
package com.sonicle.webtop.vfs.sfs;

import com.sonicle.commons.PathUtils;
import java.net.URI;
import java.net.URISyntaxException;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystemException;
import org.apache.commons.vfs2.FileSystemManager;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.VFS;

/**
 *
 * @author malbinola
 */
public abstract class StoreFileSystem {
    protected URI uri;
    protected String parameters;
    protected boolean autoCreateRoot = false;
    protected final FileSystemOptions fso;
    protected FileObject rootFo = null;
    protected final Object lock = new Object();

    public StoreFileSystem(String uri, String parameters) throws URISyntaxException {
        this(uri, parameters, false);
    }

    public StoreFileSystem(String uri, String parameters, boolean autoCreateRoot) throws URISyntaxException {
        this.uri = new URI(uri);
        this.parameters = parameters;
        this.autoCreateRoot = autoCreateRoot;
        fso = new FileSystemOptions();
    }

    protected abstract void configureOptions() throws FileSystemException;

    private void initRootFileObject() throws FileSystemException {
        configureOptions();
        FileSystemManager fsm = VFS.getManager();
        FileObject fo = fsm.resolveFile(uri.toString(), fso);
        if (autoCreateRoot && !fo.exists())
            fo.createFolder();
        if (fo.exists())
            rootFo = fo;
    }

    public FileObject getRootFileObject() throws FileSystemException {
        synchronized (lock) {
            if (rootFo == null)
                initRootFileObject();
        }
        return rootFo;
    }

    public FileObject getRelativeFileObject(String path) throws FileSystemException {
        String absPath = uri.getPath() + path;
        return getRootFileObject().resolveFile(absPath);
    }

    public String getRelativePath(FileObject fo) {
        return relativizePath(fo.getName().getPath());
    }

    public String relativizePath(String path) {
        return PathUtils.ensureBeginningSeparator(StringUtils.removeStart(path, uri.getPath()));
    }
}