org.sonatype.gshell.vfs.provider.truezip.TruezipFileSystem.java Source code

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Here is the source code for org.sonatype.gshell.vfs.provider.truezip.TruezipFileSystem.java

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/*
 * Copyright (c) 2009-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.sonatype.gshell.vfs.provider.truezip;

import de.schlichtherle.io.ArchiveException;
import de.schlichtherle.io.File;
import org.apache.commons.vfs.FileName;
import org.apache.commons.vfs.FileObject;
import org.apache.commons.vfs.FileSelector;
import org.apache.commons.vfs.FileSystem;
import org.apache.commons.vfs.FileSystemException;
import org.apache.commons.vfs.FileSystemOptions;
import org.apache.commons.vfs.provider.AbstractFileSystem;

import java.io.FilePermission;
import java.util.Collection;

/**
 * <h href="https://truezip.dev.java.net">TrueZIP</a> file system.
 *
 * @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
 * @since 2.0
 */
public class TruezipFileSystem extends AbstractFileSystem implements FileSystem {
    public TruezipFileSystem(final FileName rootName, final String rootFile, final FileSystemOptions opts) {
        super(rootName, null, opts);
    }

    protected TruezipFileSystem(final FileName rootName, final FileObject file,
            final FileSystemOptions fileSystemOptions) throws FileSystemException {
        super(rootName, file, fileSystemOptions);
    }

    /**
     * Creates a file object.
     */
    protected FileObject createFile(final FileName name) throws FileSystemException {
        // Create the file
        return new TruezipFileObject(this, name);
    }

    /**
     * Returns the capabilities of this file system.
     */
    protected void addCapabilities(final Collection caps) {
        // noinspection unchecked
        caps.addAll(TruezipFileProvider.CAPABILITIES);
    }

    /**
     * Creates a temporary local copy of a file and its descendants.
     */
    protected java.io.File doReplicateFile(final FileObject fileObject, final FileSelector selector)
            throws Exception {
        final TruezipFileObject localFile = (TruezipFileObject) fileObject;
        final File file = localFile.getLocalFile();

        final SecurityManager sm = System.getSecurityManager();
        if (sm != null) {
            final FilePermission requiredPerm = new FilePermission(file.getAbsolutePath(), "read");
            sm.checkPermission(requiredPerm);
        }

        return file;
    }

    protected void doCloseCommunicationLink() {
        try {
            File.umount();
        } catch (ArchiveException e) {
            throw new RuntimeException(e);
        }
    }

}