Examples of org.apache.commons.vfs.FileName

org.apache.commons.vfs.FileName
Represents a file name. File names are immutable, and work correctly as keys in hash tables. @author Adam Murdoch @see FileObject

     * Finds a file in this file system.
     */
    public FileObject resolveFile(final String nameStr) throws FileSystemException
    {
        // Resolve the name, and create the file
        final FileName name = getFileSystemManager().resolveName(rootName, nameStr);
        return resolveFile(name);
    }

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    public FileObject findFile(final FileObject baseFile,
                               final String uri,
                               final FileSystemOptions fileSystemOptions) throws FileSystemException
    {
        // Parse the URI
        final FileName name;
        try
        {
            name = parseUri(baseFile!=null?baseFile.getName():null, uri);
        }
        catch (FileSystemException exc)

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     */
    protected FileObject findFile(final FileName name, final FileSystemOptions fileSystemOptions)
        throws FileSystemException
    {
    // Check in the cache for the file system
    final FileName rootName = getContext().getFileSystemManager().resolveName(name, FileName.ROOT_PATH);
    
    FileSystem fs;
    synchronized (this)
    {
      fs = findFileSystem(rootName, fileSystemOptions);

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     */
    protected FileObject createFile(final FileName name)
        throws Exception
    {
        // Find the file that the name points to
        final FileName junctionPoint = getJunctionForFile(name);
        final FileObject file;
        if (junctionPoint != null)
        {
            // Resolve the real file
            final FileObject junctionFile = (FileObject) junctions.get(junctionPoint);
            final String relName = junctionPoint.getRelativeName(name);
            file = junctionFile.resolveFile(relName, NameScope.DESCENDENT_OR_SELF);
        }
        else
        {
            file = null;

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     */
    public void addJunction(final String junctionPoint,
                            final FileObject targetFile)
        throws FileSystemException
    {
        final FileName junctionName = getFileSystemManager().resolveName(getRootName(), junctionPoint);


        // Check for nested junction - these are not supported yet
        if (getJunctionForFile(junctionName) != null)
        {
            throw new FileSystemException("vfs.impl/nested-junction.error", junctionName);
        }


        try
        {
            // Add to junction table
            junctions.put(junctionName, targetFile);


            // Attach to file
            final DelegateFileObject junctionFile = (DelegateFileObject) getFileFromCache(junctionName);
            if (junctionFile != null)
            {
                junctionFile.setFile(targetFile);
            }


            // Create ancestors of junction point
            FileName childName = junctionName;
            boolean done = false;
            for (FileName parentName = childName.getParent();
                 !done && parentName != null;
                 childName = parentName, parentName = parentName.getParent())
            {
                DelegateFileObject file = (DelegateFileObject) getFileFromCache(parentName);
                if (file == null)

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     * Removes a junction from this file system.
     */
    public void removeJunction(final String junctionPoint)
        throws FileSystemException
    {
        final FileName junctionName = getFileSystemManager().resolveName(getRootName(), junctionPoint);
        junctions.remove(junctionName);


        // TODO - remove from parents of junction point
        // TODO - detach all cached children of the junction point from their real file
    }

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        }


        // Find matching junction
        for (Iterator iterator = junctions.keySet().iterator(); iterator.hasNext();)
        {
            final FileName junctionPoint = (FileName) iterator.next();
            if (junctionPoint.isDescendent(name))
            {
                return junctionPoint;
            }
        }

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     * Creates a virtual file system, with the supplied file as its root.
     */
    public FileObject createFileSystem(final FileObject rootFile)
        throws FileSystemException
    {
        final FileName rootName =
            getContext().getFileSystemManager().resolveName(rootFile.getName(), FileName.ROOT_PATH);
        // final FileName rootName =
        //    new BasicFileName(rootFile.getName(), FileName.ROOT_PATH);
        final VirtualFileSystem fs = new VirtualFileSystem(rootName, rootFile.getFileSystem().getFileSystemOptions());
        addComponent(fs);

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    /**
     * Creates an empty virtual file system.
     */
    public FileObject createFileSystem(final String rootUri) throws FileSystemException
    {
        final FileName rootName =
            new VirtualFileName(rootUri, FileName.ROOT_PATH, FileType.FOLDER);
        // final FileName rootName =
        //    new BasicFileName(rootUri, FileName.ROOT_PATH);
        final VirtualFileSystem fs = new VirtualFileSystem(rootName, null);
        addComponent(fs);

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    /**
     * find the root of the filesystem
     */
    public FileName getRoot()
    {
        FileName root = this;
        while (root.getParent() != null)
        {
            root = root.getParent();
        }


        return root;
    }

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