Example usage for org.apache.commons.vfs FileSystemManager canCreateFileSystem

Introduction

In this page you can find the example usage for org.apache.commons.vfs FileSystemManager canCreateFileSystem.

Prototype

public boolean canCreateFileSystem(FileObject file) throws FileSystemException;

Source Link

Document

Determines if a layered file system can be created for a given file.

Usage

From source file:org.geoserver.importer.VFSWorker.java

/**
 * //from   w ww  .j  av a  2 s  . c  o  m
 * @param archiveFile
 * @param filter
 * 
 * @return
 */
public List<String> listFiles(final File archiveFile, final FilenameFilter filter) {
    FileSystemManager fsManager;
    try {
        fsManager = VFS.getManager();
        String absolutePath = resolveArchiveURI(archiveFile);
        FileObject resolvedFile = fsManager.resolveFile(absolutePath);

        FileSelector fileSelector = new FileSelector() {
            /**
             * @see org.apache.commons.vfs.FileSelector#traverseDescendents(org.apache.commons.vfs.FileSelectInfo)
             */
            public boolean traverseDescendents(FileSelectInfo folderInfo) throws Exception {
                return true;
            }

            /**
             * @see org.apache.commons.vfs.FileSelector#includeFile(org.apache.commons.vfs.FileSelectInfo)
             */
            public boolean includeFile(FileSelectInfo fileInfo) throws Exception {
                File folder = archiveFile.getParentFile();
                String name = fileInfo.getFile().getName().getFriendlyURI();
                return filter.accept(folder, name);
            }
        };

        FileObject fileSystem;
        if (fsManager.canCreateFileSystem(resolvedFile)) {
            fileSystem = fsManager.createFileSystem(resolvedFile);
        } else {
            fileSystem = resolvedFile;
        }
        LOGGER.fine("Listing spatial data files archived in " + archiveFile.getName());
        FileObject[] containedFiles = fileSystem.findFiles(fileSelector);
        List<String> names = new ArrayList<String>(containedFiles.length);
        for (FileObject fo : containedFiles) {
            // path relative to its filesystem (ie, to the archive file)
            String pathDecoded = fo.getName().getPathDecoded();
            names.add(pathDecoded);
        }
        LOGGER.fine("Found " + names.size() + " spatial data files in " + archiveFile.getName() + ": " + names);
        return names;
    } catch (FileSystemException e) {
        e.printStackTrace();
    } finally {
        // fsManager.closeFileSystem(fileSystem.getFileSystem());
    }
    return Collections.emptyList();
}

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From source file:org.geoserver.importer.VFSWorker.java

/**
 * Extracts the archive file {@code archiveFile} to {@code targetFolder}; both shall previously
 * exist./*from ww  w.  j a va  2  s .  c  o  m*/
 */
public void extractTo(File archiveFile, File targetFolder) throws IOException {

    FileSystemManager manager = VFS.getManager();
    String sourceURI = resolveArchiveURI(archiveFile);
    // String targetURI = resolveArchiveURI(targetFolder);
    FileObject source = manager.resolveFile(sourceURI);
    if (manager.canCreateFileSystem(source)) {
        source = manager.createFileSystem(source);
    }
    FileObject target = manager.createVirtualFileSystem(manager.resolveFile(targetFolder.getAbsolutePath()));

    FileSelector selector = new AllFileSelector() {
        @Override
        public boolean includeFile(FileSelectInfo fileInfo) {
            LOGGER.fine("Uncompressing " + fileInfo.getFile().getName().getFriendlyURI());
            return true;
        }
    };
    target.copyFrom(source, selector);
}

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