Example usage for org.apache.commons.vfs2 FileObject exists

Introduction

In this page you can find the example usage for org.apache.commons.vfs2 FileObject exists.

Prototype

boolean exists() throws FileSystemException;

Source Link

Document

Determines if this file exists.

Usage

From source file:sftpexamples.SftpUtility.java

/**
 * Method to check if the remote file exists in the specified remote
 * location/*from  ww  w  .  ja va 2  s . com*/
 *
 * @param hostName HostName of the server
 * @param username UserName to login
 * @param password Password to login
 * @param remoteFilePath remoteFilePath. Should contain the entire remote
 * file path - Directory and Filename with / as separator
 * @return Returns if the file exists in the specified remote location
 */
public static boolean exist(String hostName, String username, String password, String remoteFilePath) {
    StandardFileSystemManager manager = new StandardFileSystemManager();

    try {
        manager.init();

        // Create remote object
        FileObject remoteFile = manager.resolveFile(
                createConnectionString(hostName, username, password, remoteFilePath), createDefaultOptions());

        System.out.println("File exist: " + remoteFile.exists());

        return remoteFile.exists();
    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        manager.close();
    }
}

From source file:tain.kr.test.vfs.v01.Shell.java

/**
 * Does a 'cp' command.//from   w  w  w  .j a  v a2s .c  o  m
 */
private void cp(final String[] cmd) throws Exception {

    if (cmd.length < 3) {
        throw new Exception("USAGE: cp <src> <dest>");
    }

    final FileObject src = mgr.resolveFile(cwd, cmd[1]);
    FileObject dest = mgr.resolveFile(cwd, cmd[2]);

    if (dest.exists() && dest.getType() == FileType.FOLDER) {
        dest = dest.resolveFile(src.getName().getBaseName());
    }

    dest.copyFrom(src, Selectors.SELECT_ALL);
}

From source file:tain.kr.test.vfs.v01.Shell.java

/**
 * Does a 'cd' command./*from  ww w  . j  ava  2  s.com*/
 * If the taget directory does not exist, a message is printed to <code>System.err</code>.
 */
private void cd(final String[] cmd) throws Exception {

    final String path;
    if (cmd.length > 1) {
        path = cmd[1];
    } else {
        path = System.getProperty("user.home");
    }

    // Locate and validate the folder
    final FileObject tmp = mgr.resolveFile(cwd, path);
    if (tmp.exists()) {
        cwd = tmp;
    } else {
        System.out.println("Folder does not exist: " + tmp.getName());
    }
    System.out.println("Current folder is " + cwd.getName());
}

From source file:tain.kr.test.vfs.v01.Shell.java

/**
 * Does a 'touch' command.//from   w  w w . j  a  v  a 2s  . c o  m
 */
private void touch(final String[] cmd) throws Exception {

    if (cmd.length < 2) {
        throw new Exception("USAGE: touch <path>");
    }

    final FileObject file = mgr.resolveFile(cwd, cmd[1]);

    if (!file.exists()) {
        file.createFile();
    }
    file.getContent().setLastModifiedTime(System.currentTimeMillis());
}

From source file:tain.kr.test.vfs.v01.ShowProperties.java

private static void test01(String[] args) throws Exception {

    if (flag)/*from  w w  w  .  ja v  a 2s .  c  o m*/
        new ShowProperties();

    if (flag) {

        if (args.length == 0) {
            System.err.println("Please pass the name of a file as parameter.");
            System.err.println("e.g. java org.apache.commons.vfs2.example.ShowProperties LICENSE.txt");
            return;
        }

        for (final String arg : args) {
            try {
                final FileSystemManager mgr = VFS.getManager();
                System.out.println();
                System.out.println("Parsing   : " + arg);
                final FileObject file = mgr.resolveFile(arg);
                System.out.println("URL       : " + file.getURL());
                System.out.println("getName() : " + file.getName());
                System.out.println("BaseName  : " + file.getName().getBaseName());
                System.out.println("Extension : " + file.getName().getExtension());
                System.out.println("Path      : " + file.getName().getPath());
                System.out.println("Scheme    : " + file.getName().getScheme());
                System.out.println("URI       : " + file.getName().getURI());
                System.out.println("Root URI  : " + file.getName().getRootURI());
                System.out.println("Parent    : " + file.getName().getParent());
                System.out.println("Type      : " + file.getType());
                System.out.println("Exists    : " + file.exists());
                System.out.println("Readable  : " + file.isReadable());
                System.out.println("Writeable : " + file.isWriteable());
                System.out.println("Root path : " + file.getFileSystem().getRoot().getName().getPath());

                if (file.exists()) {
                    if (file.getType().equals(FileType.FILE)) {
                        System.out.println("Size: " + file.getContent().getSize() + " bytes");

                    } else if (file.getType().equals(FileType.FOLDER) && file.isReadable()) {

                        final FileObject[] children = file.getChildren();
                        System.out.println("Directory with " + children.length + " files");

                        for (int iterChildren = 0; iterChildren < children.length; iterChildren++) {
                            System.out.println("#" + iterChildren + ": " + children[iterChildren].getName());
                            if (iterChildren > SHOW_MAX) {
                                break;
                            }
                        }
                    }

                    System.out.println("Last modified: " + DateFormat.getInstance()
                            .format(new Date(file.getContent().getLastModifiedTime())));
                } else {
                    System.out.println("The file does not exist");
                }

                file.close();
            } catch (final FileSystemException ex) {
                ex.printStackTrace();
            }
        }
    }
}

From source file:tain.kr.test.vfs.v01.TestVfs2FilehandleService.java

@Test
public void testCreateFile() throws Exception {

    FileSystemManager manager = VFS.getManager();

    FileObject baseDir = manager.resolveFile(this.absoluteFilePath);
    final FileObject file = manager.resolveFile(baseDir, "testfolder/file1.txt");

    // delete a file
    file.delete(Selectors.SELECT_FILES);
    assertFalse(file.exists());

    // create a file
    file.createFile();/*  w  ww  .ja  v a 2  s.  c o m*/
    assertTrue(file.exists());
}

From source file:tain.kr.test.vfs.v01.TestVfs2FilehandleService.java

@Test
public void testAccessFile() throws Exception {

    FileSystemManager manager = VFS.getManager();

    FileObject baseDir = manager.resolveFile(this.absoluteFilePath);
    FileObject file = manager.resolveFile(baseDir, "testfolder/file1.txt");

    //   /*from ww  w . j  a  v a 2 s  .  c o m*/
    file.delete(Selectors.SELECT_FILES);
    assertFalse(file.exists());

    //  
    file.createFile();
    assertTrue(file.exists());

    FileContent fileContent = file.getContent();
    assertEquals(0, fileContent.getSize());

    //  
    String string = "test.";
    OutputStream os = fileContent.getOutputStream();

    try {
        os.write(string.getBytes());
        os.flush();
    } finally {
        if (os != null) {
            try {
                os.close();
            } catch (Exception ignore) {
                // no-op
            }
        }
    }
    assertNotSame(0, fileContent.getSize());

    //  
    StringBuffer sb = new StringBuffer();
    FileObject writtenFile = manager.resolveFile(baseDir, "testfolder/file1.txt");
    FileContent writtenContents = writtenFile.getContent();
    InputStream is = writtenContents.getInputStream();

    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));

        String line = "";
        while ((line = reader.readLine()) != null) {
            sb.append(line);
        }
    } finally {
        if (is != null) {
            try {
                is.close();
            } catch (Exception ignore) {
                // no-op
            }
        }
    }

    //  
    assertEquals(sb.toString(), string);
}

From source file:tw.edu.sinica.iis.SSHadoop.SSHSftp.java

public void sftpDelete(final String remoteDir) {
    try {//from w w  w .j a  v  a 2  s.c o m
        manager.init();

        FileObject remote = manager.resolveFile(genConnectString() + remoteDir, opts.getOptions());

        if (remote.exists()) {
            remote.delete(Selectors.SELECT_ALL);
        }

    } catch (FileSystemException e) {
        e.printStackTrace();
    } finally {
        manager.close();
    }
}