Example usage for java.io File list

Introduction

In this page you can find the example usage for java.io File list.

Prototype

public String[] list() 

Source Link

Document

Returns an array of strings naming the files and directories in the directory denoted by this abstract pathname.

Usage

From source file:com.cloudera.sqoop.shims.ShimLoader.java

/**
 * Look through the shim directory for a jar matching 'jarPattern'
 * and classload it./*ww  w .  j a  v a 2s  .  c  om*/
 * @param jarPattern a regular expression which the shim jar's filename
 * must match.
 * @param className a class to classload from the jar.
 */
private static void loadMatchingShimJar(String jarPattern, String className) throws IOException {
    String jarFilename;

    String shimDirName = System.getProperty(SHIM_JAR_DIR_PROPERTY, ".");
    File shimDir = new File(shimDirName);
    if (!shimDir.exists()) {
        throw new IOException("No such shim directory: " + shimDirName);
    }

    String[] candidates = shimDir.list();
    if (null == candidates) {
        throw new IOException("Could not list shim directory: " + shimDirName);
    }

    for (String candidate : candidates) {
        if (candidate.matches(jarPattern)) {
            LOG.debug("Found jar matching pattern " + jarPattern + ": " + candidate);
            File jarFile = new File(shimDir, candidate);
            String jarFileName = jarFile.toString();
            ClassLoaderStack.addJarFile(jarFileName, className);
            LOG.debug("Successfully pushed classloader for jar: " + jarFileName);
            return;
        }
    }

    throw new IOException("Could not load shim jar for pattern: " + jarPattern);
}

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From source file:com.photon.phresco.util.FileUtil.java

public static void copyFolder(File src, File dest) throws IOException {
    if (src.isDirectory()) {
        //if directory not exists, create it
        if (!dest.exists()) {
            dest.mkdir();//from w  w w. ja  va 2s.  c o  m
        }

        //list all the directory contents
        String files[] = src.list();

        for (String file : files) {
            //construct the src and dest file structure
            File srcFile = new File(src, file);
            File destFile = new File(dest, file);
            //recursive copy

            if (!Constants.MACOSX.equals(file)) {
                copyFolder(srcFile, destFile);
            }
        }
    } else {
        //if file, then copy it
        //Use bytes stream to support all file types
        InputStream in = new FileInputStream(src);
        OutputStream out = new FileOutputStream(dest);

        byte[] buffer = new byte[BUFFER_SIZE];

        int length;
        //copy the file content in bytes 
        while ((length = in.read(buffer)) > 0) {
            out.write(buffer, 0, length);
        }
        in.close();
        out.close();
    }
}

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From source file:edu.clemson.cs.nestbed.common.util.ZipUtils.java

private static void zipDirectory(File directory, String name, ZipOutputStream zos) throws IOException {
    // *MUST* append the trailing slash for a ZipEntry to identify an
    // entry as a directory.
    name += "/";//from  w ww  .j a  va  2 s .  c o m

    zos.putNextEntry(new ZipEntry(name));
    zos.closeEntry();

    String[] entryList = directory.list();

    for (int i = 0; i < entryList.length; ++i) {
        File f = new File(directory, entryList[i]);

        if (f.isDirectory()) {
            zipDirectory(f, name + f.getName(), zos);
        } else {
            FileInputStream fis = new FileInputStream(f);
            ZipEntry entry = new ZipEntry(name + f.getName());
            byte[] buffer = new byte[BUFFER_SIZE];
            int bytesIn = 0;

            zos.putNextEntry(entry);

            while ((bytesIn = fis.read(buffer)) != -1) {
                zos.write(buffer, 0, bytesIn);
            }

            fis.close();
            zos.closeEntry();
        }
    }
}

---

From source file:Main.java

public static void copy(File src, File dest) throws IOException {

    if (src.isDirectory()) {

        //if directory not exists, create it
        if (!dest.exists()) {
            dest.mkdir();//from   ww  w .j  a va  2  s .co  m
            System.out.println("Directory copied from " + src + "  to " + dest);
        }

        //list all the directory contents
        String files[] = src.list();

        for (int c = 0; c < files.length; c++) {
            //construct the src and dest file structure
            File srcFile = new File(src, files[c]);
            File destFile = new File(dest, files[c]);
            //recursive copy
            copy(srcFile, destFile);
        }

    } else {
        //if file, then copy it
        //Use bytes stream to support all file types
        InputStream in = new FileInputStream(src);
        OutputStream out = new FileOutputStream(dest);

        byte[] buffer = new byte[1024];

        int length;
        //copy the file content in bytes 
        while ((length = in.read(buffer)) > 0) {
            out.write(buffer, 0, length);
        }

        in.close();
        out.close();
        System.out.println("File copied from " + src + " to " + dest);
    }
}

---

From source file:Main.java

static public boolean copyAllAssertToCacheFolder(Context c) throws IOException {

    String[] files = c.getAssets().list("Devices");
    String filefolder = c.getFilesDir().toString();
    File devicefile = new File(filefolder + "/Devices/");
    devicefile.mkdirs();/*from w w w  . j  a va  2s.c  o m*/

    for (int i = 0; i < files.length; i++) {
        File devfile = new File(filefolder + "/Devices/" + files[i]);
        if (!devfile.exists()) {
            copyFileTo(c, "Devices/" + files[i], filefolder + "/Devices/" + files[i]);
        }
    }
    String[] filestr = devicefile.list();
    for (int i = 0; i < filestr.length; i++) {
        Log.i("file", filestr[i]);
    }

    return true;
}

---

From source file:at.ac.uniklu.mobile.sportal.util.Utils.java

/**
 * Recursively delete a directory and all of its content.
 * source: http://groups.google.com/group/android-developers/browse_thread/thread/e9eb0a17a3c7c768
 * @param dir//from w  ww  .j  a  v a  2  s.  c  o m
 * @return
 */
public static boolean deleteDir(File dir) {
    if (dir != null && dir.isDirectory()) {
        String[] children = dir.list();
        for (int i = 0; i < children.length; i++) {
            boolean success = deleteDir(new File(dir, children[i]));
            if (!success) {
                return false;
            }
        }
    }
    // The directory is now empty so delete it 
    return dir.delete();
}

---

From source file:net.dataforte.commons.resources.ClassUtils.java

/**
 * Returns all classes within the specified package. Supports filesystem, JARs and JBoss VFS
 * //from  w  ww  . j a  v a  2  s  . c o m
 * @param folder
 * @return
 * @throws IOException
 */
public static Class<?>[] getClassesForPackage(String pckgname) throws ClassNotFoundException {
    // This will hold a list of directories matching the pckgname.
    // There may be more than one if a package is split over multiple
    // jars/paths
    List<Class<?>> classes = new ArrayList<Class<?>>();
    ArrayList<File> directories = new ArrayList<File>();
    try {
        ClassLoader cld = Thread.currentThread().getContextClassLoader();
        if (cld == null) {
            throw new ClassNotFoundException("Can't get class loader.");
        }
        // Ask for all resources for the path
        Enumeration<URL> resources = cld.getResources(pckgname.replace('.', '/'));
        while (resources.hasMoreElements()) {
            URL res = resources.nextElement();
            if (res.getProtocol().equalsIgnoreCase("jar")) {
                JarURLConnection conn = (JarURLConnection) res.openConnection();
                JarFile jar = conn.getJarFile();
                for (JarEntry e : Collections.list(jar.entries())) {

                    if (e.getName().startsWith(pckgname.replace('.', '/')) && e.getName().endsWith(".class")
                            && !e.getName().contains("$")) {
                        String className = e.getName().replace("/", ".").substring(0, e.getName().length() - 6);
                        classes.add(Class.forName(className, true, cld));
                    }
                }
            } else if (res.getProtocol().equalsIgnoreCase("vfszip")) { // JBoss 5+
                try {
                    Object content = res.getContent();
                    Method getChildren = content.getClass().getMethod("getChildren");
                    List<?> files = (List<?>) getChildren.invoke(res.getContent());
                    Method getPathName = null;
                    for (Object o : files) {
                        if (getPathName == null) {
                            getPathName = o.getClass().getMethod("getPathName");
                        }
                        String pathName = (String) getPathName.invoke(o);
                        if (pathName.endsWith(".class")) {
                            String className = pathName.replace("/", ".").substring(0, pathName.length() - 6);
                            classes.add(Class.forName(className, true, cld));
                        }
                    }
                } catch (Exception e) {
                    throw new IOException("Error while scanning " + res.toString(), e);
                }
            } else {
                directories.add(new File(URLDecoder.decode(res.getPath(), "UTF-8")));
            }
        }
    } catch (NullPointerException x) {
        throw new ClassNotFoundException(
                pckgname + " does not appear to be a valid package (Null pointer exception)", x);
    } catch (UnsupportedEncodingException encex) {
        throw new ClassNotFoundException(
                pckgname + " does not appear to be a valid package (Unsupported encoding)", encex);
    } catch (IOException ioex) {
        throw new ClassNotFoundException(
                "IOException was thrown when trying to get all resources for " + pckgname, ioex);
    }

    // For every directory identified capture all the .class files
    for (File directory : directories) {
        if (directory.exists()) {
            // Get the list of the files contained in the package
            String[] files = directory.list();
            for (String file : files) {
                // we are only interested in .class files
                if (file.endsWith(".class")) {
                    // removes the .class extension
                    classes.add(Class.forName(pckgname + '.' + file.substring(0, file.length() - 6)));
                }
            }
        } else {
            throw new ClassNotFoundException(
                    pckgname + " (" + directory.getPath() + ") does not appear to be a valid package");
        }
    }
    Class<?>[] classesA = new Class[classes.size()];
    classes.toArray(classesA);
    return classesA;
}

---

From source file:Main.java

private static void addFileToZip(String sourceFolderPath, String sourceFilePath, String baseFolderPath,
        ZipOutputStream zos) throws Exception {

    File item = new File(sourceFilePath);
    if (item == null || !item.exists())
        return; //skip if the file is not exist
    if (isSymLink(item))
        return; // do nothing to symbolic links.

    if (baseFolderPath == null)
        baseFolderPath = "";

    if (item.isDirectory()) {
        for (String subItem : item.list()) {
            addFileToZip(sourceFolderPath + File.separator + item.getName(),
                    sourceFilePath + File.separator + subItem, baseFolderPath, zos);
        }// w  w  w .j a  v  a 2 s  .c  o m
    } else {
        byte[] buf = new byte[102400]; //100k buffer
        int len;
        FileInputStream inStream = new FileInputStream(sourceFilePath);
        if (baseFolderPath.equals("")) //sourceFiles in absolute path, zip the file with absolute path
            zos.putNextEntry(new ZipEntry(sourceFilePath));
        else {//relative path
            String relativePath = sourceFilePath.substring(baseFolderPath.length());
            zos.putNextEntry(new ZipEntry(relativePath));
        }

        while ((len = inStream.read(buf)) > 0) {
            zos.write(buf, 0, len);
        }

    }
}

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From source file:com.kylinolap.metadata.tool.HiveSourceTableMgmt.java

/**
 * @param tables//w ww.  ja va2  s .  c o  m
 */
public static String reloadHiveTable(String tables) {
    // Rewrite the table string
    String[] tokens = StringUtils.split(tables, ",");
    StringBuffer buff = new StringBuffer();
    for (int i = 0; i < tokens.length; i++) {
        String token = tokens[i].trim();
        if (StringUtils.isNotEmpty(token)) {
            buff.append(";");
            buff.append("show table extended like " + token);
        }
    }
    String hiveCommand = buff.toString();
    if (StringUtils.isEmpty(hiveCommand)) {
        throw new IllegalArgumentException("The required tabes is empty");
    }
    // Call shell to generate source tabe
    String tableMetaDir = "";
    try {
        tableMetaDir = callGenerateCommand(hiveCommand);
    } catch (IOException e) {
        e.printStackTrace();
        throw new IllegalArgumentException("Failed to get metadata from upstream, for tables " + tables, e);
    }
    // Update Metadata
    if (StringUtils.isEmpty(tableMetaDir)) {
        throw new IllegalArgumentException("Failed to get metadata from upstream, for tables " + tables);
    }
    File dir = new File(tableMetaDir);
    if (!dir.exists() || !dir.isDirectory() || dir.list().length == 0) {
        throw new IllegalArgumentException("Nothing found from path " + tableMetaDir);
    }

    copyToMetaTable(tableMetaDir);

    return tableMetaDir;
}

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From source file:io.druid.data.input.impl.prefetch.PrefetchableTextFilesFirehoseFactoryTest.java

private static void assertNumRemainingCacheFiles(File firehoseTmpDir, int expectedNumFiles) {
    final String[] files = firehoseTmpDir.list();
    Assert.assertNotNull(files);/*from w w  w  .  ja v  a2 s .  c  o  m*/
    Assert.assertEquals(expectedNumFiles, files.length);
}

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