本文整理了Java中org.apache.hadoop.fs.Path.isRoot()方法的一些代码示例，展示了Path.isRoot()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Path.isRoot()方法的具体详情如下：
包路径：org.apache.hadoop.fs.Path
类名称：Path
方法名：isRoot

Path.isRoot介绍

暂无

代码示例

代码示例来源：origin: apache/hbase

private boolean isRootFolder(String targetBackupDir) {
 Path p = new Path(targetBackupDir);
 return p.isRoot();
}

代码示例来源：origin: prestodb/presto

private static boolean isChildDirectory(Path parentDirectory, Path childDirectory)
  {
    if (parentDirectory.equals(childDirectory)) {
      return true;
    }
    if (childDirectory.isRoot()) {
      return false;
    }
    return isChildDirectory(parentDirectory, childDirectory.getParent());
  }
}

代码示例来源：origin: apache/incubator-gobblin

/**
 * Returns the root path for the specified path.
 *
 * @see Path
 */
public static Path getRootPath(Path path) {
 if (path.isRoot()) {
  return path;
 }
 return getRootPath(path.getParent());
}

代码示例来源：origin: org.apache.hadoop/hadoop-common

/**
 * 
 * @param path
 * @return return full path including the chroot
 */
protected Path fullPath(final Path path) {
 super.checkPath(path);
 return new Path((chRootPathPart.isRoot() ? "" : chRootPathPartString)
   + path.toUri().getPath());
}

代码示例来源：origin: org.apache.hadoop/hadoop-common

/** Returns true if the target is an ancestor of the source. */
private boolean isAncestor(PathData source, PathData target) {
 for (Path parent = source.path; (parent != null) && !parent.isRoot();
   parent = parent.getParent()) {
  if (parent.equals(target.path)) {
   return true;
  }
 }
 return false;
}

代码示例来源：origin: org.apache.hadoop/hadoop-common

/**
 * @param path
 * @return  full path including the chroot 
 */
protected Path fullPath(final Path path) {
 super.checkPath(path);
 return path.isAbsolute() ? 
   new Path((chRootPathPart.isRoot() ? "" : chRootPathPartString)
     + path.toUri().getPath()) :
   new Path(chRootPathPartString + workingDir.toUri().getPath(), path);
}

代码示例来源：origin: org.apache.hadoop/hadoop-common

/**
 * Strip out the root from the path.
 * @param p - fully qualified path p
 * @return -  the remaining path  without the beginning /
 * @throws IOException if the p is not prefixed with root
 */
String stripOutRoot(final Path p) throws IOException {
 try {
  checkPath(p);
 } catch (IllegalArgumentException e) {
  throw new IOException("Internal Error - path " + p +
    " should have been with URI: " + myUri);
 }
 String pathPart = p.toUri().getPath();
 return (pathPart.length() == chRootPathPartString.length()) ? "" : pathPart
   .substring(chRootPathPartString.length() + (chRootPathPart.isRoot() ? 0 : 1));
}

代码示例来源：origin: apache/incubator-gobblin

/**
 * org.apache.hadoop.fs.Path assumes that there separator in file system naming and "/" is the separator.
 * When org.apache.hadoop.fs.Path sees "/" in path String, it splits into parent and name. As fileID is a random
 * String determined by Google and it can contain "/" itself, this method check if parent and name is separated and
 * restore "/" back to file ID.
 *
 * @param p
 * @return
 */
public static String toFileId(Path p) {
 if (p.isRoot()) {
  return "";
 }
 final String format = "%s" + Path.SEPARATOR + "%s";
 if (p.getParent() != null && StringUtils.isEmpty(p.getParent().getName())) {
  return p.getName();
 }
 return String.format(format, toFileId(p.getParent()), p.getName());
}

代码示例来源：origin: org.apache.hadoop/hadoop-common

/**
 *  
 * Strip out the root from the path.
 * 
 * @param p - fully qualified path p
 * @return -  the remaining path  without the beginning /
 */
public String stripOutRoot(final Path p) {
 try {
  checkPath(p);
 } catch (IllegalArgumentException e) {
  throw new RuntimeException("Internal Error - path " + p +
    " should have been with URI" + myUri);
 }
 String pathPart = p.toUri().getPath();
 return  (pathPart.length() == chRootPathPartString.length()) ?
   "" : pathPart.substring(chRootPathPartString.length() +
     (chRootPathPart.isRoot() ? 0 : 1));
}

代码示例来源：origin: apache/hbase

/**
 * Create the output folder and optionally set ownership.
 */
private void createOutputPath(final Path path) throws IOException {
 if (filesUser == null && filesGroup == null) {
  outputFs.mkdirs(path);
 } else {
  Path parent = path.getParent();
  if (!outputFs.exists(parent) && !parent.isRoot()) {
   createOutputPath(parent);
  }
  outputFs.mkdirs(path);
  if (filesUser != null || filesGroup != null) {
   // override the owner when non-null user/group is specified
   outputFs.setOwner(path, filesUser, filesGroup);
  }
  if (filesMode > 0) {
   outputFs.setPermission(path, new FsPermission(filesMode));
  }
 }
}

代码示例来源：origin: apache/hbase

if (wlPath.isRoot()) {
 return(true);

代码示例来源：origin: org.apache.hadoop/hadoop-mapreduce-client-core

/**
 * Validate that the file status cache contains all and only entries for a
 * given set of paths up to a common parent.
 *
 * @param statCache the cache
 * @param top the common parent at which to stop digging
 * @param paths the paths to compare against the cache
 */
private void checkCacheEntries(Map<URI, FileStatus> statCache, Path top,
  Path... paths) {
 Set<URI> expected = new HashSet<>();
 for (Path path : paths) {
  Path p = fs.makeQualified(path);
  while (!p.isRoot() && !p.equals(top)) {
   expected.add(p.toUri());
   p = p.getParent();
  }
  expected.add(p.toUri());
 }
 Set<URI> uris = statCache.keySet();
 Set<URI> missing = new HashSet<>(uris);
 Set<URI> extra = new HashSet<>(expected);
 missing.removeAll(expected);
 extra.removeAll(uris);
 assertTrue("File status cache does not contain an entries for " + missing,
   missing.isEmpty());
 assertTrue("File status cache contains extra extries: " + extra,
   extra.isEmpty());
}

代码示例来源：origin: com.github.jiayuhan-it/hadoop-common

/**
 * 
 * @param path
 * @return return full path including the chroot
 */
protected Path fullPath(final Path path) {
 super.checkPath(path);
 return new Path((chRootPathPart.isRoot() ? "" : chRootPathPartString)
   + path.toUri().getPath());
}

代码示例来源：origin: com.github.jiayuhan-it/hadoop-common

/** Returns true if the target is an ancestor of the source. */
private boolean isAncestor(PathData source, PathData target) {
 for (Path parent = source.path; (parent != null) && !parent.isRoot();
   parent = parent.getParent()) {
  if (parent.equals(target.path)) {
   return true;
  }
 }
 return false;
}

代码示例来源：origin: io.hops/hadoop-common

/** Returns true if the target is an ancestor of the source. */
private boolean isAncestor(PathData source, PathData target) {
 for (Path parent = source.path; (parent != null) && !parent.isRoot();
   parent = parent.getParent()) {
  if (parent.equals(target.path)) {
   return true;
  }
 }
 return false;
}

代码示例来源：origin: ch.cern.hadoop/hadoop-common

/**
 * 
 * @param path
 * @return return full path including the chroot
 */
protected Path fullPath(final Path path) {
 super.checkPath(path);
 return new Path((chRootPathPart.isRoot() ? "" : chRootPathPartString)
   + path.toUri().getPath());
}

代码示例来源：origin: io.hops/hadoop-common

/**
 * @param path
 * @return  full path including the chroot 
 */
protected Path fullPath(final Path path) {
 super.checkPath(path);
 return path.isAbsolute() ? 
   new Path((chRootPathPart.isRoot() ? "" : chRootPathPartString)
     + path.toUri().getPath()) :
   new Path(chRootPathPartString + workingDir.toUri().getPath(), path);
}

代码示例来源：origin: com.github.jiayuhan-it/hadoop-common

/**
 * @param path
 * @return  full path including the chroot 
 */
protected Path fullPath(final Path path) {
 super.checkPath(path);
 return path.isAbsolute() ? 
   new Path((chRootPathPart.isRoot() ? "" : chRootPathPartString)
     + path.toUri().getPath()) :
   new Path(chRootPathPartString + workingDir.toUri().getPath(), path);
}

代码示例来源：origin: ch.cern.hadoop/hadoop-common

/**
 * @param path
 * @return  full path including the chroot 
 */
protected Path fullPath(final Path path) {
 super.checkPath(path);
 return path.isAbsolute() ? 
   new Path((chRootPathPart.isRoot() ? "" : chRootPathPartString)
     + path.toUri().getPath()) :
   new Path(chRootPathPartString + workingDir.toUri().getPath(), path);
}

代码示例来源：origin: org.apache.hadoop/hadoop-azure

/**
 * Recursive discovery of path depth
 * @param path path to measure.
 * @return depth, where "/" == 0.
 */
int depth(Path path) {
 if (path.isRoot()) {
  return 0;
 } else {
  return 1 + depth(path.getParent());
 }
}