FilterFileSystem (Apache Hadoop Main 3.0.0-alpha2-SNAPSHOT API)

java.lang.Object
- org.apache.hadoop.conf.Configured
- - org.apache.hadoop.fs.FileSystem
  - - org.apache.hadoop.fs.FilterFileSystem

すべての実装されたインタフェース:

Closeable, AutoCloseable, Configurable

直系の既知のサブクラス:

ChecksumFileSystem
```
@InterfaceAudience.Public
 @InterfaceStability.Stable
public class FilterFileSystem
extends FileSystem
```
A FilterFileSystem contains some other file system, which it uses as its basic file system, possibly transforming the data along the way or providing additional functionality. The class FilterFileSystem itself simply overrides all methods of FileSystem with versions that pass all requests to the contained file system. Subclasses of FilterFileSystem may further override some of these methods and may also provide additional methods and fields.

フィールドのサマリー

フィールド
修飾子とタイプフィールドと説明

protected FileSystem fs

protected String swapScheme
- クラスから継承されたフィールド org.apache.hadoop.fs.FileSystem
  DEFAULT_FS, FS_DEFAULT_NAME_KEY, LOG, SHUTDOWN_HOOK_PRIORITY, statistics, TRASH_PREFIX

フィールド
修飾子とタイプ	フィールドと説明
`protected FileSystem`	`fs`
`protected String`	`swapScheme`

コンストラクタのサマリー

コンストラクタ
コンストラクタと説明

FilterFileSystem()

FilterFileSystem(FileSystem fs)

コンストラクタ
コンストラクタと説明
`FilterFileSystem()`
`FilterFileSystem(FileSystem fs)`

メソッドのサマリー

すべてのメソッドインスタンス・メソッド concreteメソッド
修飾子とタイプ	メソッドと説明
`void`	`access(Path path, FsAction mode)` Checks if the user can access a path.
`FSDataOutputStream`	`append(Path f, int bufferSize, Progressable progress)` Append to an existing file (optional operation).
`protected URI`	`canonicalizeUri(URI uri)` Canonicalize the given URI.
`protected void`	`checkPath(Path path)` Check that a Path belongs to this FileSystem.
`void`	`close()` No more filesystem operations are needed.
`void`	`completeLocalOutput(Path fsOutputFile, Path tmpLocalFile)` Called when we're all done writing to the target.
`void`	`concat(Path f, Path[] psrcs)` Concat existing files together.
`void`	`copyFromLocalFile(boolean delSrc, boolean overwrite, Path[] srcs, Path dst)` The src files are on the local disk.
`void`	`copyFromLocalFile(boolean delSrc, boolean overwrite, Path src, Path dst)` The src file is on the local disk.
`void`	`copyFromLocalFile(boolean delSrc, Path src, Path dst)` The src file is on the local disk.
`void`	`copyToLocalFile(boolean delSrc, Path src, Path dst)` The src file is under FS, and the dst is on the local disk.
`FSDataOutputStream`	`create(Path f, FsPermission permission, boolean overwrite, int bufferSize, short replication, long blockSize, Progressable progress)` Create an FSDataOutputStream at the indicated Path with write-progress reporting.
`FSDataOutputStream`	`create(Path f, FsPermission permission, EnumSet<CreateFlag> flags, int bufferSize, short replication, long blockSize, Progressable progress, org.apache.hadoop.fs.Options.ChecksumOpt checksumOpt)` Create an FSDataOutputStream at the indicated Path with a custom checksum option
`FSDataOutputStream`	`createNonRecursive(Path f, FsPermission permission, EnumSet<CreateFlag> flags, int bufferSize, short replication, long blockSize, Progressable progress)` Opens an FSDataOutputStream at the indicated Path with write-progress reporting.
`Path`	`createSnapshot(Path path, String snapshotName)` Create a snapshot
`void`	`createSymlink(Path target, Path link, boolean createParent)` See `FileContext.createSymlink(Path, Path, boolean)`
`boolean`	`delete(Path f, boolean recursive)` Delete a file
`void`	`deleteSnapshot(Path path, String snapshotName)` Delete a snapshot of a directory
`AclStatus`	`getAclStatus(Path path)` Gets the ACL of a file or directory.
`Collection<? extends BlockStoragePolicySpi>`	`getAllStoragePolicies()` Retrieve all the storage policies supported by this file system.
`protected URI`	`getCanonicalUri()` Return a canonicalized form of this FileSystem's URI.
`FileSystem[]`	`getChildFileSystems()` Get all the immediate child FileSystems embedded in this FileSystem.
`Configuration`	`getConf()` Return the configuration used by this object.
`long`	`getDefaultBlockSize()` Return the number of bytes that large input files should be optimally be split into to minimize i/o time.
`long`	`getDefaultBlockSize(Path f)` Return the number of bytes that large input files should be optimally be split into to minimize i/o time.
`short`	`getDefaultReplication()` Get the default replication.
`short`	`getDefaultReplication(Path f)` Get the default replication for a path.
`BlockLocation[]`	`getFileBlockLocations(FileStatus file, long start, long len)` Return an array containing hostnames, offset and size of portions of the given file.
`FileChecksum`	`getFileChecksum(Path f)` Get the checksum of a file.
`FileChecksum`	`getFileChecksum(Path f, long length)` Get the checksum of a file, from the beginning of the file till the specific length.
`FileStatus`	`getFileLinkStatus(Path f)` See `FileContext.getFileLinkStatus(Path)`
`FileStatus`	`getFileStatus(Path f)` Get file status.
`Path`	`getHomeDirectory()` Return the current user's home directory in this filesystem.
`protected Path`	`getInitialWorkingDirectory()` Note: with the new FilesContext class, getWorkingDirectory() will be removed.
`Path`	`getLinkTarget(Path f)` See `FileContext.getLinkTarget(Path)`
`FileSystem`	`getRawFileSystem()` Get the raw file system
`FsServerDefaults`	`getServerDefaults()` Return a set of server default configuration values
`FsServerDefaults`	`getServerDefaults(Path f)` Return a set of server default configuration values
`FsStatus`	`getStatus(Path p)` Returns a status object describing the use and capacity of the file system.
`BlockStoragePolicySpi`	`getStoragePolicy(Path src)` Query the effective storage policy ID for the given file or directory.
`Path`	`getTrashRoot(Path path)` Get the root directory of Trash for current user when the path specified is deleted.
`Collection<FileStatus>`	`getTrashRoots(boolean allUsers)` Get all the trash roots for current user or all users.
`URI`	`getUri()` Returns a URI whose scheme and authority identify this FileSystem.
`long`	`getUsed()` Return the total size of all files in the filesystem.
`long`	`getUsed(Path path)` Return the total size of all files from a specified path.
`Path`	`getWorkingDirectory()` Get the current working directory for the given file system
`byte[]`	`getXAttr(Path path, String name)` Get an xattr name and value for a file or directory.
`Map<String,byte[]>`	`getXAttrs(Path path)` Get all of the xattr name/value pairs for a file or directory.
`Map<String,byte[]>`	`getXAttrs(Path path, List<String> names)` Get all of the xattrs name/value pairs for a file or directory.
`void`	`initialize(URI name, Configuration conf)` Called after a new FileSystem instance is constructed.
`org.apache.hadoop.fs.RemoteIterator<Path>`	`listCorruptFileBlocks(Path path)`
`org.apache.hadoop.fs.RemoteIterator<LocatedFileStatus>`	`listLocatedStatus(Path f)` List files and its block locations in a directory.
`protected org.apache.hadoop.fs.RemoteIterator<LocatedFileStatus>`	`listLocatedStatus(Path f, PathFilter filter)` Listing a directory The returned results include its block location if it is a file The results are filtered by the given path filter
`FileStatus[]`	`listStatus(Path f)` List files in a directory.
`org.apache.hadoop.fs.RemoteIterator<FileStatus>`	`listStatusIterator(Path f)` Return a remote iterator for listing in a directory
`List<String>`	`listXAttrs(Path path)` Get all of the xattr names for a file or directory.
`Path`	`makeQualified(Path path)` Make sure that a path specifies a FileSystem.
`boolean`	`mkdirs(Path f, FsPermission permission)` Make the given file and all non-existent parents into directories.
`void`	`modifyAclEntries(Path path, List<AclEntry> aclSpec)` Modifies ACL entries of files and directories.
`FSDataInputStream`	`open(Path f, int bufferSize)` Opens an FSDataInputStream at the indicated Path.
`protected FSDataOutputStream`	`primitiveCreate(Path f, FsPermission absolutePermission, EnumSet<CreateFlag> flag, int bufferSize, short replication, long blockSize, Progressable progress, org.apache.hadoop.fs.Options.ChecksumOpt checksumOpt)`
`protected boolean`	`primitiveMkdir(Path f, FsPermission abdolutePermission)` This version of the mkdirs method assumes that the permission is absolute.
`void`	`removeAcl(Path path)` Removes all but the base ACL entries of files and directories.
`void`	`removeAclEntries(Path path, List<AclEntry> aclSpec)` Removes ACL entries from files and directories.
`void`	`removeDefaultAcl(Path path)` Removes all default ACL entries from files and directories.
`void`	`removeXAttr(Path path, String name)` Remove an xattr of a file or directory.
`boolean`	`rename(Path src, Path dst)` Renames Path src to Path dst.
`void`	`renameSnapshot(Path path, String snapshotOldName, String snapshotNewName)` Rename a snapshot
`protected Path`	`resolveLink(Path f)` See `AbstractFileSystem.getLinkTarget(Path)`
`Path`	`resolvePath(Path p)` Return the fully-qualified path of path f resolving the path through any symlinks or mount point
`void`	`setAcl(Path path, List<AclEntry> aclSpec)` Fully replaces ACL of files and directories, discarding all existing entries.
`void`	`setOwner(Path p, String username, String groupname)` Set owner of a path (i.e. a file or a directory).
`void`	`setPermission(Path p, FsPermission permission)` Set permission of a path.
`boolean`	`setReplication(Path src, short replication)` Set replication for an existing file.
`void`	`setStoragePolicy(Path src, String policyName)` Set the storage policy for a given file or directory.
`void`	`setTimes(Path p, long mtime, long atime)` Set access time of a file
`void`	`setVerifyChecksum(boolean verifyChecksum)` Set the verify checksum flag.
`void`	`setWorkingDirectory(Path newDir)` Set the current working directory for the given file system.
`void`	`setWriteChecksum(boolean writeChecksum)` Set the write checksum flag.
`void`	`setXAttr(Path path, String name, byte[] value)` Set an xattr of a file or directory.
`void`	`setXAttr(Path path, String name, byte[] value, EnumSet<XAttrSetFlag> flag)` Set an xattr of a file or directory.
`Path`	`startLocalOutput(Path fsOutputFile, Path tmpLocalFile)` Returns a local File that the user can write output to.
`boolean`	`supportsSymlinks()` See `AbstractFileSystem.supportsSymlinks()`
`boolean`	`truncate(Path f, long newLength)` Truncate the file in the indicated path to the indicated size.
`void`	`unsetStoragePolicy(Path src)` Unset the storage policy set for a given file or directory.

クラスから継承されたメソッド org.apache.hadoop.fs.FileSystem
append, append, areSymlinksEnabled, cancelDeleteOnExit, clearStatistics, closeAll, closeAllForUGI, copyFromLocalFile, copyToLocalFile, copyToLocalFile, create, create, create, create, create, create, create, create, create, create, create, createNewFile, createNonRecursive, createNonRecursive, createSnapshot, delete, deleteOnExit, enableSymlinks, exists, fixRelativePart, get, get, get, getAllStatistics, getBlockSize, getContentSummary, getDefaultPort, getDefaultUri, getFileBlockLocations, getFileSystemClass, getFSofPath, getGlobalStorageStatistics, getLength, getLocal, getName, getNamed, getQuotaUsage, getReplication, getScheme, getStatistics, getStatistics, getStatus, getStorageStatistics, globStatus, globStatus, isDirectory, isFile, listFiles, listStatus, listStatus, listStatus, mkdirs, mkdirs, moveFromLocalFile, moveFromLocalFile, moveToLocalFile, newInstance, newInstance, newInstance, newInstanceLocal, open, primitiveMkdir, printStatistics, processDeleteOnExit, rename, setDefaultUri, setDefaultUri

クラスから継承されたメソッド org.apache.hadoop.conf.Configured
setConf

クラスから継承されたメソッド java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- フィールドの詳細
  - fs
```
protected FileSystem fs
```
  - swapScheme
```
protected String swapScheme
```
- コンストラクタの詳細
  - FilterFileSystem
```
public FilterFileSystem()
```
  - FilterFileSystem
```
public FilterFileSystem(FileSystem fs)
```
- メソッドの詳細
  - getRawFileSystem
```
public FileSystem getRawFileSystem()
```
    Get the raw file system
    
    戻り値:
    
    FileSystem being filtered
  - initialize
```
public void initialize(URI name,
                       Configuration conf)
                throws IOException
```
    Called after a new FileSystem instance is constructed.
    
    オーバーライド:
    
    initialize クラス内 FileSystem
    
    パラメータ:
    
    name - a uri whose authority section names the host, port, etc. for this FileSystem
    
    conf - the configuration
    
    例外:
    
    IOException
  - getUri
```
public URI getUri()
```
    Returns a URI whose scheme and authority identify this FileSystem.
    
    定義:
    
    getUri クラス内 FileSystem
  - getCanonicalUri
```
protected URI getCanonicalUri()
```
    クラスからコピーされた説明: FileSystem
    
    Return a canonicalized form of this FileSystem's URI. The default implementation simply calls FileSystem.canonicalizeUri(URI) on the filesystem's own URI, so subclasses typically only need to implement that method.
    
    オーバーライド:
    
    getCanonicalUri クラス内 FileSystem
    
    関連項目:
    
    FileSystem.canonicalizeUri(URI)
  - canonicalizeUri
```
protected URI canonicalizeUri(URI uri)
```
    クラスからコピーされた説明: FileSystem
    
    Canonicalize the given URI. This is filesystem-dependent, but may for example consist of canonicalizing the hostname using DNS and adding the default port if not specified. The default implementation simply fills in the default port if not specified and if the filesystem has a default port.
    
    オーバーライド:
    
    canonicalizeUri クラス内 FileSystem
    
    戻り値:
    
    URI
    
    関連項目:
    
    NetUtils.getCanonicalUri(URI, int)
  - makeQualified
```
public Path makeQualified(Path path)
```
    Make sure that a path specifies a FileSystem.
    
    オーバーライド:
    
    makeQualified クラス内 FileSystem
    
    パラメータ:
    
    path - to use
  - checkPath
```
protected void checkPath(Path path)
```
    Check that a Path belongs to this FileSystem.
    
    オーバーライド:
    
    checkPath クラス内 FileSystem
    
    パラメータ:
    
    path - to check
  - getFileBlockLocations
```
public BlockLocation[] getFileBlockLocations(FileStatus file,
                                             long start,
                                             long len)
                                      throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Return an array containing hostnames, offset and size of portions of the given file. For a nonexistent file or regions, null will be returned. This call is most helpful with DFS, where it returns hostnames of machines that contain the given file. The FileSystem will simply return an elt containing 'localhost'.
    
    オーバーライド:
    
    getFileBlockLocations クラス内 FileSystem
    
    パラメータ:
    
    file - FilesStatus to get data from
    
    start - offset into the given file
    
    len - length for which to get locations for
    
    例外:
    
    IOException
  - resolvePath
```
public Path resolvePath(Path p)
                 throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Return the fully-qualified path of path f resolving the path through any symlinks or mount point
    
    オーバーライド:
    
    resolvePath クラス内 FileSystem
    
    パラメータ:
    
    p - path to be resolved
    
    戻り値:
    
    fully qualified path
    
    例外:
    
    FileNotFoundException
    
    IOException
  - open
```
public FSDataInputStream open(Path f,
                              int bufferSize)
                       throws IOException
```
    Opens an FSDataInputStream at the indicated Path.
    
    定義:
    
    open クラス内 FileSystem
    
    パラメータ:
    
    f - the file name to open
    
    bufferSize - the size of the buffer to be used.
    
    例外:
    
    IOException
  - append
```
public FSDataOutputStream append(Path f,
                                 int bufferSize,
                                 Progressable progress)
                          throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Append to an existing file (optional operation).
    
    定義:
    
    append クラス内 FileSystem
    
    パラメータ:
    
    f - the existing file to be appended.
    
    bufferSize - the size of the buffer to be used.
    
    progress - for reporting progress if it is not null.
    
    例外:
    
    IOException
  - concat
```
public void concat(Path f,
                   Path[] psrcs)
            throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Concat existing files together.
    
    オーバーライド:
    
    concat クラス内 FileSystem
    
    パラメータ:
    
    f - the path to the target destination.
    
    psrcs - the paths to the sources to use for the concatenation.
    
    例外:
    
    IOException
  - create
```
public FSDataOutputStream create(Path f,
                                 FsPermission permission,
                                 boolean overwrite,
                                 int bufferSize,
                                 short replication,
                                 long blockSize,
                                 Progressable progress)
                          throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Create an FSDataOutputStream at the indicated Path with write-progress reporting.
    
    定義:
    
    create クラス内 FileSystem
    
    パラメータ:
    
    f - the file name to open
    
    permission - file permission
    
    overwrite - if a file with this name already exists, then if true, the file will be overwritten, and if false an error will be thrown.
    
    bufferSize - the size of the buffer to be used.
    
    replication - required block replication for the file.
    
    blockSize - block size
    
    progress - the progress reporter
    
    例外:
    
    IOException
    
    関連項目:
    
    FileSystem.setPermission(Path, FsPermission)
  - create
```
public FSDataOutputStream create(Path f,
                                 FsPermission permission,
                                 EnumSet<CreateFlag> flags,
                                 int bufferSize,
                                 short replication,
                                 long blockSize,
                                 Progressable progress,
                                 org.apache.hadoop.fs.Options.ChecksumOpt checksumOpt)
                          throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Create an FSDataOutputStream at the indicated Path with a custom checksum option
    
    オーバーライド:
    
    create クラス内 FileSystem
    
    パラメータ:
    
    f - the file name to open
    
    permission - file permission
    
    flags - CreateFlags to use for this stream.
    
    bufferSize - the size of the buffer to be used.
    
    replication - required block replication for the file.
    
    blockSize - block size
    
    progress - the progress reporter
    
    checksumOpt - checksum parameter. If null, the values found in conf will be used.
    
    例外:
    
    IOException
    
    関連項目:
    
    FileSystem.setPermission(Path, FsPermission)
  - listLocatedStatus
```
protected org.apache.hadoop.fs.RemoteIterator<LocatedFileStatus> listLocatedStatus(Path f,
                                                                                   PathFilter filter)
                                                                            throws FileNotFoundException,
                                                                                   IOException
```
    クラスからコピーされた説明: FileSystem
    
    Listing a directory The returned results include its block location if it is a file The results are filtered by the given path filter
    
    オーバーライド:
    
    listLocatedStatus クラス内 FileSystem
    
    パラメータ:
    
    f - a path
    
    filter - a path filter
    
    戻り値:
    
    an iterator that traverses statuses of the files/directories in the given path
    
    例外:
    
    FileNotFoundException - if f does not exist
    
    IOException - if any I/O error occurred
  - createNonRecursive
```
public FSDataOutputStream createNonRecursive(Path f,
                                             FsPermission permission,
                                             EnumSet<CreateFlag> flags,
                                             int bufferSize,
                                             short replication,
                                             long blockSize,
                                             Progressable progress)
                                      throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Opens an FSDataOutputStream at the indicated Path with write-progress reporting. Same as create(), except fails if parent directory doesn't already exist.
    
    オーバーライド:
    
    createNonRecursive クラス内 FileSystem
    
    パラメータ:
    
    f - the file name to open
    
    permission - file permission
    
    flags - CreateFlags to use for this stream.
    
    bufferSize - the size of the buffer to be used.
    
    replication - required block replication for the file.
    
    blockSize - block size
    
    progress - the progress reporter
    
    例外:
    
    IOException
    
    関連項目:
    
    FileSystem.setPermission(Path, FsPermission)
  - setReplication
```
public boolean setReplication(Path src,
                              short replication)
                       throws IOException
```
    Set replication for an existing file.
    
    オーバーライド:
    
    setReplication クラス内 FileSystem
    
    パラメータ:
    
    src - file name
    
    replication - new replication
    
    戻り値:
    
    true if successful; false if file does not exist or is a directory
    
    例外:
    
    IOException
  - rename
```
public boolean rename(Path src,
                      Path dst)
               throws IOException
```
    Renames Path src to Path dst. Can take place on local fs or remote DFS.
    
    定義:
    
    rename クラス内 FileSystem
    
    パラメータ:
    
    src - path to be renamed
    
    dst - new path after rename
    
    戻り値:
    
    true if rename is successful
    
    例外:
    
    IOException - on failure
  - truncate
```
public boolean truncate(Path f,
                        long newLength)
                 throws IOException
```
    クラスからコピーされた説明: FileSystem
    Truncate the file in the indicated path to the indicated size.
    - Fails if path is a directory.
    - Fails if path does not exist.
    - Fails if path is not closed.
    - Fails if new size is greater than current size.
    オーバーライド:
    
    truncate クラス内 FileSystem
    
    パラメータ:
    
    f - The path to the file to be truncated
    
    newLength - The size the file is to be truncated to
    
    戻り値:
    
    true if the file has been truncated to the desired newLength and is immediately available to be reused for write operations such as append, or false if a background process of adjusting the length of the last block has been started, and clients should wait for it to complete before proceeding with further file updates.
    
    例外:
    
    IOException
  - delete
```
public boolean delete(Path f,
                      boolean recursive)
               throws IOException
```
    Delete a file
    
    定義:
    
    delete クラス内 FileSystem
    
    パラメータ:
    
    f - the path to delete.
    
    recursive - if path is a directory and set to true, the directory is deleted else throws an exception. In case of a file the recursive can be set to either true or false.
    
    戻り値:
    
    true if delete is successful else false.
    
    例外:
    
    IOException
  - listStatus
```
public FileStatus[] listStatus(Path f)
                        throws IOException
```
    List files in a directory.
    
    定義:
    
    listStatus クラス内 FileSystem
    
    パラメータ:
    
    f - given path
    
    戻り値:
    
    the statuses of the files/directories in the given patch
    
    例外:
    
    FileNotFoundException - when the path does not exist; IOException see specific implementation
    
    IOException
  - listCorruptFileBlocks
```
public org.apache.hadoop.fs.RemoteIterator<Path> listCorruptFileBlocks(Path path)
                                                                throws IOException
```
    オーバーライド:
    
    listCorruptFileBlocks クラス内 FileSystem
    
    戻り値:
    
    an iterator over the corrupt files under the given path (may contain duplicates if a file has more than one corrupt block)
    
    例外:
    
    IOException
  - listLocatedStatus
```
public org.apache.hadoop.fs.RemoteIterator<LocatedFileStatus> listLocatedStatus(Path f)
                                                                         throws IOException
```
    List files and its block locations in a directory.
    
    オーバーライド:
    
    listLocatedStatus クラス内 FileSystem
    
    パラメータ:
    
    f - is the path
    
    戻り値:
    
    an iterator that traverses statuses of the files/directories in the given path
    
    例外:
    
    FileNotFoundException - If f does not exist
    
    IOException - If an I/O error occurred
  - listStatusIterator
```
public org.apache.hadoop.fs.RemoteIterator<FileStatus> listStatusIterator(Path f)
                                                                   throws IOException
```
    Return a remote iterator for listing in a directory
    
    オーバーライド:
    
    listStatusIterator クラス内 FileSystem
    
    パラメータ:
    
    f - target path
    
    戻り値:
    
    remote iterator
    
    例外:
    
    IOException
  - getHomeDirectory
```
public Path getHomeDirectory()
```
    クラスからコピーされた説明: FileSystem
    
    Return the current user's home directory in this filesystem. The default implementation returns "/user/$USER/".
    
    オーバーライド:
    
    getHomeDirectory クラス内 FileSystem
  - setWorkingDirectory
```
public void setWorkingDirectory(Path newDir)
```
    Set the current working directory for the given file system. All relative paths will be resolved relative to it.
    
    定義:
    
    setWorkingDirectory クラス内 FileSystem
    
    パラメータ:
    
    newDir -
  - getWorkingDirectory
```
public Path getWorkingDirectory()
```
    Get the current working directory for the given file system
    
    定義:
    
    getWorkingDirectory クラス内 FileSystem
    
    戻り値:
    
    the directory pathname
  - getInitialWorkingDirectory
```
protected Path getInitialWorkingDirectory()
```
    クラスからコピーされた説明: FileSystem
    
    Note: with the new FilesContext class, getWorkingDirectory() will be removed. The working directory is implemented in FilesContext. Some file systems like LocalFileSystem have an initial workingDir that we use as the starting workingDir. For other file systems like HDFS there is no built in notion of an initial workingDir.
    
    オーバーライド:
    
    getInitialWorkingDirectory クラス内 FileSystem
    
    戻り値:
    
    if there is built in notion of workingDir then it is returned; else a null is returned.
  - getStatus
```
public FsStatus getStatus(Path p)
                   throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Returns a status object describing the use and capacity of the file system. If the file system has multiple partitions, the use and capacity of the partition pointed to by the specified path is reflected.
    
    オーバーライド:
    
    getStatus クラス内 FileSystem
    
    パラメータ:
    
    p - Path for which status should be obtained. null means the default partition.
    
    戻り値:
    
    a FsStatus object
    
    例外:
    
    IOException - see specific implementation
  - mkdirs
```
public boolean mkdirs(Path f,
                      FsPermission permission)
               throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Make the given file and all non-existent parents into directories. Has the semantics of Unix 'mkdir -p'. Existence of the directory hierarchy is not an error.
    
    定義:
    
    mkdirs クラス内 FileSystem
    
    パラメータ:
    
    f - path to create
    
    permission - to apply to f
    
    例外:
    
    IOException
  - copyFromLocalFile
```
public void copyFromLocalFile(boolean delSrc,
                              Path src,
                              Path dst)
                       throws IOException
```
    The src file is on the local disk. Add it to FS at the given dst name. delSrc indicates if the source should be removed
    
    オーバーライド:
    
    copyFromLocalFile クラス内 FileSystem
    
    パラメータ:
    
    delSrc - whether to delete the src
    
    src - path
    
    dst - path
    
    例外:
    
    IOException
  - copyFromLocalFile
```
public void copyFromLocalFile(boolean delSrc,
                              boolean overwrite,
                              Path[] srcs,
                              Path dst)
                       throws IOException
```
    The src files are on the local disk. Add it to FS at the given dst name. delSrc indicates if the source should be removed
    
    オーバーライド:
    
    copyFromLocalFile クラス内 FileSystem
    
    パラメータ:
    
    delSrc - whether to delete the src
    
    overwrite - whether to overwrite an existing file
    
    srcs - array of paths which are source
    
    dst - path
    
    例外:
    
    IOException
  - copyFromLocalFile
```
public void copyFromLocalFile(boolean delSrc,
                              boolean overwrite,
                              Path src,
                              Path dst)
                       throws IOException
```
    The src file is on the local disk. Add it to FS at the given dst name. delSrc indicates if the source should be removed
    
    オーバーライド:
    
    copyFromLocalFile クラス内 FileSystem
    
    パラメータ:
    
    delSrc - whether to delete the src
    
    overwrite - whether to overwrite an existing file
    
    src - path
    
    dst - path
    
    例外:
    
    IOException
  - copyToLocalFile
```
public void copyToLocalFile(boolean delSrc,
                            Path src,
                            Path dst)
                     throws IOException
```
    The src file is under FS, and the dst is on the local disk. Copy it from FS control to the local dst name. delSrc indicates if the src will be removed or not.
    
    オーバーライド:
    
    copyToLocalFile クラス内 FileSystem
    
    パラメータ:
    
    delSrc - whether to delete the src
    
    src - path
    
    dst - path
    
    例外:
    
    IOException
  - startLocalOutput
```
public Path startLocalOutput(Path fsOutputFile,
                             Path tmpLocalFile)
                      throws IOException
```
    Returns a local File that the user can write output to. The caller provides both the eventual FS target name and the local working file. If the FS is local, we write directly into the target. If the FS is remote, we write into the tmp local area.
    
    オーバーライド:
    
    startLocalOutput クラス内 FileSystem
    
    パラメータ:
    
    fsOutputFile - path of output file
    
    tmpLocalFile - path of local tmp file
    
    例外:
    
    IOException
  - completeLocalOutput
```
public void completeLocalOutput(Path fsOutputFile,
                                Path tmpLocalFile)
                         throws IOException
```
    Called when we're all done writing to the target. A local FS will do nothing, because we've written to exactly the right place. A remote FS will copy the contents of tmpLocalFile to the correct target at fsOutputFile.
    
    オーバーライド:
    
    completeLocalOutput クラス内 FileSystem
    
    パラメータ:
    
    fsOutputFile - path of output file
    
    tmpLocalFile - path to local tmp file
    
    例外:
    
    IOException
  - getUsed
```
public long getUsed()
             throws IOException
```
    Return the total size of all files in the filesystem.
    
    オーバーライド:
    
    getUsed クラス内 FileSystem
    
    例外:
    
    IOException
  - getUsed
```
public long getUsed(Path path)
             throws IOException
```
    Return the total size of all files from a specified path.
    
    オーバーライド:
    
    getUsed クラス内 FileSystem
    
    例外:
    
    IOException
  - getDefaultBlockSize
```
public long getDefaultBlockSize()
```
    クラスからコピーされた説明: FileSystem
    
    Return the number of bytes that large input files should be optimally be split into to minimize i/o time.
    
    オーバーライド:
    
    getDefaultBlockSize クラス内 FileSystem
  - getDefaultReplication
```
public short getDefaultReplication()
```
    クラスからコピーされた説明: FileSystem
    
    Get the default replication.
    
    オーバーライド:
    
    getDefaultReplication クラス内 FileSystem
  - getServerDefaults
```
public FsServerDefaults getServerDefaults()
                                   throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Return a set of server default configuration values
    
    オーバーライド:
    
    getServerDefaults クラス内 FileSystem
    
    戻り値:
    
    server default configuration values
    
    例外:
    
    IOException
  - getDefaultBlockSize
```
public long getDefaultBlockSize(Path f)
```
    クラスからコピーされた説明: FileSystem
    
    Return the number of bytes that large input files should be optimally be split into to minimize i/o time. The given path will be used to locate the actual filesystem. The full path does not have to exist.
    
    オーバーライド:
    
    getDefaultBlockSize クラス内 FileSystem
    
    パラメータ:
    
    f - path of file
    
    戻り値:
    
    the default block size for the path's filesystem
  - getDefaultReplication
```
public short getDefaultReplication(Path f)
```
    クラスからコピーされた説明: FileSystem
    
    Get the default replication for a path. The given path will be used to locate the actual filesystem. The full path does not have to exist.
    
    オーバーライド:
    
    getDefaultReplication クラス内 FileSystem
    
    パラメータ:
    
    f - of the file
    
    戻り値:
    
    default replication for the path's filesystem
  - getServerDefaults
```
public FsServerDefaults getServerDefaults(Path f)
                                   throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Return a set of server default configuration values
    
    オーバーライド:
    
    getServerDefaults クラス内 FileSystem
    
    パラメータ:
    
    f - path is used to identify an FS since an FS could have another FS that it could be delegating the call to
    
    戻り値:
    
    server default configuration values
    
    例外:
    
    IOException
  - getFileStatus
```
public FileStatus getFileStatus(Path f)
                         throws IOException
```
    Get file status.
    
    定義:
    
    getFileStatus クラス内 FileSystem
    
    パラメータ:
    
    f - The path we want information from
    
    戻り値:
    
    a FileStatus object
    
    例外:
    
    FileNotFoundException - when the path does not exist; IOException see specific implementation
    
    IOException
  - access
```
public void access(Path path,
                   FsAction mode)
            throws org.apache.hadoop.security.AccessControlException,
                   FileNotFoundException,
                   IOException
```
    クラスからコピーされた説明: FileSystem
    
    Checks if the user can access a path. The mode specifies which access checks to perform. If the requested permissions are granted, then the method returns normally. If access is denied, then the method throws an AccessControlException.
    The default implementation of this method calls FileSystem.getFileStatus(Path) and checks the returned permissions against the requested permissions. Note that the getFileStatus call will be subject to authorization checks. Typically, this requires search (execute) permissions on each directory in the path's prefix, but this is implementation-defined. Any file system that provides a richer authorization model (such as ACLs) may override the default implementation so that it checks against that model instead.
    In general, applications should avoid using this method, due to the risk of time-of-check/time-of-use race conditions. The permissions on a file may change immediately after the access call returns. Most applications should prefer running specific file system actions as the desired user represented by a UserGroupInformation.
    
    パラメータ:
    
    path - Path to check
    
    mode - type of access to check
    
    例外:
    
    org.apache.hadoop.security.AccessControlException - if access is denied
    
    FileNotFoundException - if the path does not exist
    
    IOException - see specific implementation
  - createSymlink
```
public void createSymlink(Path target,
                          Path link,
                          boolean createParent)
                   throws org.apache.hadoop.security.AccessControlException,
                          FileAlreadyExistsException,
                          FileNotFoundException,
                          ParentNotDirectoryException,
                          UnsupportedFileSystemException,
                          IOException
```
    クラスからコピーされた説明: FileSystem
    
    See FileContext.createSymlink(Path, Path, boolean)
    
    オーバーライド:
    
    createSymlink クラス内 FileSystem
    
    例外:
    
    org.apache.hadoop.security.AccessControlException
    
    FileAlreadyExistsException
    
    FileNotFoundException
    
    ParentNotDirectoryException
    
    UnsupportedFileSystemException
    
    IOException
  - getFileLinkStatus
```
public FileStatus getFileLinkStatus(Path f)
                             throws org.apache.hadoop.security.AccessControlException,
                                    FileNotFoundException,
                                    UnsupportedFileSystemException,
                                    IOException
```
    クラスからコピーされた説明: FileSystem
    
    See FileContext.getFileLinkStatus(Path)
    
    オーバーライド:
    
    getFileLinkStatus クラス内 FileSystem
    
    例外:
    
    org.apache.hadoop.security.AccessControlException
    
    FileNotFoundException
    
    UnsupportedFileSystemException
    
    IOException
  - supportsSymlinks
```
public boolean supportsSymlinks()
```
    クラスからコピーされた説明: FileSystem
    
    See AbstractFileSystem.supportsSymlinks()
    
    オーバーライド:
    
    supportsSymlinks クラス内 FileSystem
  - getLinkTarget
```
public Path getLinkTarget(Path f)
                   throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    See FileContext.getLinkTarget(Path)
    
    オーバーライド:
    
    getLinkTarget クラス内 FileSystem
    
    例外:
    
    IOException
  - resolveLink
```
protected Path resolveLink(Path f)
                    throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    See AbstractFileSystem.getLinkTarget(Path)
    
    オーバーライド:
    
    resolveLink クラス内 FileSystem
    
    例外:
    
    IOException
  - getFileChecksum
```
public FileChecksum getFileChecksum(Path f)
                             throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Get the checksum of a file.
    
    オーバーライド:
    
    getFileChecksum クラス内 FileSystem
    
    パラメータ:
    
    f - The file path
    
    戻り値:
    
    The file checksum. The default return value is null, which indicates that no checksum algorithm is implemented in the corresponding FileSystem.
    
    例外:
    
    IOException
  - getFileChecksum
```
public FileChecksum getFileChecksum(Path f,
                                    long length)
                             throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Get the checksum of a file, from the beginning of the file till the specific length.
    
    オーバーライド:
    
    getFileChecksum クラス内 FileSystem
    
    パラメータ:
    
    f - The file path
    
    length - The length of the file range for checksum calculation
    
    戻り値:
    
    The file checksum.
    
    例外:
    
    IOException
  - setVerifyChecksum
```
public void setVerifyChecksum(boolean verifyChecksum)
```
    クラスからコピーされた説明: FileSystem
    
    Set the verify checksum flag. This is only applicable if the corresponding FileSystem supports checksum. By default doesn't do anything.
    
    オーバーライド:
    
    setVerifyChecksum クラス内 FileSystem
    
    パラメータ:
    
    verifyChecksum - Verify checksum flag
  - setWriteChecksum
```
public void setWriteChecksum(boolean writeChecksum)
```
    クラスからコピーされた説明: FileSystem
    
    Set the write checksum flag. This is only applicable if the corresponding FileSystem supports checksum. By default doesn't do anything.
    
    オーバーライド:
    
    setWriteChecksum クラス内 FileSystem
    
    パラメータ:
    
    writeChecksum - Write checsum flag
  - getConf
```
public Configuration getConf()
```
    インタフェースからコピーされた説明: Configurable
    
    Return the configuration used by this object.
    
    定義:
    
    getConf インタフェース内 Configurable
    
    オーバーライド:
    
    getConf クラス内 Configured
  - close
```
public void close()
           throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    No more filesystem operations are needed. Will release any held locks.
    
    定義:
    
    close インタフェース内 Closeable
    
    定義:
    
    close インタフェース内 AutoCloseable
    
    オーバーライド:
    
    close クラス内 FileSystem
    
    例外:
    
    IOException
  - setOwner
```
public void setOwner(Path p,
                     String username,
                     String groupname)
              throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Set owner of a path (i.e. a file or a directory). The parameters username and groupname cannot both be null.
    
    オーバーライド:
    
    setOwner クラス内 FileSystem
    
    パラメータ:
    
    p - The path
    
    username - If it is null, the original username remains unchanged.
    
    groupname - If it is null, the original groupname remains unchanged.
    
    例外:
    
    IOException
  - setTimes
```
public void setTimes(Path p,
                     long mtime,
                     long atime)
              throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Set access time of a file
    
    オーバーライド:
    
    setTimes クラス内 FileSystem
    
    パラメータ:
    
    p - The path
    
    mtime - Set the modification time of this file. The number of milliseconds since Jan 1, 1970. A value of -1 means that this call should not set modification time.
    
    atime - Set the access time of this file. The number of milliseconds since Jan 1, 1970. A value of -1 means that this call should not set access time.
    
    例外:
    
    IOException
  - setPermission
```
public void setPermission(Path p,
                          FsPermission permission)
                   throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Set permission of a path.
    
    オーバーライド:
    
    setPermission クラス内 FileSystem
    
    パラメータ:
    
    p - The path
    
    permission - permission
    
    例外:
    
    IOException
  - primitiveCreate
```
protected FSDataOutputStream primitiveCreate(Path f,
                                             FsPermission absolutePermission,
                                             EnumSet<CreateFlag> flag,
                                             int bufferSize,
                                             short replication,
                                             long blockSize,
                                             Progressable progress,
                                             org.apache.hadoop.fs.Options.ChecksumOpt checksumOpt)
                                      throws IOException
```
    オーバーライド:
    
    primitiveCreate クラス内 FileSystem
    
    例外:
    
    IOException
  - primitiveMkdir
```
protected boolean primitiveMkdir(Path f,
                                 FsPermission abdolutePermission)
                          throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    This version of the mkdirs method assumes that the permission is absolute. It has been added to support the FileContext that processes the permission with umask before calling this method. This a temporary method added to support the transition from FileSystem to FileContext for user applications.
    
    オーバーライド:
    
    primitiveMkdir クラス内 FileSystem
    
    例外:
    
    IOException
  - getChildFileSystems
```
public FileSystem[] getChildFileSystems()
```
    クラスからコピーされた説明: FileSystem
    
    Get all the immediate child FileSystems embedded in this FileSystem. It does not recurse and get grand children. If a FileSystem has multiple child FileSystems, then it should return a unique list of those FileSystems. Default is to return null to signify no children.
    
    戻り値:
    
    FileSystems used by this FileSystem
  - createSnapshot
```
public Path createSnapshot(Path path,
                           String snapshotName)
                    throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Create a snapshot
    
    オーバーライド:
    
    createSnapshot クラス内 FileSystem
    
    パラメータ:
    
    path - The directory where snapshots will be taken.
    
    snapshotName - The name of the snapshot
    
    戻り値:
    
    the snapshot path.
    
    例外:
    
    IOException
  - renameSnapshot
```
public void renameSnapshot(Path path,
                           String snapshotOldName,
                           String snapshotNewName)
                    throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Rename a snapshot
    
    オーバーライド:
    
    renameSnapshot クラス内 FileSystem
    
    パラメータ:
    
    path - The directory path where the snapshot was taken
    
    snapshotOldName - Old name of the snapshot
    
    snapshotNewName - New name of the snapshot
    
    例外:
    
    IOException
  - deleteSnapshot
```
public void deleteSnapshot(Path path,
                           String snapshotName)
                    throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Delete a snapshot of a directory
    
    オーバーライド:
    
    deleteSnapshot クラス内 FileSystem
    
    パラメータ:
    
    path - The directory that the to-be-deleted snapshot belongs to
    
    snapshotName - The name of the snapshot
    
    例外:
    
    IOException
  - modifyAclEntries
```
public void modifyAclEntries(Path path,
                             List<AclEntry> aclSpec)
                      throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Modifies ACL entries of files and directories. This method can add new ACL entries or modify the permissions on existing ACL entries. All existing ACL entries that are not specified in this call are retained without changes. (Modifications are merged into the current ACL.)
    
    オーバーライド:
    
    modifyAclEntries クラス内 FileSystem
    
    パラメータ:
    
    path - Path to modify
    
    aclSpec - List describing modifications
    
    例外:
    
    IOException - if an ACL could not be modified
  - removeAclEntries
```
public void removeAclEntries(Path path,
                             List<AclEntry> aclSpec)
                      throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Removes ACL entries from files and directories. Other ACL entries are retained.
    
    オーバーライド:
    
    removeAclEntries クラス内 FileSystem
    
    パラメータ:
    
    path - Path to modify
    
    aclSpec - List describing entries to remove
    
    例外:
    
    IOException - if an ACL could not be modified
  - removeDefaultAcl
```
public void removeDefaultAcl(Path path)
                      throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Removes all default ACL entries from files and directories.
    
    オーバーライド:
    
    removeDefaultAcl クラス内 FileSystem
    
    パラメータ:
    
    path - Path to modify
    
    例外:
    
    IOException - if an ACL could not be modified
  - removeAcl
```
public void removeAcl(Path path)
               throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Removes all but the base ACL entries of files and directories. The entries for user, group, and others are retained for compatibility with permission bits.
    
    オーバーライド:
    
    removeAcl クラス内 FileSystem
    
    パラメータ:
    
    path - Path to modify
    
    例外:
    
    IOException - if an ACL could not be removed
  - setAcl
```
public void setAcl(Path path,
                   List<AclEntry> aclSpec)
            throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Fully replaces ACL of files and directories, discarding all existing entries.
    
    オーバーライド:
    
    setAcl クラス内 FileSystem
    
    パラメータ:
    
    path - Path to modify
    
    aclSpec - List describing modifications, must include entries for user, group, and others for compatibility with permission bits.
    
    例外:
    
    IOException - if an ACL could not be modified
  - getAclStatus
```
public AclStatus getAclStatus(Path path)
                       throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Gets the ACL of a file or directory.
    
    オーバーライド:
    
    getAclStatus クラス内 FileSystem
    
    パラメータ:
    
    path - Path to get
    
    戻り値:
    
    AclStatus describing the ACL of the file or directory
    
    例外:
    
    IOException - if an ACL could not be read
  - setXAttr
```
public void setXAttr(Path path,
                     String name,
                     byte[] value)
              throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Set an xattr of a file or directory. The name must be prefixed with the namespace followed by ".". For example, "user.attr".
    Refer to the HDFS extended attributes user documentation for details.
    
    オーバーライド:
    
    setXAttr クラス内 FileSystem
    
    パラメータ:
    
    path - Path to modify
    
    name - xattr name.
    
    value - xattr value.
    
    例外:
    
    IOException
  - setXAttr
```
public void setXAttr(Path path,
                     String name,
                     byte[] value,
                     EnumSet<XAttrSetFlag> flag)
              throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Set an xattr of a file or directory. The name must be prefixed with the namespace followed by ".". For example, "user.attr".
    Refer to the HDFS extended attributes user documentation for details.
    
    オーバーライド:
    
    setXAttr クラス内 FileSystem
    
    パラメータ:
    
    path - Path to modify
    
    name - xattr name.
    
    value - xattr value.
    
    flag - xattr set flag
    
    例外:
    
    IOException
  - getXAttr
```
public byte[] getXAttr(Path path,
                       String name)
                throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Get an xattr name and value for a file or directory. The name must be prefixed with the namespace followed by ".". For example, "user.attr".
    Refer to the HDFS extended attributes user documentation for details.
    
    オーバーライド:
    
    getXAttr クラス内 FileSystem
    
    パラメータ:
    
    path - Path to get extended attribute
    
    name - xattr name.
    
    戻り値:
    
    byte[] xattr value.
    
    例外:
    
    IOException
  - getXAttrs
```
public Map<String,byte[]> getXAttrs(Path path)
                             throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Get all of the xattr name/value pairs for a file or directory. Only those xattrs which the logged-in user has permissions to view are returned.
    Refer to the HDFS extended attributes user documentation for details.
    
    オーバーライド:
    
    getXAttrs クラス内 FileSystem
    
    パラメータ:
    
    path - Path to get extended attributes
    
    戻り値:
    
    Map describing the XAttrs of the file or directory
    
    例外:
    
    IOException
  - getXAttrs
```
public Map<String,byte[]> getXAttrs(Path path,
                                    List<String> names)
                             throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Get all of the xattrs name/value pairs for a file or directory. Only those xattrs which the logged-in user has permissions to view are returned.
    Refer to the HDFS extended attributes user documentation for details.
    
    オーバーライド:
    
    getXAttrs クラス内 FileSystem
    
    パラメータ:
    
    path - Path to get extended attributes
    
    names - XAttr names.
    
    戻り値:
    
    Map describing the XAttrs of the file or directory
    
    例外:
    
    IOException
  - listXAttrs
```
public List<String> listXAttrs(Path path)
                        throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Get all of the xattr names for a file or directory. Only those xattr names which the logged-in user has permissions to view are returned.
    Refer to the HDFS extended attributes user documentation for details.
    
    オーバーライド:
    
    listXAttrs クラス内 FileSystem
    
    パラメータ:
    
    path - Path to get extended attributes
    
    戻り値:
    
    List of the XAttr names of the file or directory
    
    例外:
    
    IOException
  - removeXAttr
```
public void removeXAttr(Path path,
                        String name)
                 throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Remove an xattr of a file or directory. The name must be prefixed with the namespace followed by ".". For example, "user.attr".
    Refer to the HDFS extended attributes user documentation for details.
    
    オーバーライド:
    
    removeXAttr クラス内 FileSystem
    
    パラメータ:
    
    path - Path to remove extended attribute
    
    name - xattr name
    
    例外:
    
    IOException
  - setStoragePolicy
```
public void setStoragePolicy(Path src,
                             String policyName)
                      throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Set the storage policy for a given file or directory.
    
    オーバーライド:
    
    setStoragePolicy クラス内 FileSystem
    
    パラメータ:
    
    src - file or directory path.
    
    policyName - the name of the target storage policy. The list of supported Storage policies can be retrieved via FileSystem.getAllStoragePolicies().
    
    例外:
    
    IOException
  - unsetStoragePolicy
```
public void unsetStoragePolicy(Path src)
                        throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Unset the storage policy set for a given file or directory.
    
    オーバーライド:
    
    unsetStoragePolicy クラス内 FileSystem
    
    パラメータ:
    
    src - file or directory path.
    
    例外:
    
    IOException
  - getStoragePolicy
```
public BlockStoragePolicySpi getStoragePolicy(Path src)
                                       throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Query the effective storage policy ID for the given file or directory.
    
    オーバーライド:
    
    getStoragePolicy クラス内 FileSystem
    
    パラメータ:
    
    src - file or directory path.
    
    戻り値:
    
    storage policy for give file.
    
    例外:
    
    IOException
  - getAllStoragePolicies
```
public Collection<? extends BlockStoragePolicySpi> getAllStoragePolicies()
                                                                  throws IOException
```
    クラスからコピーされた説明: FileSystem
    
    Retrieve all the storage policies supported by this file system.
    
    オーバーライド:
    
    getAllStoragePolicies クラス内 FileSystem
    
    戻り値:
    
    all storage policies supported by this filesystem.
    
    例外:
    
    IOException
  - getTrashRoot
```
public Path getTrashRoot(Path path)
```
    クラスからコピーされた説明: FileSystem
    
    Get the root directory of Trash for current user when the path specified is deleted.
    
    オーバーライド:
    
    getTrashRoot クラス内 FileSystem
    
    パラメータ:
    
    path - the trash root of the path to be determined.
    
    戻り値:
    
    the default implementation returns "/user/$USER/.Trash".
  - getTrashRoots
```
public Collection<FileStatus> getTrashRoots(boolean allUsers)
```
    クラスからコピーされた説明: FileSystem
    
    Get all the trash roots for current user or all users.
    
    オーバーライド:
    
    getTrashRoots クラス内 FileSystem
    
    パラメータ:
    
    allUsers - return trash roots for all users if true.
    
    戻り値:
    
    all the trash root directories. Default FileSystem returns .Trash under users' home directories if /user/$USER/.Trash exists.

クラス FilterFileSystem

フィールドのサマリー

クラスから継承されたフィールド org.apache.hadoop.fs.FileSystem

コンストラクタのサマリー

メソッドのサマリー

クラスから継承されたメソッド org.apache.hadoop.fs.FileSystem

クラスから継承されたメソッド org.apache.hadoop.conf.Configured

クラスから継承されたメソッド java.lang.Object

フィールドの詳細

fs

swapScheme

コンストラクタの詳細

FilterFileSystem

FilterFileSystem

メソッドの詳細

getRawFileSystem

initialize

getUri

getCanonicalUri

canonicalizeUri

makeQualified

checkPath

getFileBlockLocations

resolvePath

open

append

concat

create

create

listLocatedStatus

createNonRecursive

setReplication

rename

truncate

delete

listStatus

listCorruptFileBlocks

listLocatedStatus

listStatusIterator

getHomeDirectory

setWorkingDirectory

getWorkingDirectory

getInitialWorkingDirectory

getStatus

mkdirs

copyFromLocalFile

copyFromLocalFile

copyFromLocalFile

copyToLocalFile

startLocalOutput

completeLocalOutput

getUsed

getUsed

getDefaultBlockSize

getDefaultReplication

getServerDefaults

getDefaultBlockSize

getDefaultReplication

getServerDefaults

getFileStatus

access

createSymlink

getFileLinkStatus

supportsSymlinks

getLinkTarget

resolveLink

getFileChecksum

getFileChecksum

setVerifyChecksum

setWriteChecksum

getConf

close

setOwner

setTimes

setPermission

primitiveCreate

primitiveMkdir

getChildFileSystems

createSnapshot

renameSnapshot