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

java.lang.Object
- org.apache.hadoop.fs.Path

すべての実装されたインタフェース:

ObjectInputValidation, Serializable, Comparable
```
@Stringable
 @InterfaceAudience.Public
 @InterfaceStability.Stable
public class Path
extends Object
implements Comparable, Serializable, ObjectInputValidation
```
Names a file or directory in a FileSystem. Path strings use slash as the directory separator.

関連項目:

直列化された形式

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
`static String`	`CUR_DIR` The current directory, ".".
`static String`	`SEPARATOR` The directory separator, a slash.
`static char`	`SEPARATOR_CHAR` The directory separator, a slash, as a character.
`static boolean`	`WINDOWS` Whether the current host is a Windows machine.

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
`Path(Path parent, Path child)` Create a new Path based on the child path resolved against the parent path.
`Path(Path parent, String child)` Create a new Path based on the child path resolved against the parent path.
`Path(String pathString)` Construct a path from a String.
`Path(String parent, Path child)` Create a new Path based on the child path resolved against the parent path.
`Path(String parent, String child)` Create a new Path based on the child path resolved against the parent path.
`Path(String scheme, String authority, String path)` Construct a Path from components.
`Path(URI aUri)` Construct a path from a URI

メソッドのサマリー

すべてのメソッド staticメソッドインスタンス・メソッド concreteメソッド非推奨のメソッド
修飾子とタイプ	メソッドと説明
`int`	`compareTo(Object o)`
`int`	`depth()` Returns the number of elements in this path.
`boolean`	`equals(Object o)`
`FileSystem`	`getFileSystem(Configuration conf)` Return the FileSystem that owns this Path.
`String`	`getName()` Returns the final component of this path.
`Path`	`getParent()` Returns the parent of a path or null if at root.
`static Path`	`getPathWithoutSchemeAndAuthority(Path path)` Return a version of the given Path without the scheme information.
`int`	`hashCode()`
`boolean`	`isAbsolute()` Returns true if the path component (i.e. directory) of this URI is absolute.
`boolean`	`isAbsoluteAndSchemeAuthorityNull()` Returns true if the path component (i.e. directory) of this URI is absolute and the scheme is null, and the authority is null.
`boolean`	`isRoot()` Returns true if and only if this path represents the root of a file system.
`boolean`	`isUriPathAbsolute()` Returns true if the path component (i.e. directory) of this URI is absolute.
`static boolean`	`isWindowsAbsolutePath(String pathString, boolean slashed)` Determine whether a given path string represents an absolute path on Windows. e.g.
`Path`	`makeQualified(FileSystem fs)` 非推奨です。 use `makeQualified(URI, Path)`
`static Path`	`mergePaths(Path path1, Path path2)` Merge 2 paths such that the second path is appended relative to the first.
`Path`	`suffix(String suffix)` Adds a suffix to the final name in the path.
`String`	`toString()`
`URI`	`toUri()` Convert this Path to a URI.
`void`	`validateObject()` Validate the contents of a deserialized Path, so as to defend against malicious object streams.

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

- フィールドの詳細
  - SEPARATOR
```
public static final String SEPARATOR
```
    The directory separator, a slash.
    
    関連項目:
    
    定数フィールド値
  - SEPARATOR_CHAR
```
public static final char SEPARATOR_CHAR
```
    The directory separator, a slash, as a character.
    
    関連項目:
    
    定数フィールド値
  - CUR_DIR
```
public static final String CUR_DIR
```
    The current directory, ".".
    
    関連項目:
    
    定数フィールド値
  - WINDOWS
```
public static final boolean WINDOWS
```
    Whether the current host is a Windows machine.
- コンストラクタの詳細
  - Path
```
public Path(String parent,
            String child)
```
    Create a new Path based on the child path resolved against the parent path.
    
    パラメータ:
    
    parent - the parent path
    
    child - the child path
  - Path
```
public Path(Path parent,
            String child)
```
    Create a new Path based on the child path resolved against the parent path.
    
    パラメータ:
    
    parent - the parent path
    
    child - the child path
  - Path
```
public Path(String parent,
            Path child)
```
    Create a new Path based on the child path resolved against the parent path.
    
    パラメータ:
    
    parent - the parent path
    
    child - the child path
  - Path
```
public Path(Path parent,
            Path child)
```
    Create a new Path based on the child path resolved against the parent path.
    
    パラメータ:
    
    parent - the parent path
    
    child - the child path
  - Path
```
public Path(String pathString)
     throws IllegalArgumentException
```
    Construct a path from a String. Path strings are URIs, but with unescaped elements and some additional normalization.
    
    パラメータ:
    
    pathString - the path string
    
    例外:
    
    IllegalArgumentException
  - Path
```
public Path(URI aUri)
```
    Construct a path from a URI
    
    パラメータ:
    
    aUri - the source URI
  - Path
```
public Path(String scheme,
            String authority,
            String path)
```
    Construct a Path from components.
    
    パラメータ:
    
    scheme - the scheme
    
    authority - the authority
    
    path - the path
- メソッドの詳細
  - getPathWithoutSchemeAndAuthority
```
public static Path getPathWithoutSchemeAndAuthority(Path path)
```
    Return a version of the given Path without the scheme information.
    
    パラメータ:
    
    path - the source Path
    
    戻り値:
    
    a copy of this Path without the scheme information
  - mergePaths
```
public static Path mergePaths(Path path1,
                              Path path2)
```
    Merge 2 paths such that the second path is appended relative to the first. The returned path has the scheme and authority of the first path. On Windows, the drive specification in the second path is discarded.
    
    パラメータ:
    
    path1 - the first path
    
    path2 - the second path, to be appended relative to path1
    
    戻り値:
    
    the merged path
  - isWindowsAbsolutePath
```
public static boolean isWindowsAbsolutePath(String pathString,
                                            boolean slashed)
```
    Determine whether a given path string represents an absolute path on Windows. e.g. "C:/a/b" is an absolute path. "C:a/b" is not.
    
    パラメータ:
    
    pathString - the path string to evaluate
    
    slashed - true if the given path is prefixed with "/"
    
    戻り値:
    
    true if the supplied path looks like an absolute path with a Windows drive-specifier
  - toUri
```
public URI toUri()
```
    Convert this Path to a URI.
    
    戻り値:
    
    this Path as a URI
  - getFileSystem
```
public FileSystem getFileSystem(Configuration conf)
                         throws IOException
```
    Return the FileSystem that owns this Path.
    
    パラメータ:
    
    conf - the configuration to use when resolving the FileSystem
    
    戻り値:
    
    the FileSystem that owns this Path
    
    例外:
    
    IOException - thrown if there's an issue resolving the FileSystem
  - isAbsoluteAndSchemeAuthorityNull
```
public boolean isAbsoluteAndSchemeAuthorityNull()
```
    Returns true if the path component (i.e. directory) of this URI is absolute and the scheme is null, and the authority is null.
    
    戻り値:
    
    whether the path is absolute and the URI has no scheme nor authority parts
  - isUriPathAbsolute
```
public boolean isUriPathAbsolute()
```
    Returns true if the path component (i.e. directory) of this URI is absolute.
    
    戻り値:
    
    whether this URI's path is absolute
  - isAbsolute
```
public boolean isAbsolute()
```
    Returns true if the path component (i.e. directory) of this URI is absolute. This method is a wrapper for isUriPathAbsolute().
    
    戻り値:
    
    whether this URI's path is absolute
  - isRoot
```
public boolean isRoot()
```
    Returns true if and only if this path represents the root of a file system.
    
    戻り値:
    
    true if and only if this path represents the root of a file system
  - getName
```
public String getName()
```
    Returns the final component of this path.
    
    戻り値:
    
    the final component of this path
  - getParent
```
public Path getParent()
```
    Returns the parent of a path or null if at root.
    
    戻り値:
    
    the parent of a path or null if at root
  - suffix
```
public Path suffix(String suffix)
```
    Adds a suffix to the final name in the path.
    
    パラメータ:
    
    suffix - the suffix to add
    
    戻り値:
    
    a new path with the suffix added
  - toString
```
public String toString()
```
    オーバーライド:
    
    toString クラス内 Object
  - equals
```
public boolean equals(Object o)
```
    オーバーライド:
    
    equals クラス内 Object
  - hashCode
```
public int hashCode()
```
    オーバーライド:
    
    hashCode クラス内 Object
  - compareTo
```
public int compareTo(Object o)
```
    定義:
    
    compareTo インタフェース内 Comparable
  - depth
```
public int depth()
```
    Returns the number of elements in this path.
    
    戻り値:
    
    the number of elements in this path
  - makeQualified
```
@Deprecated
public Path makeQualified(FileSystem fs)
```
    非推奨です。 use makeQualified(URI, Path)
    
    Returns a qualified path object for the FileSystem's working directory.
    
    パラメータ:
    
    fs - the target FileSystem
    
    戻り値:
    
    a qualified path object for the FileSystem's working directory
  - validateObject
```
public void validateObject()
                    throws InvalidObjectException
```
    Validate the contents of a deserialized Path, so as to defend against malicious object streams.
    
    定義:
    
    validateObject インタフェース内 ObjectInputValidation
    
    例外:
    
    InvalidObjectException - if there's no URI

クラス Path

フィールドのサマリー

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 java.lang.Object

フィールドの詳細

SEPARATOR

SEPARATOR_CHAR

CUR_DIR

WINDOWS

コンストラクタの詳細

Path

Path

Path

Path

Path

Path

Path

メソッドの詳細

getPathWithoutSchemeAndAuthority

mergePaths

isWindowsAbsolutePath

toUri

getFileSystem

isAbsoluteAndSchemeAuthorityNull

isUriPathAbsolute

isAbsolute

isRoot

getName

getParent

suffix

toString

equals

hashCode

compareTo

depth

makeQualified

validateObject