FilePathNioMem

java.lang.Object
- org.h2.store.fs.FilePath
- - org.h2.store.fs.niomem.FilePathNioMem

Direct Known Subclasses:

FilePathNioMemLZF
```
public class FilePathNioMem
extends FilePath
```
This file system keeps files fully in off-java-heap memory. There is an option to compress file blocks to save memory.

Field Summary
- Fields inherited from class org.h2.store.fs.FilePath
  name

Constructor Summary

Constructors
Constructor and Description

FilePathNioMem()

Constructors
Constructor and Description
`FilePathNioMem()`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`canWrite()` Check if the file is writable.
`void`	`createDirectory()` Create a directory (all required parent directories already exist).
`boolean`	`createFile()` Create a new file.
`void`	`delete()` Delete a file or directory if it exists.
`boolean`	`exists()` Checks if a file exists.
`protected static java.lang.String`	`getCanonicalPath(java.lang.String fileName)` Get the canonical path of a file (with backslashes replaced with forward slashes).
`FilePathNioMem`	`getParent()` Get the parent directory of a file or directory.
`FilePathNioMem`	`getPath(java.lang.String path)` Convert a file to a path.
`java.lang.String`	`getScheme()` Get the scheme (prefix) for this file provider.
`boolean`	`isAbsolute()` Check if the file name includes a path.
`boolean`	`isDirectory()` Check if it is a file or a directory.
`boolean`	`isRegularFile()` Check if it is a regular file.
`protected boolean`	`isRoot()`
`long`	`lastModified()` Get the last modified date of a file
`void`	`moveTo(FilePath newName, boolean atomicReplace)` Rename a file if this is allowed.
`java.util.List<FilePath>`	`newDirectoryStream()` List the files and directories in the given directory.
`java.nio.channels.FileChannel`	`open(java.lang.String mode)` Open a random access file object.
`boolean`	`setReadOnly()` Disable the ability to write.
`long`	`size()` Get the size of a file in bytes
`FilePathNioMem`	`toRealPath()` Normalize a file name.

Methods inherited from class org.h2.store.fs.FilePath
createTempFile, get, getName, newFileChannelOutputStream, newInputStream, newOutputStream, register, toString, unregister, unwrap

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - FilePathNioMem
```
public FilePathNioMem()
```
- Method Detail
  - getPath
```
public FilePathNioMem getPath(java.lang.String path)
```
    Description copied from class: FilePath
    
    Convert a file to a path. This is similar to java.nio.file.spi.FileSystemProvider.getPath, but may return an object even if the scheme doesn't match in case of the default file provider.
    
    Specified by:
    
    getPath in class FilePath
    
    Parameters:
    
    path - the path
    
    Returns:
    
    the file path object
  - size
```
public long size()
```
    Description copied from class: FilePath
    
    Get the size of a file in bytes
    
    Specified by:
    
    size in class FilePath
    
    Returns:
    
    the size in bytes
  - moveTo
```
public void moveTo(FilePath newName,
                   boolean atomicReplace)
```
    Description copied from class: FilePath
    
    Rename a file if this is allowed.
    
    Specified by:
    
    moveTo in class FilePath
    
    Parameters:
    
    newName - the new fully qualified file name
    
    atomicReplace - whether the move should be atomic, and the target file should be replaced if it exists and replacing is possible
  - createFile
```
public boolean createFile()
```
    Description copied from class: FilePath
    
    Create a new file.
    
    Specified by:
    
    createFile in class FilePath
    
    Returns:
    
    true if creating was successful
  - exists
```
public boolean exists()
```
    Description copied from class: FilePath
    
    Checks if a file exists.
    
    Specified by:
    
    exists in class FilePath
    
    Returns:
    
    true if it exists
  - delete
```
public void delete()
```
    Description copied from class: FilePath
    
    Delete a file or directory if it exists. Directories may only be deleted if they are empty.
    
    Specified by:
    
    delete in class FilePath
  - newDirectoryStream
```
public java.util.List<FilePath> newDirectoryStream()
```
    Description copied from class: FilePath
    
    List the files and directories in the given directory.
    
    Specified by:
    
    newDirectoryStream in class FilePath
    
    Returns:
    
    the list of fully qualified file names
  - setReadOnly
```
public boolean setReadOnly()
```
    Description copied from class: FilePath
    
    Disable the ability to write.
    
    Specified by:
    
    setReadOnly in class FilePath
    
    Returns:
    
    true if the call was successful
  - canWrite
```
public boolean canWrite()
```
    Description copied from class: FilePath
    
    Check if the file is writable.
    
    Specified by:
    
    canWrite in class FilePath
    
    Returns:
    
    if the file is writable
  - getParent
```
public FilePathNioMem getParent()
```
    Description copied from class: FilePath
    
    Get the parent directory of a file or directory.
    
    Specified by:
    
    getParent in class FilePath
    
    Returns:
    
    the parent directory name
  - isDirectory
```
public boolean isDirectory()
```
    Description copied from class: FilePath
    
    Check if it is a file or a directory.
    
    Specified by:
    
    isDirectory in class FilePath
    
    Returns:
    
    true if it is a directory
  - isRegularFile
```
public boolean isRegularFile()
```
    Description copied from class: FilePath
    
    Check if it is a regular file.
    
    Specified by:
    
    isRegularFile in class FilePath
    
    Returns:
    
    true if it is a regular file
  - isAbsolute
```
public boolean isAbsolute()
```
    Description copied from class: FilePath
    
    Check if the file name includes a path.
    
    Specified by:
    
    isAbsolute in class FilePath
    
    Returns:
    
    if the file name is absolute
  - toRealPath
```
public FilePathNioMem toRealPath()
```
    Description copied from class: FilePath
    
    Normalize a file name.
    
    Specified by:
    
    toRealPath in class FilePath
    
    Returns:
    
    the normalized file name
  - lastModified
```
public long lastModified()
```
    Description copied from class: FilePath
    
    Get the last modified date of a file
    
    Specified by:
    
    lastModified in class FilePath
    
    Returns:
    
    the last modified date
  - createDirectory
```
public void createDirectory()
```
    Description copied from class: FilePath
    
    Create a directory (all required parent directories already exist).
    
    Specified by:
    
    createDirectory in class FilePath
  - open
```
public java.nio.channels.FileChannel open(java.lang.String mode)
```
    Description copied from class: FilePath
    
    Open a random access file object.
    
    Specified by:
    
    open in class FilePath
    
    Parameters:
    
    mode - the access mode. Supported are r, rw, rws, rwd
    
    Returns:
    
    the file object
  - isRoot
```
protected boolean isRoot()
```
  - getCanonicalPath
```
protected static java.lang.String getCanonicalPath(java.lang.String fileName)
```
    Get the canonical path of a file (with backslashes replaced with forward slashes).
    
    Parameters:
    
    fileName - the file name
    
    Returns:
    
    the canonical path
  - getScheme
```
public java.lang.String getScheme()
```
    Description copied from class: FilePath
    
    Get the scheme (prefix) for this file provider. This is similar to java.nio.file.spi.FileSystemProvider.getScheme.
    
    Specified by:
    
    getScheme in class FilePath
    
    Returns:
    
    the scheme

Class FilePathNioMem

Field Summary

Fields inherited from class org.h2.store.fs.FilePath

Constructor Summary

Method Summary

Methods inherited from class org.h2.store.fs.FilePath

Methods inherited from class java.lang.Object

Constructor Detail

FilePathNioMem

Method Detail

getPath

size

moveTo

createFile

exists

delete

newDirectoryStream

setReadOnly

canWrite

getParent

isDirectory

isRegularFile

isAbsolute

toRealPath

lastModified

createDirectory

open

isRoot

getCanonicalPath

getScheme