FilePathMem

java.lang.Object
- org.h2.store.fs.FilePath
- - org.h2.store.fs.FilePathMem

```
public class FilePathMem
extends FilePath
```
This file system keeps files fully in 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

FilePathMem()

Constructors
Constructor and Description
`FilePathMem()`

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 for this file name.
`FilePathMem`	`getParent()` Get the parent directory of a file or directory.
`FilePathMem`	`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.
`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.io.InputStream`	`newInputStream()` Create an input stream to read from the file.
`java.io.OutputStream`	`newOutputStream(boolean append)` Create an output stream to write into the file.
`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
`FilePathMem`	`toRealPath()` Normalize a file name.

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

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

- Constructor Detail
  - FilePathMem
```
public FilePathMem()
```
- Method Detail
  - getPath
```
public FilePathMem 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 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 FilePathMem 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
  - 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 FilePathMem 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
  - newOutputStream
```
public java.io.OutputStream newOutputStream(boolean append)
                                     throws java.io.IOException
```
    Description copied from class: FilePath
    
    Create an output stream to write into the file.
    
    Specified by:
    
    newOutputStream in class FilePath
    
    Parameters:
    
    append - if true, the file will grow, if false, the file will be truncated first
    
    Returns:
    
    the output stream
    
    Throws:
    
    java.io.IOException
  - newInputStream
```
public java.io.InputStream newInputStream()
```
    Description copied from class: FilePath
    
    Create an input stream to read from the file.
    
    Specified by:
    
    newInputStream in class FilePath
    
    Returns:
    
    the input stream
  - 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
  - getCanonicalPath
```
protected static java.lang.String getCanonicalPath(java.lang.String fileName)
```
    Get the canonical path for this file name.
    
    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 FilePathMem

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

FilePathMem

Method Detail

getPath

size

moveTo

createFile

exists

delete

newDirectoryStream

setReadOnly

canWrite

getParent

isDirectory

isAbsolute

toRealPath

lastModified

createDirectory

newOutputStream

newInputStream

open

getCanonicalPath

getScheme