Package nl.basjes.parse.useragent.utils.springframework.core.io

Class FileSystemResource

java.lang.Object

nl.basjes.parse.useragent.utils.springframework.core.io.AbstractResource

nl.basjes.parse.useragent.utils.springframework.core.io.FileSystemResource

All Implemented Interfaces:

InputStreamSource, Resource

public class FileSystemResource
extends AbstractResource
implements Resource

{link Resource} implementation for java.io.File and java.nio.file.Path handles with a file system target. Supports resolution as a File and also as a URL. Implements the extended {link WritableResource} interface.

Note: As of Spring Framework 5.0, this {link Resource} implementation uses NIO.2 API for read/write interactions. As of 5.1, it may be constructed with a {link java.nio.file.Path} handle in which case it will perform all file system interactions via NIO.2, only resorting to {link File} on {link #getFile()}.

Since:

28.12.2003

Author:

Juergen Hoeller see #FileSystemResource(String) see #FileSystemResource(File) see #FileSystemResource(Path) see java.io.File see java.nio.file.Files

Constructor Summary

Constructors

Constructor	Description
FileSystemResource(File filE)	Create a new FileSystemResource from a {link File} handle.
FileSystemResource(String path)	Create a new FileSystemResource from a file path.
FileSystemResource(FileSystem fileSystem, String path)	Create a new FileSystemResource from a {link FileSystem} handle, locating the specified path.

Method Summary

Modifier and Type	Method	Description
long	contentLength()	This implementation returns the underlying File/Path length.
Resource	createRelative(String relativePath)	This implementation creates a FileSystemResource, applying the given path relative to the path of the underlying file of this resource descriptor.
boolean	equals(Object other)	This implementation compares the underlying File references.
boolean	exists()	This implementation returns whether the underlying file exists.
String	getDescription()	This implementation returns a description that includes the absolute path of the file.
File	getFile()	This implementation returns the underlying File reference.
String	getFilename()	This implementation returns the name of the file.
InputStream	getInputStream()	This implementation opens a NIO file stream for the underlying file.
final String	getPath()	Return the file path for this resource.
URI	getURI()	This implementation returns a URI for the underlying file.
URL	getURL()	This implementation returns a URL for the underlying file.
int	hashCode()	This implementation returns the hash code of the underlying File reference.
boolean	isFile()	This implementation always indicates a file.

Methods inherited from class nl.basjes.parse.useragent.utils.springframework.core.io.AbstractResource

isOpen, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface nl.basjes.parse.useragent.utils.springframework.core.io.Resource

isOpen

Constructor Details

FileSystemResource

public FileSystemResource(String path)

Create a new FileSystemResource from a file path.

Note: When building relative resources via {link #createRelative}, it makes a difference whether the specified resource base path here ends with a slash or not. In the case of "C:/dir1/", relative paths will be built underneath that root: e.g. relative path "dir2" → "C:/dir1/dir2". In the case of "C:/dir1", relative paths will apply at the same directory level: relative path "dir2" → "C:/dir2".

Parameters:

path - a file path see #FileSystemResource(Path)

FileSystemResource

public FileSystemResource(@Nonnull
 File filE)

Create a new FileSystemResource from a {link File} handle.

Note: When building relative resources via {link #createRelative}, the relative path will apply at the same directory level: e.g. new File("C:/dir1"), relative path "dir2" → "C:/dir2"! If you prefer to have relative paths built underneath the given root directory, use the {link #FileSystemResource(String) constructor with a file path} to append a trailing slash to the root path: "C:/dir1/", which indicates this directory as root for all relative paths.

Parameters:

filE - a File handle see #FileSystemResource(Path) see #getFile()

FileSystemResource

public FileSystemResource(FileSystem fileSystem,
 String path)

Create a new FileSystemResource from a {link FileSystem} handle, locating the specified path.

This is an alternative to {link #FileSystemResource(String)}, performing all file system interactions via NIO.2 instead of {link File}.

Parameters:

fileSystem - the FileSystem to locate the path within

path - a file path see #FileSystemResource(File)

Since:

5.1.1

Method Details

getPath

public final String getPath()

Return the file path for this resource.

exists

public boolean exists()

This implementation returns whether the underlying file exists. see java.io.File#exists()

Specified by:

exists in interface Resource

Overrides:

exists in class AbstractResource

getInputStream

public InputStream getInputStream()
                           throws IOException

This implementation opens a NIO file stream for the underlying file. see java.io.FileInputStream

Specified by:

getInputStream in interface InputStreamSource

Returns:

the input stream for the underlying resource (must not be null)

Throws:

FileNotFoundException - if the underlying resource does not exist

IOException - if the content stream could not be opened see Resource#isReadable()

getURL

public URL getURL()
           throws IOException

This implementation returns a URL for the underlying file. see java.io.File#toURI()

Specified by:

getURL in interface Resource

Overrides:

getURL in class AbstractResource

Throws:

IOException - if the resource cannot be resolved as URL, i.e. if the resource is not available as a descriptor

getURI

public URI getURI()
           throws IOException

This implementation returns a URI for the underlying file. see java.io.File#toURI()

Specified by:

getURI in interface Resource

Overrides:

getURI in class AbstractResource

Throws:

IOException - if the resource cannot be resolved as URI, i.e. if the resource is not available as a descriptor

isFile

public boolean isFile()

This implementation always indicates a file.

Specified by:

isFile in interface Resource

Overrides:

isFile in class AbstractResource

getFile

public File getFile()

This implementation returns the underlying File reference.

Specified by:

getFile in interface Resource

Overrides:

getFile in class AbstractResource

contentLength

public long contentLength()
                   throws IOException

This implementation returns the underlying File/Path length.

Specified by:

contentLength in interface Resource

Overrides:

contentLength in class AbstractResource

Throws:

IOException - if the resource cannot be resolved (in the file system or as some other known physical resource type)

createRelative

public Resource createRelative(String relativePath)

This implementation creates a FileSystemResource, applying the given path relative to the path of the underlying file of this resource descriptor. see org.springframework.util.StringUtils#applyRelativePath(String, String)

Specified by:

createRelative in interface Resource

Overrides:

createRelative in class AbstractResource

Parameters:

relativePath - the relative path (relative to this resource)

Returns:

the resource handle for the relative resource

getFilename

public String getFilename()

This implementation returns the name of the file. see java.io.File#getName()

Specified by:

getFilename in interface Resource

Overrides:

getFilename in class AbstractResource

getDescription

public String getDescription()

This implementation returns a description that includes the absolute path of the file. see java.io.File#getAbsolutePath()

Specified by:

getDescription in interface Resource

equals

public boolean equals(@Nullable
 Object other)

This implementation compares the underlying File references.

Overrides:

equals in class AbstractResource

hashCode

public int hashCode()

This implementation returns the hash code of the underlying File reference.

Overrides:

hashCode in class AbstractResource