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## org.vertx.groovy.core.file
[Groovy] Class FileSystem

    java.lang.Object
      org.vertx.groovy.core.file.FileSystem

    class FileSystem

Contains a broad set of operations for manipulating files.

An asynchronous and a synchronous version of each operation is provided.

The asynchronous versions take an `AsynchronousResultHandler` which is called when the operation completes or an error occurs.

The synchronous versions return the results, or throw exceptions directly.

It is highly recommended the asynchronous versions are used unless you are sure the operation will not block for a significant period of time

Authors:
  Tim Fox

Property Summary
`static java.io.FileSystem` | `instance`

Method Summary
`void` | `chmod(java.lang.String path, java.lang.String perms, java.lang.String dirPerms = null, groovy.lang.Closure handler)` Change the permissions on the file represented by `path` to `perms`, asynchronously.
`void` | `chmodSync(java.lang.String path, java.lang.String perms, java.lang.String dirPerms = null)` Synchronous version of chmod(String, String, String, Closure)
`void` | `copy(java.lang.String from, java.lang.String to, boolean recursive = false, groovy.lang.Closure handler)` Copy a file from the path `from` to path `to`, asynchronously.
`void` | `copySync(java.lang.String from, java.lang.String to, boolean recursive = false)` Synchronous version of copy(String, String, boolean, Closure)
`void` | `createFile(java.lang.String path, java.lang.String perms = null, groovy.lang.Closure handler)` Creates an empty file with the specified `path`, asynchronously.
`void` | `createFileSync(java.lang.String path, java.lang.String perms = null)` Synchronous version of createFile(String, String, Closure)
`void` | `delete(java.lang.String path, boolean recursive = false, groovy.lang.Closure handler)` Deletes the file represented by the specified `path`, asynchronously.
`void` | `deleteSync(java.lang.String path, boolean recursive)` Synchronous version of delete(String, boolean, Closure)
`void` | `exists(java.lang.String path, groovy.lang.Closure handler)` Determines whether the file as specified by the path `path` exists, asynchronously.
`boolean` | `existsSync(java.lang.String path)` Synchronous version of exists(String, Closure)
`void` | `fsProps(java.lang.String path, groovy.lang.Closure handler)` Returns properties of the file-system being used by the specified `path`, asynchronously.
`FileSystemProps` | `fsPropsSync(java.lang.String path)` Synchronous version of fsProps(String, Closure)
`void` | `link(java.lang.String link, java.lang.String existing, groovy.lang.Closure handler)` Create a hard link on the file system from `link` to `existing`, asynchronously.
`void` | `linkSync(java.lang.String link, java.lang.String existing)` Synchronous version of link(String, String, Closure)
`void` | `lprops(java.lang.String path, groovy.lang.Closure handler)` Obtain properties for the link represented by `path`, asynchronously.
`FileProps` | `lpropsSync(java.lang.String path)` Synchronous version of lprops(String, Closure)
`void` | `mkdir(java.lang.String path, java.lang.String perms = null, boolean createParents = false, groovy.lang.Closure handler)` Create the directory represented by `path`, asynchronously.
`void` | `mkdirSync(java.lang.String path, java.lang.String perms = null, boolean createParents = false)` Synchronous version of mkdir(String, String, boolean, Closure)
`void` | `move(java.lang.String from, java.lang.String to, groovy.lang.Closure handler)` Move a file from the path `from` to path `to`, asynchronously.
`void` | `moveSync(java.lang.String from, java.lang.String to)` Synchronous version of move(String, String, Closure)
`void` | `open(java.lang.String path, java.lang.String perms = null, boolean read = true, boolean write = true, boolean createNew = true, boolean flush = false, groovy.lang.Closure handler)` Open the file represented by `path`, asynchronously.
`AsyncFile` | `openSync(java.lang.String path, java.lang.String perms = null, boolean read = true, boolean write = true, boolean createNew = true, boolean flush = false)` Synchronous version of open(String, String, boolean, boolean, boolean, boolean, Closure)
`void` | `props(java.lang.String path, groovy.lang.Closure handler)` Obtain properties for the file represented by `path`, asynchronously.
`FileProps` | `propsSync(java.lang.String path)` Synchronous version of props(String, Closure)
`void` | `readDir(java.lang.String path, java.lang.String filter = null, groovy.lang.Closure handler)` Read the contents of the directory specified by `path`, asynchronously.
`java.lang.String[]` | `readDirSync(java.lang.String path, java.lang.String filter)` Synchronous version of readDir(String, String, Closure)
`void` | `readFile(java.lang.String path, groovy.lang.Closure handler)` Reads the entire file as represented by the path `path` as a Buffer, asynchronously.
`Buffer` | `readFileSync(java.lang.String path)` Synchronous version of readFile(String, Closure)
`void` | `readSymlink(java.lang.String link, groovy.lang.Closure handler)` Returns the path representing the file that the symbolic link specified by `link` points to, asynchronously.
`java.lang.String` | `readSymlinkSync(java.lang.String link)` Synchronous version of readSymlink(String, Closure)
`void` | `symlink(java.lang.String link, java.lang.String existing, groovy.lang.Closure handler)` Create a symbolic link on the file system from `link` to `existing`, asynchronously.
`void` | `symlinkSync(java.lang.String link, java.lang.String existing)` Synchronous version of link(String, String, Closure)
`void` | `truncate(java.lang.String path, long len, groovy.lang.Closure handler)` Truncate the file represented by `path` to length `len` in bytes, asynchronously.
`void` | `truncateSync(java.lang.String path, long len)` Synchronous version of truncate(String, long, Closure)
`void` | `unlink(java.lang.String link, groovy.lang.Closure handler)` Unlinks the link on the file system represented by the path `link`, asynchronously.
`void` | `unlinkSync(java.lang.String link)` Synchronous version of unlink(String, Closure)
`void` | `writeFile(java.lang.String path, Buffer data, groovy.lang.Closure handler)` Creates the file, and writes the specified `Buffer data` to the file represented by the path `path`, asynchronously.
`void` | `writeFile(java.lang.String path, java.lang.String data, groovy.lang.Closure handler)` Creates the file, and writes the specified `String data` to the file represented by the path `path`, asynchronously.
`void` | `writeFileSync(java.lang.String path, Buffer data)` Synchronous version of writeFile(String, Buffer, Closure)
`void` | `writeFileSync(java.lang.String path, java.lang.String data)` Synchronous version of writeFile(String, String, Closure)

Methods inherited from class java.lang.Object
java.lang.Object#wait(long, int), java.lang.Object#wait(long), java.lang.Object#wait(), java.lang.Object#equals(java.lang.Object), java.lang.Object#toString(), java.lang.Object#hashCode(), java.lang.Object#getClass(), java.lang.Object#notify(), java.lang.Object#notifyAll()

Property Detail

### instance

    static java.io.FileSystem instance

Method Detail

### chmod

    void chmod(java.lang.String path, java.lang.String perms, java.lang.String dirPerms = null, groovy.lang.Closure handler)

  Change the permissions on the file represented by `path` to `perms`, asynchronously. The permission String takes the form rwxr-x--- as specified in {here}.

  If the file is directory then all contents will also have their permissions changed recursively. Any directory permissions will be set to `dirPerms`, whilst any normal file permissions will be set to `perms`.

### chmodSync

    void chmodSync(java.lang.String path, java.lang.String perms, java.lang.String dirPerms = null)

  Synchronous version of chmod(String, String, String, Closure)

### copy

    void copy(java.lang.String from, java.lang.String to, boolean recursive = false, groovy.lang.Closure handler)

  Copy a file from the path `from` to path `to`, asynchronously.

  If `recursive` is `true` and `from` represents a directory, then the directory and its contents will be copied recursively to the destination `to`.

  The copy will fail if the destination if the destination already exists.

### copySync

    void copySync(java.lang.String from, java.lang.String to, boolean recursive = false)

  Synchronous version of copy(String, String, boolean, Closure)

### createFile

    void createFile(java.lang.String path, java.lang.String perms = null, groovy.lang.Closure handler)

  Creates an empty file with the specified `path`, asynchronously.

### createFileSync

    void createFileSync(java.lang.String path, java.lang.String perms = null)

  Synchronous version of createFile(String, String, Closure)

### delete

    void delete(java.lang.String path, boolean recursive = false, groovy.lang.Closure handler)

  Deletes the file represented by the specified `path`, asynchronously.

  If the path represents a directory and `recursive = true` then the directory and its contents will be deleted recursively.

### deleteSync

    void deleteSync(java.lang.String path, boolean recursive)

  Synchronous version of delete(String, boolean, Closure)

### exists

    void exists(java.lang.String path, groovy.lang.Closure handler)

  Determines whether the file as specified by the path `path` exists, asynchronously.

### existsSync

    boolean existsSync(java.lang.String path)

  Synchronous version of exists(String, Closure)

### fsProps

    void fsProps(java.lang.String path, groovy.lang.Closure handler)

  Returns properties of the file-system being used by the specified `path`, asynchronously.

### fsPropsSync

    FileSystemProps fsPropsSync(java.lang.String path)

  Synchronous version of fsProps(String, Closure)

### link

    void link(java.lang.String link, java.lang.String existing, groovy.lang.Closure handler)

  Create a hard link on the file system from `link` to `existing`, asynchronously.

### linkSync

    void linkSync(java.lang.String link, java.lang.String existing)

  Synchronous version of link(String, String, Closure)

### lprops

    void lprops(java.lang.String path, groovy.lang.Closure handler)

  Obtain properties for the link represented by `path`, asynchronously. The link will not be followed.

### lpropsSync

    FileProps lpropsSync(java.lang.String path)

  Synchronous version of lprops(String, Closure)

### mkdir

    void mkdir(java.lang.String path, java.lang.String perms = null, boolean createParents = false, groovy.lang.Closure handler)

  Create the directory represented by `path`, asynchronously.

  The new directory will be created with permissions as specified by `perms`. The permission String takes the form rwxr-x--- as specified in here.

  If `createParents` is set to `true` then any non-existent parent directories of the directory will also be created.

  The operation will fail if the directory already exists.

### mkdirSync

    void mkdirSync(java.lang.String path, java.lang.String perms = null, boolean createParents = false)

  Synchronous version of mkdir(String, String, boolean, Closure)

### move

    void move(java.lang.String from, java.lang.String to, groovy.lang.Closure handler)

  Move a file from the path `from` to path `to`, asynchronously.

  The move will fail if the destination already exists.

### moveSync

    void moveSync(java.lang.String from, java.lang.String to)

  Synchronous version of move(String, String, Closure)

### open

    void open(java.lang.String path, java.lang.String perms = null, boolean read = true, boolean write = true, boolean createNew = true, boolean flush = false, groovy.lang.Closure handler)

  Open the file represented by `path`, asynchronously.

  If `read` is `true` the file will be opened for reading. If `write` is `true` the file will be opened for writing.

  If the file does not already exist and `createNew` is `true` it will be created with the permissions as specified by `perms`, otherwise the operation will fail.

  If `flush` is `true` then all writes will be automatically flushed through OS buffers to the underlying storage on each write.

### openSync

    AsyncFile openSync(java.lang.String path, java.lang.String perms = null, boolean read = true, boolean write = true, boolean createNew = true, boolean flush = false)

  Synchronous version of open(String, String, boolean, boolean, boolean, boolean, Closure)

### props

    void props(java.lang.String path, groovy.lang.Closure handler)

  Obtain properties for the file represented by `path`, asynchronously. If the file is a link, the link will be followed.

### propsSync

    FileProps propsSync(java.lang.String path)

  Synchronous version of props(String, Closure)

### readDir

    void readDir(java.lang.String path, java.lang.String filter = null, groovy.lang.Closure handler)

  Read the contents of the directory specified by `path`, asynchronously.

  The result is an array of String representing the paths of the files inside the directory.

### readDirSync

    java.lang.String[] readDirSync(java.lang.String path, java.lang.String filter)

  Synchronous version of readDir(String, String, Closure)

### readFile

    void readFile(java.lang.String path, groovy.lang.Closure handler)

  Reads the entire file as represented by the path `path` as a Buffer, asynchronously.

  Do not user this method to read very large files or you risk running out of available RAM.

### readFileSync

    Buffer readFileSync(java.lang.String path)

  Synchronous version of readFile(String, Closure)

### readSymlink

    void readSymlink(java.lang.String link, groovy.lang.Closure handler)

  Returns the path representing the file that the symbolic link specified by `link` points to, asynchronously.

### readSymlinkSync

    java.lang.String readSymlinkSync(java.lang.String link)

  Synchronous version of readSymlink(String, Closure)

### symlink

    void symlink(java.lang.String link, java.lang.String existing, groovy.lang.Closure handler)

  Create a symbolic link on the file system from `link` to `existing`, asynchronously.

### symlinkSync

    void symlinkSync(java.lang.String link, java.lang.String existing)

  Synchronous version of link(String, String, Closure)

### truncate

    void truncate(java.lang.String path, long len, groovy.lang.Closure handler)

  Truncate the file represented by `path` to length `len` in bytes, asynchronously.

  The operation will fail if the file does not exist or `len` is less than `zero`.

### truncateSync

    void truncateSync(java.lang.String path, long len)

  Synchronous version of truncate(String, long, Closure)

### unlink

    void unlink(java.lang.String link, groovy.lang.Closure handler)

  Unlinks the link on the file system represented by the path `link`, asynchronously.

### unlinkSync

    void unlinkSync(java.lang.String link)

  Synchronous version of unlink(String, Closure)

### writeFile

    void writeFile(java.lang.String path, Buffer data, groovy.lang.Closure handler)

  Creates the file, and writes the specified `Buffer data` to the file represented by the path `path`, asynchronously.

### writeFile

    void writeFile(java.lang.String path, java.lang.String data, groovy.lang.Closure handler)

  Creates the file, and writes the specified `String data` to the file represented by the path `path`, asynchronously.

### writeFileSync

    void writeFileSync(java.lang.String path, Buffer data)

  Synchronous version of writeFile(String, Buffer, Closure)

### writeFileSync

    void writeFileSync(java.lang.String path, java.lang.String data)

  Synchronous version of writeFile(String, String, Closure)

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