docs/fileentry/fileentry.md

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         to you under the Apache License, Version 2.0 (the
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           http://www.apache.org/licenses/LICENSE-2.0

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---

FileEntry
==========

Represents a file on a file system, as defined in the
[W3C Directories and Systems](http://www.w3.org/TR/file-system-api/)
specification.

Properties
----------

- __isFile__: Always true. _(boolean)_
- __isDirectory__: Always false. _(boolean)_
- __name__: The name of the `FileEntry`, excluding the path leading to it. _(DOMString)_
- __fullPath__: The full absolute path from the root to the `FileEntry`. _(DOMString)_

__NOTE:__ The following attribute is defined by the W3C specification,
but is _not_ supported:

- __filesystem__: The file system on which the `FileEntry` resides. _(FileSystem)_

Methods
-------

- __getMetadata__: Look up metadata about a file.
- __setMetadata__: Set metadata on a file.
- __moveTo__: Move a file to a different location on the file system.
- __copyTo__: Copy a file to a different location on the file system.
- __toURL__: Return a URL that can be used to locate a file.
- __remove__: Delete a file.
- __getParent__: Look up the parent directory.
- __createWriter__: Creates a `FileWriter` object that can be used to write to a file.
- __file__: Creates a `File` object containing file properties.

Supported Platforms
-------------------

- Android
- BlackBerry WebWorks (OS 5.0 and higher)
- iOS
- Windows Phone 7 and 8
- Windows 8

getMetadata
----------------

Look up metadata about a file.

__Parameters:__

- __successCallback__: A callback that is passed a `Metadata` object. _(Function)_
- __errorCallback__: A callback that executes if an error occurs when retrieving the `Metadata`. Invoked with a `FileError` object. _(Function)_

__Quick Example__

    function success(metadata) {
        console.log("Last Modified: " + metadata.modificationTime);
    }

    function fail(error) {
        alert(error.code);
    }

    // Request the metadata object for this entry
    entry.getMetadata(success, fail);

setMetadata
----------------

Set metadata on a file.

__Currently works only on iOS.__
- this will set the extended attributes of a file.

__Parameters:__

- __successCallback__: A callback that executes when the metadata is set. _(Function)_
- __errorCallback__: A callback that executes when the metadata is not successfully set. _(Function)_
- __metadataObject__: An object that contains the metadata's keys and values. _(Object)_

__Quick Example__

    function success() {
        console.log("The metadata was successfully set.");
    }

    function fail() {
        alert("There was an error in setting the metadata");
    }

    // Set the metadata
    entry.setMetadata(success, fail, { "com.apple.MobileBackup": 1});

__iOS Quirk__

- Only the `com.apple.MobileBackup` extended attribute is supported. Set the value to `1` to prevent the file from being backed up to iCloud. Set the value to `0` to re-enable the file to be backed up to iCloud.

__Quick Example__

    function setFileMetadata(localFileSystem, filePath, metadataKey, metadataValue)
    {
            var onSetMetadataWin = function() {
              console.log("success setting metadata")
            }
        var onSetMetadataFail = function() {
              console.log("error setting metadata")
        }

            var onGetFileWin = function(parent) {
              var data = {};
              data[metadataKey] = metadataValue;
              parent.setMetadata(onSetMetadataWin, onSetMetadataFail, data);
            }
            var onGetFileFail = function() {
              console.log("error getting file")
            }

            var onFSWin = function(fileSystem) {
              fileSystem.root.getFile(filePath, {create: true, exclusive: false}, onGetFileWin, onGetFileFail);
            }

            var onFSFail = function(evt) {
                  console.log(evt.target.error.code);
            }

            window.requestFileSystem(localFileSystem, 0, onFSWin, onFSFail);
    }

        setFileMetadata(LocalFileSystem.PERSISTENT, "Backups/sqlite.db", "com.apple.MobileBackup", 1);

moveTo
------

Move a file to a different location on the file system. An error
results if the app attempts to:

- move a file into its parent if a name different from its current one isn't provided;
- move a file to a path occupied by a directory;

In addition, moving a file on top of an existing file attempts to
delete and replace that file.

__Parameters:__

- __parent__: The parent directory to which to move the file. _(DirectoryEntry)_
- __newName__: The new name of the file. Defaults to the current name if unspecified. _(DOMString)_
- __successCallback__: A callback that is passed the new files `FileEntry` object. _(Function)_
- __errorCallback__: A callback that executes if an error occurs when attempting to move the file.  Invoked with a `FileError` object. _(Function)_

__Quick Example__

    function success(entry) {
        console.log("New Path: " + entry.fullPath);
    }

    function fail(error) {
        alert(error.code);
    }

    function moveFile(entry) {
        var parent = document.getElementById('parent').value,
            parentName = parent.substring(parent.lastIndexOf('/')+1),
            parentEntry = new DirectoryEntry(parentName, parent);

        // move the file to a new directory and rename it
        entry.moveTo(parentEntry, "newFile.txt", success, fail);
    }

copyTo
------

Copy a file to a new location on the file system.  An error results if
the app attempts to:

- copy a file into its parent if a name different from its current one is not provided.

__Parameters:__

- __parent__: The parent directory to which to copy the file. _(DirectoryEntry)_
- __newName__: The new name of the file. Defaults to the current name if unspecified. _(DOMString)_
- __successCallback__: A callback that is passed the new file's `FileEntry` object. _(Function)_
- __errorCallback__: A callback that executes if an error occurs when attempting to copy the file.  Invoked with a `FileError` object. _(Function)_

__Quick Example__

    function win(entry) {
        console.log("New Path: " + entry.fullPath);
    }

    function fail(error) {
        alert(error.code);
    }

    function copyFile(entry) {
        var parent = document.getElementById('parent').value,
            parentName = parent.substring(parent.lastIndexOf('/')+1),
            parentEntry = new DirectoryEntry(parentName, parent);

        // copy the file to a new directory and rename it
        entry.copyTo(parentEntry, "file.copy", success, fail);
    }

toURL
-----

Returns a URL that can be used to locate the file.

__Quick Example__

    // Request the URL for this entry
    var fileURL = entry.toURL();
    console.log(fileURL);

remove
------

Deletes a file.

__Parameters:__

- __successCallback__: A callback that executes after the file has been deleted.  Invoked with no parameters. _(Function)_
- __errorCallback__: A callback that executes if an error occurs when attempting to delete the file.  Invoked with a `FileError` object. _(Function)_

__Quick Example__

    function success(entry) {
        console.log("Removal succeeded");
    }

    function fail(error) {
        alert('Error removing file: ' + error.code);
    }

    // remove the file
    entry.remove(success, fail);

getParent
---------

Look up the parent `DirectoryEntry` containing the file.

__Parameters:__

- __successCallback__: A callback that is passed the file's parent `DirectoryEntry`. _(Function)_
- __errorCallback__: A callback that executes if an error occurs when attempting to retrieve the parent `DirectoryEntry`.  Invoked with a `FileError` object. _(Function)_

__Quick Example__

    function success(parent) {
        console.log("Parent Name: " + parent.name);
    }

    function fail(error) {
        alert(error.code);
    }

    // Get the parent DirectoryEntry
    entry.getParent(success, fail);

createWriter
------------

Create a `FileWriter` object associated with the file represented by the `FileEntry`.

__Parameters:__

- __successCallback__: A callback that is passed a `FileWriter` object. _(Function)_
- __errorCallback__: A callback that executes if an error occurs while attempting to create the FileWriter.  Invoked with a `FileError` object. _(Function)_

__Quick Example__

    function success(writer) {
        writer.write("Some text to the file");
    }

    function fail(error) {
        alert(error.code);
    }

    // create a FileWriter to write to the file
    entry.createWriter(success, fail);

file
----

Return a `File` object that represents the current state of the file
that this `FileEntry` represents.

__Parameters:__

- __successCallback__: A callback that is passed a `File` object. _(Function)_
- __errorCallback__: A callback that executes if an error occurs when creating the `File` object, such as when the file no longer exists.  Invoked with a `FileError` object. _(Function)_

__Quick Example__

    function success(file) {
        console.log("File size: " + file.size);
    }

    function fail(error) {
        alert("Unable to retrieve file properties: " + error.code);
    }

    // obtain properties of a file
    entry.file(success, fail);