org.vectomatic.file

Class FileUtils

java.lang.Object

org.vectomatic.file.FileUtils

public class FileUtils
extends Object

Class to group miscellaneous file-related utility methods.

Author:

laaglu

Constructor Summary

Constructors

Constructor and Description
FileUtils()

Method Summary

Modifier and Type	Method and Description
static String	base64encode(String str) Returns a base64 encoding of the specified binary string
static String	createDataUrl(String type, String data) Returns a data url with the specified mime type and data.
static String	createObjectURL(Blob blob) Creates a new object URL, whose lifetime is tied to the document in the window on which it was created.
static void	revokeObjectURL(String url) Releases an existing object URL which was previously created by calling createObjectURL(org.vectomatic.file.Blob) .
static boolean	supportsFileAPI() Tests whether the browser support the W3C File API

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FileUtils

public FileUtils()

Method Detail

base64encode

public static String base64encode(String str)

Returns a base64 encoding of the specified binary string

Parameters:

str - A binary string (obtained for instance by the FileReader API).

Returns:

a base64 encoded string.

createDataUrl

public static String createDataUrl(String type,
                                   String data)

Returns a data url with the specified mime type and data.

Parameters:

type - The mime type to use in the data url.

data - A binary string (obtained for instance by the FileReader API)

Returns:

a base64 encoded string.

createObjectURL

public static final String createObjectURL(Blob blob)

Creates a new object URL, whose lifetime is tied to the document in the window on which it was created. The new object URL represents the specified Blob object.

Parameters:

blob - the blob to represent

Returns:

a new object URL representing the blob.

revokeObjectURL

public static final void revokeObjectURL(String url)

Releases an existing object URL which was previously created by calling createObjectURL(org.vectomatic.file.Blob) . Call this method when you've finished using a object URL, in order to let the browser know it doesn't need to keep the reference to the file any longer.

Parameters:

url - a string representing the object URL that was created by calling createObjectURL(org.vectomatic.file.Blob)

supportsFileAPI

public static final boolean supportsFileAPI()

Tests whether the browser support the W3C File API

Returns:

true is supported, false otherwise