EDOBE XDOM TAKE 6 IR - PRODUCTSHEET Especificaciones descargar pdf (Pagina 39)

File System Access

Adobe ExtendScript defines classes that simplify cross-platform file-system access. These classes are

available to all applications that support a JavaScript interface.

X The first part of this chapter, Using File and Folder objects, describes how to use these classes and

provides details of pathname syntax.

X “File object” on page 47 and “Folder object” on page 56 provide reference details of the objects,

properties, methods, and creation parameters. You can also choose the Core JavaScript Classes

dictionary from the Help menu in the ExtendScript Toolkit to inspect the objects in the Object Model

Viewer.

Using File and Folder objects

Because path name syntax is very different on Windows, Mac OS, and UNIX

, Adobe ExendScript defines

the

File and Folder objects to provide platform-independent access to the underlying file system. A

File object represents a disk file, a Folder object represents a directory or folder.

X The Folder object supports file system functionality such as traversing the hierarchy; creating,

renaming or removing files; or resolving file aliases.

X The File object supports input/output functions to read or write files.

There are several ways to distinguish between a

File and a Folder object. For example:

if (f instanceof File) ...

if (typeof f.open == "undefined") ...// Folders do not open

File

and Folder objects can be used anywhere that a path name is required, such as in properties and

arguments for files and folders.

OTE: When you create two File objects that refer to the same disk file, they are treated as distinct

objects. If you open one of them for I/O, the operating system may inhibit access from the other object,

because the disk file already is open.

Specifying paths

When creating a File or Folder object, you can specify a platform-specific path name, or an absolute or

relative path in a platform-independent format known as universal resource identifier (URI) notation. The

path stored in the object is always an absolute, full path name that points to a fixed location on the disk.

X Use the toString method to obtain the name of the file or folder as string containing an absolute

path name in URI notation.

X Use the fsName property to obtain the platform-specific file name.

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EDOBE XDOM TAKE 6 IR - PRODUCTSHEET Especificaciones Pagina 39