gecko-dev/xpcom/io/nsIFastLoadFileControl.idl

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla FastLoad code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 2001 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Brendan Eich <brendan@mozilla.org> (original author)
*/
#include "nsISupports.idl"
#include "nsrootidl.idl"
interface nsIFile;
interface nsISimpleEnumerator;
/**
* The nsIFastLoadFileControl interface and its subinterfaces are mix-ins for
* classes implementing nsIObjectInputStream and nsIObjectOutputStream, so that
* those stream types can be used with nsIFastLoadService to access and compute
* FastLoad file checksums, update and check FastLoad file dependencies, and
* multiplex documents loaded via non-blocking i/o.
*
* If an nsIObjectInputStream class doesn't support nsIFastLoadReadControl, or
* an nsIObjectOutputStream class doesn't support nsIFastLoadWriteControl, that
* implementation may still be useful for object serialization, but it can't be
* used to read or write a Mozilla FastLoad file.
*/
[scriptable, uuid(8a1e2c63-af50-4147-af7e-26289dc180dd)]
interface nsIFastLoadFileControl : nsISupports
{
/**
* Get and set the recorded checksum value from the FastLoad file header.
*/
attribute PRUint32 checksum;
/**
* Multiplexed document control methods. A FastLoad file may contain
* multiple interleaved documents identified by a URI specifier string,
* and indexed for fast multiplexor select by an opaque URI object key.
* You StartMuxedDocument when initiating a document load, then Select
* before every batch of calls to (de)serialize document data, and End
* when the load completes.
*
* Document multiplexing is necessary to support incremental FastLoad
* development in a non-blocking i/o architecture such as Mozilla, where
* some (but not all, at first, or for a while during development) of the
* results of parsing and compiling various inputs can be multiplexed to
* or from a FastLoad file.
*/
void startMuxedDocument(in nsISupports aURI, in string aURISpec);
void selectMuxedDocument(in nsISupports aURI);
void endMuxedDocument(in nsISupports aURI);
};
[scriptable, uuid(652ecec6-d40b-45b6-afef-641d6c63a35b)]
interface nsIFastLoadReadControl : nsIFastLoadFileControl
{
/**
* Computes the correct checksum of the FastLoad file, independent of the
* header's checksum value. The header checksum field is treated as zero
* when computing the checksum.
*/
PRUint32 computeChecksum();
/**
* Get the collection of dependency nsIFile instances recorded during the
* FastLoad file write or read/update process, and checked during the read
* process to invalidate the FastLoad file if any dependencies are newer.
*/
readonly attribute nsISimpleEnumerator dependencies;
};
[scriptable, uuid(2ad6e9e6-1379-4e45-a899-a54b27ff915c)]
interface nsIFastLoadWriteControl : nsIFastLoadFileControl
{
/**
* Add a file dependency of the FastLoad file (e.g., a .jar file) to the
* set of dependencies that trigger regeneration if any dependency has a
* last-modified-time greater than the FastLoad file's mtime.
*/
void addDependency(in nsIFile aFile);
};