gecko-dev/rdf/tests/rdfcat/rdfcat.cpp

190 строки
6.0 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
* Chase Tingley <tingley@sundell.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
A simple test program that reads in RDF/XML into an in-memory data
source, then uses the RDF/XML serialization API to write an
equivalent (but not identical) RDF/XML file back to stdout.
The program takes a single parameter: the URL from which to read.
*/
#include <stdio.h>
#include "nsXPCOM.h"
#include "nsCOMPtr.h"
#include "nsIComponentManager.h"
#include "nsComponentManagerUtils.h"
#include "nsServiceManagerUtils.h"
#include "nsIIOService.h"
#include "nsIInputStream.h"
#include "nsIOutputStream.h"
#include "nsIRDFCompositeDataSource.h"
#include "nsIRDFNode.h"
#include "nsIRDFRemoteDataSource.h"
#include "nsIRDFService.h"
#include "nsIRDFXMLSource.h"
#include "nsIServiceManager.h"
#include "nsIStreamListener.h"
#include "nsIURL.h"
#include "nsRDFCID.h"
#include "nsThreadUtils.h"
#include "plstr.h"
#include "prio.h"
#include "prthread.h"
////////////////////////////////////////////////////////////////////////
// CIDs
// rdf
static NS_DEFINE_CID(kRDFXMLDataSourceCID, NS_RDFXMLDATASOURCE_CID);
////////////////////////////////////////////////////////////////////////
// Blatantly stolen from netwerk/test/
#define RETURN_IF_FAILED(rv, step) \
PR_BEGIN_MACRO \
if (NS_FAILED(rv)) { \
printf(">>> %s failed: rv=%x\n", step, rv); \
return rv;\
} \
PR_END_MACRO
////////////////////////////////////////////////////////////////////////
class ConsoleOutputStreamImpl : public nsIOutputStream
{
public:
ConsoleOutputStreamImpl(void) {}
virtual ~ConsoleOutputStreamImpl(void) {}
// nsISupports interface
NS_DECL_ISUPPORTS
// nsIBaseStream interface
NS_IMETHOD Close(void) {
return NS_OK;
}
// nsIOutputStream interface
NS_IMETHOD Write(const char* aBuf, PRUint32 aCount, PRUint32 *aWriteCount) {
PR_Write(PR_GetSpecialFD(PR_StandardOutput), aBuf, aCount);
*aWriteCount = aCount;
return NS_OK;
}
NS_IMETHOD
WriteFrom(nsIInputStream *inStr, PRUint32 count, PRUint32 *_retval) {
NS_NOTREACHED("WriteFrom");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHOD
WriteSegments(nsReadSegmentFun reader, void * closure, PRUint32 count, PRUint32 *_retval) {
NS_NOTREACHED("WriteSegments");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHOD
IsNonBlocking(PRBool *aNonBlocking) {
NS_NOTREACHED("IsNonBlocking");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHOD Flush(void) {
PR_Sync(PR_GetSpecialFD(PR_StandardOutput));
return NS_OK;
}
};
NS_IMPL_ISUPPORTS1(ConsoleOutputStreamImpl, nsIOutputStream)
////////////////////////////////////////////////////////////////////////
int
main(int argc, char** argv)
{
nsresult rv;
if (argc < 2) {
fprintf(stderr, "usage: %s <url>\n", argv[0]);
return 1;
}
NS_InitXPCOM2(nsnull, nsnull, nsnull);
// Create a stream data source and initialize it on argv[1], which
// is hopefully a "file:" URL.
nsCOMPtr<nsIRDFDataSource> ds = do_CreateInstance(kRDFXMLDataSourceCID,
&rv);
RETURN_IF_FAILED(rv, "RDF/XML datasource creation");
nsCOMPtr<nsIRDFRemoteDataSource> remote = do_QueryInterface(ds, &rv);
RETURN_IF_FAILED(rv, "QI to nsIRDFRemoteDataSource");
rv = remote->Init(argv[1]);
RETURN_IF_FAILED(rv, "datasource initialization");
// Okay, this should load the XML file...
rv = remote->Refresh(PR_FALSE);
RETURN_IF_FAILED(rv, "datasource refresh");
// Pump events until the load is finished
nsCOMPtr<nsIThread> thread = do_GetCurrentThread();
PRBool done = PR_FALSE;
while (!done) {
NS_ENSURE_STATE(NS_ProcessNextEvent(thread));
remote->GetLoaded(&done);
}
// And this should write it back out. The do_QI() on the pointer
// is a hack to make sure that the new object gets AddRef()-ed.
nsCOMPtr<nsIOutputStream> out =
do_QueryInterface(new ConsoleOutputStreamImpl, &rv);
RETURN_IF_FAILED(rv, "creation of console output stream");
nsCOMPtr<nsIRDFXMLSource> source = do_QueryInterface(ds);
RETURN_IF_FAILED(rv, "QI to nsIRDFXMLSource");
rv = source->Serialize(out);
RETURN_IF_FAILED(rv, "datasoure serialization");
return NS_OK;
}