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

177 lines
5.0 KiB
C++

/* -*- 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 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
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 "nsCOMPtr.h"
#include "nsIComponentManager.h"
#include "nsIEventQueueService.h"
#include "nsIGenericFactory.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 "plevent.h"
#include "plstr.h"
#include "prio.h"
#include "prthread.h"
////////////////////////////////////////////////////////////////////////
// CIDs
// rdf
static NS_DEFINE_CID(kRDFServiceCID, NS_RDFSERVICE_CID);
static NS_DEFINE_CID(kRDFXMLDataSourceCID, NS_RDFXMLDATASOURCE_CID);
// xpcom
static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
static NS_DEFINE_CID(kGenericFactoryCID, NS_GENERICFACTORY_CID);
////////////////////////////////////////////////////////////////////////
// To get the registry initialized!
#include "../../../webshell/tests/viewer/nsSetupRegistry.cpp"
////////////////////////////////////////////////////////////////////////
class ConsoleOutputStreamImpl : public nsIOutputStream
{
public:
ConsoleOutputStreamImpl(void) { NS_INIT_REFCNT(); }
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 Flush(void) {
PR_Sync(PR_GetSpecialFD(PR_StandardOutput));
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(ConsoleOutputStreamImpl, nsCOMTypeInfo<nsIOutputStream>::GetIID());
////////////////////////////////////////////////////////////////////////
int
main(int argc, char** argv)
{
nsresult rv;
if (argc < 2) {
fprintf(stderr, "usage: %s <url> [<poll-interval>]\n", argv[0]);
return 1;
}
NS_SetupRegistry();
// Get netlib off the floor...
NS_WITH_SERVICE(nsIEventQueueService, theEventQueueService, kEventQueueServiceCID, &rv);
if (NS_FAILED(rv)) return rv;
rv = theEventQueueService->CreateThreadEventQueue();
if (NS_FAILED(rv)) {
fprintf(stderr, "unable to create thread event queue\n");
return rv;
}
// Create a stream data source and initialize it on argv[1], which
// is hopefully a "file:" URL.
nsCOMPtr<nsIRDFDataSource> ds;
rv = nsComponentManager::CreateInstance(kRDFXMLDataSourceCID,
nsnull,
nsIRDFDataSource::GetIID(),
getter_AddRefs(ds));
if (NS_FAILED(rv)) {
fprintf(stderr, "unable to create RDF/XML data source\n");
return rv;
}
nsCOMPtr<nsIRDFRemoteDataSource> remote
= do_QueryInterface(ds);
if (! remote)
return NS_ERROR_UNEXPECTED;
rv = remote->Init(argv[1]);
if (NS_FAILED(rv)) {
fprintf(stderr, "unable to initialize data source\n");
return rv;
}
// Okay, this should load the XML file...
rv = remote->Refresh(PR_TRUE);
if (NS_FAILED(rv)) {
fprintf(stderr, "unable to open file\n");
return rv;
}
// 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);
if (! out) {
fprintf(stderr, "unable to create console output stream\n");
return NS_ERROR_OUT_OF_MEMORY;
}
nsCOMPtr<nsIRDFXMLSource> source = do_QueryInterface(ds);
if (! source)
return NS_ERROR_UNEXPECTED;
rv = source->Serialize(out);
if (NS_FAILED(rv)) {
fprintf(stderr, "error serializing\n");
return rv;
}
return NS_OK;
}