pjs/rdf/tests/rdfcat/rdfcat.cpp

/* -*- 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 "nsIEventQueueService.h"
#include "nsIInputStream.h"
#include "nsINetService.h"
#include "nsINetService.h"
#include "nsIOutputStream.h"
#include "nsIGenericFactory.h"
#include "nsIPostToServer.h"
#include "nsIRDFCompositeDataSource.h"
#include "nsIRDFXMLDataSource.h"
#include "nsIRDFDocument.h"
#include "nsIRDFNode.h"
#include "nsIRDFService.h"
#include "nsIRDFXMLSource.h"
#include "nsIServiceManager.h"
#include "nsIStreamListener.h"
#include "nsIURL.h"
#include "nsDOMCID.h"    // for NS_SCRIPT_NAMESET_REGISTRY_CID
#include "nsLayoutCID.h" // for NS_NAMESPACEMANAGER_CID
#include "nsParserCIID.h"
#include "nsRDFCID.h"
#include "nsRDFCID.h"
#include "nsIComponentManager.h"
#include "nsXPComCIID.h"
#include "prthread.h"
#include "plevent.h"
#include "plstr.h"

#if defined(XP_PC)
#define DOM_DLL    "jsdom.dll"
#define LAYOUT_DLL "raptorhtml.dll"
#define NETLIB_DLL "netlib.dll"
#define PARSER_DLL "raptorhtmlpars.dll"
#define RDF_DLL    "rdf.dll"
#define XPCOM_DLL  "xpcom32.dll"
#elif defined(XP_UNIX)
#define DOM_DLL    "libjsdom.so"
#define LAYOUT_DLL "libraptorhtml.so"
#define NETLIB_DLL "libnetlib.so"
#define PARSER_DLL "libraptorhtmlpars.so"
#define RDF_DLL    "librdf.so"
#define XPCOM_DLL  "libxpcom.so"
#elif defined(XP_MAC)
#define DOM_DLL    "DOM_DLL"
#define LAYOUT_DLL "LAYOUT_DLL"
#define NETLIB_DLL "NETLIB_DLL"
#define PARSER_DLL "PARSER_DLL"
#define RDF_DLL    "RDF_DLL"
#define XPCOM_DLL  "XPCOM_DLL"
#endif


////////////////////////////////////////////////////////////////////////
// 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);

////////////////////////////////////////////////////////////////////////
// IIDs

NS_DEFINE_IID(kIEventQueueServiceIID,  NS_IEVENTQUEUESERVICE_IID);
NS_DEFINE_IID(kIOutputStreamIID,       NS_IOUTPUTSTREAM_IID);
NS_DEFINE_IID(kIRDFXMLDataSourceIID,   NS_IRDFXMLDATASOURCE_IID);
NS_DEFINE_IID(kIRDFServiceIID,         NS_IRDFSERVICE_IID);
NS_DEFINE_IID(kIRDFXMLSourceIID,       NS_IRDFXMLSOURCE_IID);

#include "nsIAllocator.h" // for the CID

static nsresult
SetupRegistry(void)
{
    // netlib
    static NS_DEFINE_CID(kNetServiceCID,            NS_NETSERVICE_CID);

    nsComponentManager::RegisterComponent(kNetServiceCID,            NULL, NULL, NETLIB_DLL, PR_FALSE, PR_FALSE);

    // parser
    static NS_DEFINE_CID(kParserCID,                NS_PARSER_IID);
    static NS_DEFINE_CID(kWellFormedDTDCID,         NS_WELLFORMEDDTD_CID);

    nsComponentManager::RegisterComponent(kParserCID,                NULL, NULL, PARSER_DLL, PR_FALSE, PR_FALSE);
    nsComponentManager::RegisterComponent(kWellFormedDTDCID,         NULL, NULL, PARSER_DLL, PR_FALSE, PR_FALSE);

    // layout
    static NS_DEFINE_CID(kNameSpaceManagerCID,      NS_NAMESPACEMANAGER_CID);

    nsComponentManager::RegisterComponent(kNameSpaceManagerCID,      NULL, NULL, LAYOUT_DLL, PR_FALSE, PR_FALSE);

    // xpcom
    static NS_DEFINE_CID(kAllocatorCID, NS_ALLOCATOR_CID);
    nsComponentManager::RegisterComponent(kEventQueueServiceCID,     NULL, NULL, XPCOM_DLL,  PR_FALSE, PR_FALSE);
    nsComponentManager::RegisterComponent(kGenericFactoryCID,        NULL, NULL, XPCOM_DLL,  PR_FALSE, PR_FALSE);
    nsComponentManager::RegisterComponent(kAllocatorCID,             NULL, NULL, XPCOM_DLL,  PR_FALSE, PR_FALSE);

    return NS_OK;
}


////////////////////////////////////////////////////////////////////////

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 Write(nsIInputStream* fromStream, PRUint32 *aWriteCount) {
        return NS_ERROR_NOT_IMPLEMENTED;
    }

    NS_IMETHOD Flush(void) {
        PR_Sync(PR_GetSpecialFD(PR_StandardOutput));
        return NS_OK;
    }
};

NS_IMPL_ISUPPORTS(ConsoleOutputStreamImpl, kIOutputStreamIID);


////////////////////////////////////////////////////////////////////////

int
main(int argc, char** argv)
{
    nsresult rv;

    if (argc < 2) {
        fprintf(stderr, "usage: %s <url> [<poll-interval>]\n", argv[0]);
        return 1;
    }

    SetupRegistry();

    // Get netlib off the floor...
    NS_WITH_SERVICE(nsIEventQueueService, theEventQueueService, kEventQueueServiceCID, &rv);
    if (NS_FAILED(rv)) return rv;

    rv = theEventQueueService->CreateThreadEventQueue();
    NS_ASSERTION(NS_SUCCEEDED(rv), "unable to create thread event queue");
    if (NS_FAILED(rv)) return rv;

    // Create a stream data source and initialize it on argv[1], which
    // is hopefully a "file:" URL. (Actually, we can do _any_ kind of
    // URL, but only a "file:" URL will be written back to disk.)
    nsCOMPtr<nsIRDFXMLDataSource> ds;
    rv = nsComponentManager::CreateInstance(kRDFXMLDataSourceCID,
                                            nsnull,
                                            kIRDFXMLDataSourceIID,
                                            getter_AddRefs(ds));

    NS_ASSERTION(NS_SUCCEEDED(rv), "unable to create RDF/XML data source");
    if (NS_FAILED(rv)) return rv;

    rv = ds->Init(argv[1]);
    NS_ASSERTION(NS_SUCCEEDED(rv), "unable to initialize data source");
    if (NS_FAILED(rv)) return rv;

    // Okay, this should load the XML file...
    rv = ds->Open(PR_TRUE);
    NS_ASSERTION(NS_SUCCEEDED(rv), "unable to open datasource");
    if (NS_FAILED(rv)) return rv;

    // And this should write it back out.
    nsCOMPtr<nsIOutputStream> out =
        do_QueryInterface(new ConsoleOutputStreamImpl());

    NS_ASSERTION(out, "unable to create console output stream");
    if (! out)
        return NS_ERROR_OUT_OF_MEMORY;

    nsCOMPtr<nsIRDFXMLSource> source = do_QueryInterface(ds);
    NS_ASSERTION(source, "unable to RDF/XML interface");
    if (! source)
        return NS_ERROR_UNEXPECTED;

    rv = source->Serialize(out);
    NS_ASSERTION(NS_SUCCEEDED(rv), "error serializing");
    if (NS_FAILED(rv)) return rv;

    return NS_OK;
}