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lightning-sunbird  0.9+nobinonly
nsMsgRDFUtils.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1999
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either of the GNU General Public License Version 2 or later (the "GPL"),
00026  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
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00036  * ***** END LICENSE BLOCK ***** */
00037 #include "nsMsgRDFUtils.h"
00038 #include "nsIServiceManager.h"
00039 #include "prprf.h"
00040 #include "nsCOMPtr.h"
00041 #include "nsMemory.h"
00042 #include "nsReadableUtils.h"
00043 
00044 nsresult createNode(const PRUnichar *str, nsIRDFNode **node, nsIRDFService *rdfService)
00045 {
00046   nsresult rv;
00047   nsCOMPtr<nsIRDFLiteral> value;
00048 
00049   NS_ASSERTION(rdfService, "rdfService is null");
00050   if (!rdfService) return NS_OK;
00051 
00052   if (str) {
00053     rv = rdfService->GetLiteral(str, getter_AddRefs(value));
00054   } 
00055   else {
00056     rv = rdfService->GetLiteral(EmptyString().get(), getter_AddRefs(value));
00057   }
00058 
00059   if (NS_SUCCEEDED(rv)) {
00060     *node = value;
00061     NS_IF_ADDREF(*node);
00062   }
00063   return rv;
00064 }
00065 
00066 nsresult createIntNode(PRInt32 value, nsIRDFNode **node, nsIRDFService *rdfService)
00067 {
00068   *node = nsnull;
00069   nsresult rv; 
00070   if (!rdfService) return NS_ERROR_NULL_POINTER;  
00071   nsCOMPtr<nsIRDFInt> num;
00072   rv = rdfService->GetIntLiteral(value, getter_AddRefs(num));
00073   if(NS_SUCCEEDED(rv)) {
00074     *node = num;
00075     NS_IF_ADDREF(*node);
00076   }
00077   return rv;
00078 }
00079 
00080 nsresult createBlobNode(PRUint8 *value, PRUint32 &length, nsIRDFNode **node, nsIRDFService *rdfService)
00081 {
00082   NS_ENSURE_ARG_POINTER(node);
00083   NS_ENSURE_ARG_POINTER(rdfService);
00084   
00085   *node = nsnull;
00086   nsCOMPtr<nsIRDFBlob> blob;
00087   nsresult rv = rdfService->GetBlobLiteral(value, length, getter_AddRefs(blob));
00088   NS_ENSURE_SUCCESS(rv,rv);
00089   NS_IF_ADDREF(*node = blob);
00090   return rv;
00091 }
00092 
00093 nsresult GetTargetHasAssertion(nsIRDFDataSource *dataSource, nsIRDFResource* folderResource,
00094                                nsIRDFResource *property,PRBool tv, nsIRDFNode *target,PRBool* hasAssertion)
00095 {
00096   NS_ENSURE_ARG_POINTER(hasAssertion);
00097   
00098   nsCOMPtr<nsIRDFNode> currentTarget;
00099   
00100   nsresult rv = dataSource->GetTarget(folderResource, property,tv, getter_AddRefs(currentTarget));
00101   if(NS_SUCCEEDED(rv))
00102   {
00103     nsCOMPtr<nsIRDFLiteral> value1(do_QueryInterface(target));
00104     nsCOMPtr<nsIRDFLiteral> value2(do_QueryInterface(currentTarget));
00105     if(value1 && value2)
00106       //If the two values are equal then it has this assertion
00107       *hasAssertion = (value1 == value2);
00108   }
00109   else
00110     rv = NS_NOINTERFACE;
00111   
00112   return rv;
00113   
00114 }
00115