/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #include "nsRDFResource.h" #include "nsIServiceManager.h" #include "nsIRDFDelegateFactory.h" #include "nsIRDFService.h" #include "nsRDFCID.h" #include "mozilla/Logging.h" #include "nsComponentManagerUtils.h" #include "nsServiceManagerUtils.h" static NS_DEFINE_CID(kRDFServiceCID, NS_RDFSERVICE_CID); nsIRDFService* nsRDFResource::gRDFService = nullptr; nsrefcnt nsRDFResource::gRDFServiceRefCnt = 0; //////////////////////////////////////////////////////////////////////////////// nsRDFResource::nsRDFResource(void) : mDelegates(nullptr) { } nsRDFResource::~nsRDFResource(void) { // Release all of the delegate objects while (mDelegates) { DelegateEntry* doomed = mDelegates; mDelegates = mDelegates->mNext; delete doomed; } if (!gRDFService) return; gRDFService->UnregisterResource(this); if (--gRDFServiceRefCnt == 0) NS_RELEASE(gRDFService); } NS_IMPL_ISUPPORTS(nsRDFResource, nsIRDFResource, nsIRDFNode) //////////////////////////////////////////////////////////////////////////////// // nsIRDFNode methods: NS_IMETHODIMP nsRDFResource::EqualsNode(nsIRDFNode* aNode, bool* aResult) { NS_PRECONDITION(aNode != nullptr, "null ptr"); if (! aNode) return NS_ERROR_NULL_POINTER; nsresult rv; nsIRDFResource* resource; rv = aNode->QueryInterface(NS_GET_IID(nsIRDFResource), (void**)&resource); if (NS_SUCCEEDED(rv)) { *aResult = (static_cast<nsIRDFResource*>(this) == resource); NS_RELEASE(resource); return NS_OK; } else if (rv == NS_NOINTERFACE) { *aResult = false; return NS_OK; } else { return rv; } } //////////////////////////////////////////////////////////////////////////////// // nsIRDFResource methods: NS_IMETHODIMP nsRDFResource::Init(const char* aURI) { NS_PRECONDITION(aURI != nullptr, "null ptr"); if (! aURI) return NS_ERROR_NULL_POINTER; mURI = aURI; if (gRDFServiceRefCnt++ == 0) { nsresult rv = CallGetService(kRDFServiceCID, &gRDFService); if (NS_FAILED(rv)) return rv; } // don't replace an existing resource with the same URI automatically return gRDFService->RegisterResource(this, true); } NS_IMETHODIMP nsRDFResource::GetValue(char* *aURI) { NS_ASSERTION(aURI, "Null out param."); *aURI = ToNewCString(mURI); if (!*aURI) return NS_ERROR_OUT_OF_MEMORY; return NS_OK; } NS_IMETHODIMP nsRDFResource::GetValueUTF8(nsACString& aResult) { aResult = mURI; return NS_OK; } NS_IMETHODIMP nsRDFResource::GetValueConst(const char** aURI) { *aURI = mURI.get(); return NS_OK; } NS_IMETHODIMP nsRDFResource::EqualsString(const char* aURI, bool* aResult) { NS_PRECONDITION(aURI != nullptr, "null ptr"); if (! aURI) return NS_ERROR_NULL_POINTER; NS_PRECONDITION(aResult, "null ptr"); *aResult = mURI.Equals(aURI); return NS_OK; } NS_IMETHODIMP nsRDFResource::GetDelegate(const char* aKey, REFNSIID aIID, void** aResult) { NS_PRECONDITION(aKey != nullptr, "null ptr"); if (! aKey) return NS_ERROR_NULL_POINTER; nsresult rv; *aResult = nullptr; DelegateEntry* entry = mDelegates; while (entry) { if (entry->mKey.Equals(aKey)) { rv = entry->mDelegate->QueryInterface(aIID, aResult); return rv; } entry = entry->mNext; } // Construct a ContractID of the form "@mozilla.org/rdf/delegate/[key]/[scheme];1 nsAutoCString contractID(NS_RDF_DELEGATEFACTORY_CONTRACTID_PREFIX); contractID.Append(aKey); contractID.AppendLiteral("&scheme="); int32_t i = mURI.FindChar(':'); contractID += StringHead(mURI, i); nsCOMPtr<nsIRDFDelegateFactory> delegateFactory = do_CreateInstance(contractID.get(), &rv); if (NS_FAILED(rv)) return rv; rv = delegateFactory->CreateDelegate(this, aKey, aIID, aResult); if (NS_FAILED(rv)) return rv; // Okay, we've successfully created a delegate. Let's remember it. entry = new DelegateEntry; if (! entry) { NS_RELEASE(*reinterpret_cast<nsISupports**>(aResult)); return NS_ERROR_OUT_OF_MEMORY; } entry->mKey = aKey; entry->mDelegate = do_QueryInterface(*reinterpret_cast<nsISupports**>(aResult), &rv); if (NS_FAILED(rv)) { NS_ERROR("nsRDFResource::GetDelegate(): can't QI to nsISupports!"); delete entry; NS_RELEASE(*reinterpret_cast<nsISupports**>(aResult)); return NS_ERROR_FAILURE; } entry->mNext = mDelegates; mDelegates = entry; return NS_OK; } NS_IMETHODIMP nsRDFResource::ReleaseDelegate(const char* aKey) { NS_PRECONDITION(aKey != nullptr, "null ptr"); if (! aKey) return NS_ERROR_NULL_POINTER; DelegateEntry* entry = mDelegates; DelegateEntry** link = &mDelegates; while (entry) { if (entry->mKey.Equals(aKey)) { *link = entry->mNext; delete entry; return NS_OK; } link = &(entry->mNext); entry = entry->mNext; } NS_WARNING("nsRDFResource::ReleaseDelegate() no delegate found"); return NS_OK; } ////////////////////////////////////////////////////////////////////////////////