1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/rdf/util/src/nsRDFResource.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,221 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsRDFResource.h"
1.10 +#include "nsIServiceManager.h"
1.11 +#include "nsIRDFDelegateFactory.h"
1.12 +#include "nsIRDFService.h"
1.13 +#include "nsRDFCID.h"
1.14 +#include "prlog.h"
1.15 +#include "nsComponentManagerUtils.h"
1.16 +#include "nsServiceManagerUtils.h"
1.17 +
1.18 +static NS_DEFINE_CID(kRDFServiceCID, NS_RDFSERVICE_CID);
1.19 +
1.20 +nsIRDFService* nsRDFResource::gRDFService = nullptr;
1.21 +nsrefcnt nsRDFResource::gRDFServiceRefCnt = 0;
1.22 +
1.23 +////////////////////////////////////////////////////////////////////////////////
1.24 +
1.25 +nsRDFResource::nsRDFResource(void)
1.26 + : mDelegates(nullptr)
1.27 +{
1.28 +}
1.29 +
1.30 +nsRDFResource::~nsRDFResource(void)
1.31 +{
1.32 + // Release all of the delegate objects
1.33 + while (mDelegates) {
1.34 + DelegateEntry* doomed = mDelegates;
1.35 + mDelegates = mDelegates->mNext;
1.36 + delete doomed;
1.37 + }
1.38 +
1.39 + if (!gRDFService)
1.40 + return;
1.41 +
1.42 + gRDFService->UnregisterResource(this);
1.43 +
1.44 + if (--gRDFServiceRefCnt == 0)
1.45 + NS_RELEASE(gRDFService);
1.46 +}
1.47 +
1.48 +NS_IMPL_ISUPPORTS(nsRDFResource, nsIRDFResource, nsIRDFNode)
1.49 +
1.50 +////////////////////////////////////////////////////////////////////////////////
1.51 +// nsIRDFNode methods:
1.52 +
1.53 +NS_IMETHODIMP
1.54 +nsRDFResource::EqualsNode(nsIRDFNode* aNode, bool* aResult)
1.55 +{
1.56 + NS_PRECONDITION(aNode != nullptr, "null ptr");
1.57 + if (! aNode)
1.58 + return NS_ERROR_NULL_POINTER;
1.59 +
1.60 + nsresult rv;
1.61 + nsIRDFResource* resource;
1.62 + rv = aNode->QueryInterface(NS_GET_IID(nsIRDFResource), (void**)&resource);
1.63 + if (NS_SUCCEEDED(rv)) {
1.64 + *aResult = (static_cast<nsIRDFResource*>(this) == resource);
1.65 + NS_RELEASE(resource);
1.66 + return NS_OK;
1.67 + }
1.68 + else if (rv == NS_NOINTERFACE) {
1.69 + *aResult = false;
1.70 + return NS_OK;
1.71 + }
1.72 + else {
1.73 + return rv;
1.74 + }
1.75 +}
1.76 +
1.77 +////////////////////////////////////////////////////////////////////////////////
1.78 +// nsIRDFResource methods:
1.79 +
1.80 +NS_IMETHODIMP
1.81 +nsRDFResource::Init(const char* aURI)
1.82 +{
1.83 + NS_PRECONDITION(aURI != nullptr, "null ptr");
1.84 + if (! aURI)
1.85 + return NS_ERROR_NULL_POINTER;
1.86 +
1.87 + mURI = aURI;
1.88 +
1.89 + if (gRDFServiceRefCnt++ == 0) {
1.90 + nsresult rv = CallGetService(kRDFServiceCID, &gRDFService);
1.91 + if (NS_FAILED(rv)) return rv;
1.92 + }
1.93 +
1.94 + // don't replace an existing resource with the same URI automatically
1.95 + return gRDFService->RegisterResource(this, true);
1.96 +}
1.97 +
1.98 +NS_IMETHODIMP
1.99 +nsRDFResource::GetValue(char* *aURI)
1.100 +{
1.101 + NS_ASSERTION(aURI, "Null out param.");
1.102 +
1.103 + *aURI = ToNewCString(mURI);
1.104 +
1.105 + if (!*aURI)
1.106 + return NS_ERROR_OUT_OF_MEMORY;
1.107 +
1.108 + return NS_OK;
1.109 +}
1.110 +
1.111 +NS_IMETHODIMP
1.112 +nsRDFResource::GetValueUTF8(nsACString& aResult)
1.113 +{
1.114 + aResult = mURI;
1.115 + return NS_OK;
1.116 +}
1.117 +
1.118 +NS_IMETHODIMP
1.119 +nsRDFResource::GetValueConst(const char** aURI)
1.120 +{
1.121 + *aURI = mURI.get();
1.122 + return NS_OK;
1.123 +}
1.124 +
1.125 +NS_IMETHODIMP
1.126 +nsRDFResource::EqualsString(const char* aURI, bool* aResult)
1.127 +{
1.128 + NS_PRECONDITION(aURI != nullptr, "null ptr");
1.129 + if (! aURI)
1.130 + return NS_ERROR_NULL_POINTER;
1.131 +
1.132 + NS_PRECONDITION(aResult, "null ptr");
1.133 +
1.134 + *aResult = mURI.Equals(aURI);
1.135 + return NS_OK;
1.136 +}
1.137 +
1.138 +NS_IMETHODIMP
1.139 +nsRDFResource::GetDelegate(const char* aKey, REFNSIID aIID, void** aResult)
1.140 +{
1.141 + NS_PRECONDITION(aKey != nullptr, "null ptr");
1.142 + if (! aKey)
1.143 + return NS_ERROR_NULL_POINTER;
1.144 +
1.145 + nsresult rv;
1.146 + *aResult = nullptr;
1.147 +
1.148 + DelegateEntry* entry = mDelegates;
1.149 + while (entry) {
1.150 + if (entry->mKey.Equals(aKey)) {
1.151 + rv = entry->mDelegate->QueryInterface(aIID, aResult);
1.152 + return rv;
1.153 + }
1.154 +
1.155 + entry = entry->mNext;
1.156 + }
1.157 +
1.158 + // Construct a ContractID of the form "@mozilla.org/rdf/delegate/[key]/[scheme];1
1.159 + nsAutoCString contractID(NS_RDF_DELEGATEFACTORY_CONTRACTID_PREFIX);
1.160 + contractID.Append(aKey);
1.161 + contractID.Append("&scheme=");
1.162 +
1.163 + int32_t i = mURI.FindChar(':');
1.164 + contractID += StringHead(mURI, i);
1.165 +
1.166 + nsCOMPtr<nsIRDFDelegateFactory> delegateFactory =
1.167 + do_CreateInstance(contractID.get(), &rv);
1.168 + if (NS_FAILED(rv)) return rv;
1.169 +
1.170 + rv = delegateFactory->CreateDelegate(this, aKey, aIID, aResult);
1.171 + if (NS_FAILED(rv)) return rv;
1.172 +
1.173 + // Okay, we've successfully created a delegate. Let's remember it.
1.174 + entry = new DelegateEntry;
1.175 + if (! entry) {
1.176 + NS_RELEASE(*reinterpret_cast<nsISupports**>(aResult));
1.177 + return NS_ERROR_OUT_OF_MEMORY;
1.178 + }
1.179 +
1.180 + entry->mKey = aKey;
1.181 + entry->mDelegate = do_QueryInterface(*reinterpret_cast<nsISupports**>(aResult), &rv);
1.182 + if (NS_FAILED(rv)) {
1.183 + NS_ERROR("nsRDFResource::GetDelegate(): can't QI to nsISupports!");
1.184 +
1.185 + delete entry;
1.186 + NS_RELEASE(*reinterpret_cast<nsISupports**>(aResult));
1.187 + return NS_ERROR_FAILURE;
1.188 + }
1.189 +
1.190 + entry->mNext = mDelegates;
1.191 +
1.192 + mDelegates = entry;
1.193 +
1.194 + return NS_OK;
1.195 +}
1.196 +
1.197 +NS_IMETHODIMP
1.198 +nsRDFResource::ReleaseDelegate(const char* aKey)
1.199 +{
1.200 + NS_PRECONDITION(aKey != nullptr, "null ptr");
1.201 + if (! aKey)
1.202 + return NS_ERROR_NULL_POINTER;
1.203 +
1.204 + DelegateEntry* entry = mDelegates;
1.205 + DelegateEntry** link = &mDelegates;
1.206 +
1.207 + while (entry) {
1.208 + if (entry->mKey.Equals(aKey)) {
1.209 + *link = entry->mNext;
1.210 + delete entry;
1.211 + return NS_OK;
1.212 + }
1.213 +
1.214 + link = &(entry->mNext);
1.215 + entry = entry->mNext;
1.216 + }
1.217 +
1.218 + NS_WARNING("nsRDFResource::ReleaseDelegate() no delegate found");
1.219 + return NS_OK;
1.220 +}
1.221 +
1.222 +
1.223 +
1.224 +////////////////////////////////////////////////////////////////////////////////
