mozilla
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pjs
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pjs/xpcom/components/nsGenericFactory.cpp

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11 KiB
C++
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/* -*- 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 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*/
// DO NOT COPY THIS CODE INTO YOUR SOURCE! USE NS_IMPL_NSGETMODULE()
#include "nsGenericFactory.h"
#include "nsCRT.h"
nsGenericFactory::nsGenericFactory(nsModuleComponentInfo *info)
: mInfo(info)
{
NS_INIT_ISUPPORTS();
if (mInfo && mInfo->mClassInfoGlobal)
*mInfo->mClassInfoGlobal = NS_STATIC_CAST(nsIClassInfo *, this);
}
nsGenericFactory::~nsGenericFactory()
{
if (mInfo) {
if (mInfo->mFactoryDestructor)
mInfo->mFactoryDestructor();
if (mInfo->mClassInfoGlobal)
*mInfo->mClassInfoGlobal = 0;
}
}
NS_IMPL_THREADSAFE_ISUPPORTS3(nsGenericFactory,
nsIGenericFactory,
nsIFactory,
nsIClassInfo)
NS_IMETHODIMP nsGenericFactory::CreateInstance(nsISupports *aOuter,
REFNSIID aIID, void **aResult)
{
return mInfo->mConstructor(aOuter, aIID, aResult);
}
NS_IMETHODIMP nsGenericFactory::LockFactory(PRBool aLock)
{
// XXX do we care if (mInfo->mFlags & THREADSAFE)?
return NS_OK;
}
NS_IMETHODIMP nsGenericFactory::GetInterfaces(PRUint32 *countp,
nsIID* **array)
{
if (!mInfo->mGetInterfacesProc) {
*countp = 0;
*array = nsnull;
return NS_OK;
}
return mInfo->mGetInterfacesProc(countp, array);
}
NS_IMETHODIMP nsGenericFactory::GetHelperForLanguage(PRUint32 language,
nsISupports **helper)
{
if (mInfo->mGetLanguageHelperProc)
return mInfo->mGetLanguageHelperProc(language, helper);
*helper = nsnull;
return NS_OK;
}
NS_IMETHODIMP nsGenericFactory::GetContractID(char **aContractID)
{
if (mInfo->mContractID) {
*aContractID = (char *)nsMemory::Alloc(strlen(mInfo->mContractID) + 1);
if (!*aContractID)
return NS_ERROR_OUT_OF_MEMORY;
strcpy(*aContractID, mInfo->mContractID);
} else {
*aContractID = nsnull;
}
return NS_OK;
}
NS_IMETHODIMP nsGenericFactory::GetClassID(nsCID **aClassID)
{
*aClassID = (nsCID *)nsMemory::Clone(&mInfo->mCID, sizeof(nsCID));
if (!*aClassID)
return NS_ERROR_OUT_OF_MEMORY;
return NS_OK;
}
NS_IMETHODIMP nsGenericFactory::GetImplementationLanguage(PRUint32 *langp)
{
*langp = nsIClassInfo::LANGUAGE_CPP;
return NS_OK;
}
NS_IMETHODIMP nsGenericFactory::GetFlags(PRUint32 *flagsp)
{
*flagsp = mInfo->mFlags;
return NS_OK;
}
// nsIGenericFactory: component-info accessors
NS_IMETHODIMP nsGenericFactory::SetComponentInfo(nsModuleComponentInfo *info)
{
if (mInfo && mInfo->mClassInfoGlobal)
*mInfo->mClassInfoGlobal = 0;
mInfo = info;
if (mInfo && mInfo->mClassInfoGlobal)
*mInfo->mClassInfoGlobal = NS_STATIC_CAST(nsIClassInfo *, this);
return NS_OK;
}
NS_IMETHODIMP nsGenericFactory::GetComponentInfo(nsModuleComponentInfo **infop)
{
*infop = mInfo;
return NS_OK;
}
NS_METHOD nsGenericFactory::Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr)
{
// sorry, aggregation not spoken here.
nsresult res = NS_ERROR_NO_AGGREGATION;
if (outer == NULL) {
nsGenericFactory* factory = new nsGenericFactory;
if (factory != NULL) {
res = factory->QueryInterface(aIID, aInstancePtr);
if (res != NS_OK)
delete factory;
} else {
res = NS_ERROR_OUT_OF_MEMORY;
}
}
return res;
}
NS_COM nsresult
NS_NewGenericFactory(nsIGenericFactory* *result,
nsModuleComponentInfo *info)
{
nsresult rv;
nsIGenericFactory* fact;
rv = nsGenericFactory::Create(NULL, NS_GET_IID(nsIGenericFactory), (void**)&fact);
if (NS_FAILED(rv)) return rv;
rv = fact->SetComponentInfo(info);
if (NS_FAILED(rv)) goto error;
*result = fact;
return rv;
error:
NS_RELEASE(fact);
return rv;
}
////////////////////////////////////////////////////////////////////////////////
nsGenericModule::nsGenericModule(const char* moduleName, PRUint32 componentCount,
nsModuleComponentInfo* components,
nsModuleDestructorProc dtor)
: mInitialized(PR_FALSE),
mModuleName(moduleName),
mComponentCount(componentCount),
mComponents(components),
mFactories(32, PR_FALSE),
mDtor(dtor)
{
NS_INIT_ISUPPORTS();
}
nsGenericModule::~nsGenericModule()
{
Shutdown();
}
NS_IMPL_THREADSAFE_ISUPPORTS1(nsGenericModule, nsIModule)
// Perform our one-time intialization for this module
nsresult
nsGenericModule::Initialize()
{
if (mInitialized) {
return NS_OK;
}
mInitialized = PR_TRUE;
return NS_OK;
}
// Shutdown this module, releasing all of the module resources
void
nsGenericModule::Shutdown()
{
if (mDtor)
mDtor(this);
// Release the factory objects
mFactories.Reset();
}
// Create a factory object for creating instances of aClass.
NS_IMETHODIMP
nsGenericModule::GetClassObject(nsIComponentManager *aCompMgr,
const nsCID& aClass,
const nsIID& aIID,
void** r_classObj)
{
nsresult rv;
// Defensive programming: Initialize *r_classObj in case of error below
if (!r_classObj) {
return NS_ERROR_INVALID_POINTER;
}
*r_classObj = NULL;
// Do one-time-only initialization if necessary
if (!mInitialized) {
rv = Initialize();
if (NS_FAILED(rv)) {
// Initialization failed! yikes!
return rv;
}
}
// Choose the appropriate factory, based on the desired instance
// class type (aClass).
nsIDKey key(aClass);
nsCOMPtr<nsIGenericFactory> fact = getter_AddRefs(NS_REINTERPRET_CAST(nsIGenericFactory *, mFactories.Get(&key)));
if (fact == nsnull) {
nsModuleComponentInfo* desc = mComponents;
for (PRUint32 i = 0; i < mComponentCount; i++) {
if (desc->mCID.Equals(aClass)) {
rv = NS_NewGenericFactory(getter_AddRefs(fact), desc);
if (NS_FAILED(rv)) return rv;
(void)mFactories.Put(&key, fact);
goto found;
}
desc++;
}
// not found in descriptions
#ifdef DEBUG
char* cs = aClass.ToString();
printf("+++ nsGenericModule %s: unable to create factory for %s\n", mModuleName, cs);
nsCRT::free(cs);
#endif
// XXX put in stop-gap so that we don't search for this one again
return NS_ERROR_FACTORY_NOT_REGISTERED;
}
found:
rv = fact->QueryInterface(aIID, r_classObj);
return rv;
}
NS_IMETHODIMP
nsGenericModule::RegisterSelf(nsIComponentManager *aCompMgr,
nsIFile* aPath,
const char* registryLocation,
const char* componentType)
{
nsresult rv = NS_OK;
#ifdef DEBUG
printf("*** Registering %s components (all right -- a generic module!)\n", mModuleName);
#endif
nsModuleComponentInfo* cp = mComponents;
for (PRUint32 i = 0; i < mComponentCount; i++) {
rv = aCompMgr->RegisterComponentSpec(cp->mCID, cp->mDescription,
cp->mContractID, aPath, PR_TRUE,
PR_TRUE);
if (NS_FAILED(rv)) {
#ifdef DEBUG
printf("nsGenericModule %s: unable to register %s component => %x\n",
mModuleName?mModuleName:"(null)", cp->mDescription?cp->mDescription:"(null)", rv);
#endif
break;
}
// Call the registration hook of the component, if any
if (cp->mRegisterSelfProc)
{
rv = cp->mRegisterSelfProc(aCompMgr, aPath, registryLocation,
componentType, cp);
if (NS_FAILED(rv)) {
#ifdef DEBUG
printf("nsGenericModule %s: Register hook for %s component returned error => %x\n",
mModuleName?mModuleName:"(null)", cp->mDescription?cp->mDescription:"(null)", rv);
#endif
break;
}
}
cp++;
}
return rv;
}
NS_IMETHODIMP
nsGenericModule::UnregisterSelf(nsIComponentManager* aCompMgr,
nsIFile* aPath,
const char* registryLocation)
{
#ifdef DEBUG
printf("*** Unregistering %s components (all right -- a generic module!)\n", mModuleName);
#endif
nsModuleComponentInfo* cp = mComponents;
for (PRUint32 i = 0; i < mComponentCount; i++) {
// Call the unregistration hook of the component, if any
if (cp->mUnregisterSelfProc)
{
cp->mUnregisterSelfProc(aCompMgr, aPath, registryLocation, cp);
}
// Unregister the component
nsresult rv = aCompMgr->UnregisterComponentSpec(cp->mCID, aPath);
if (NS_FAILED(rv)) {
#ifdef DEBUG
printf("nsGenericModule %s: unable to unregister %s component => %x\n",
mModuleName, cp->mDescription, rv);
#endif
}
cp++;
}
return NS_OK;
}
NS_IMETHODIMP
nsGenericModule::CanUnload(nsIComponentManager *aCompMgr, PRBool *okToUnload)
{
if (!okToUnload) {
return NS_ERROR_INVALID_POINTER;
}
*okToUnload = PR_FALSE;
return NS_ERROR_FAILURE;
}
NS_COM nsresult
NS_NewGenericModule(const char* moduleName,
PRUint32 componentCount,
nsModuleComponentInfo* components,
nsModuleDestructorProc dtor,
nsIModule* *result)
{
nsresult rv = NS_OK;
NS_ASSERTION(result, "Null argument");
// Create and initialize the module instance
nsGenericModule *m =
new nsGenericModule(moduleName, componentCount, components, dtor);
if (!m) {
return NS_ERROR_OUT_OF_MEMORY;
}
// Increase refcnt and store away nsIModule interface to m in return_cobj
rv = m->QueryInterface(NS_GET_IID(nsIModule), (void**)result);
if (NS_FAILED(rv)) {
delete m;
m = nsnull;
}
return rv;
}
////////////////////////////////////////////////////////////////////////////////
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