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gecko-dev/dom/indexedDB/IDBCursor.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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 "base/basictypes.h"
#include "IDBCursor.h"
#include "mozilla/storage.h"
#include "nsComponentManagerUtils.h"
#include "nsContentUtils.h"
#include "nsDOMClassInfoID.h"
#include "nsEventDispatcher.h"
#include "nsJSUtils.h"
#include "nsThreadUtils.h"
#include "AsyncConnectionHelper.h"
#include "IDBEvents.h"
#include "IDBIndex.h"
#include "IDBObjectStore.h"
#include "IDBTransaction.h"
#include "TransactionThreadPool.h"
#include "ipc/IndexedDBChild.h"
#include "ipc/IndexedDBParent.h"
#include "IndexedDatabaseInlines.h"
USING_INDEXEDDB_NAMESPACE
using namespace mozilla::dom::indexedDB::ipc;
MOZ_STATIC_ASSERT(sizeof(size_t) >= sizeof(IDBCursor::Direction),
"Relying on conversion between size_t and "
"IDBCursor::Direction");
namespace {
class CursorHelper : public AsyncConnectionHelper
{
public:
CursorHelper(IDBCursor* aCursor)
: AsyncConnectionHelper(aCursor->Transaction(), aCursor->Request()),
mCursor(aCursor), mActor(nullptr)
{
NS_ASSERTION(aCursor, "Null cursor!");
}
virtual void ReleaseMainThreadObjects() MOZ_OVERRIDE;
virtual nsresult Dispatch(nsIEventTarget* aDatabaseThread) MOZ_OVERRIDE;
virtual nsresult
PackArgumentsForParentProcess(CursorRequestParams& aParams) = 0;
virtual nsresult
UnpackResponseFromParentProcess(const ResponseValue& aResponseValue) = 0;
protected:
nsRefPtr<IDBCursor> mCursor;
private:
IndexedDBCursorRequestChild* mActor;
};
} // anonymous namespace
BEGIN_INDEXEDDB_NAMESPACE
class ContinueHelper : public CursorHelper
{
public:
ContinueHelper(IDBCursor* aCursor,
int32_t aCount)
: CursorHelper(aCursor), mCount(aCount)
{
NS_ASSERTION(aCount > 0, "Must have a count!");
}
~ContinueHelper()
{
IDBObjectStore::ClearCloneReadInfo(mCloneReadInfo);
}
virtual nsresult DoDatabaseWork(mozIStorageConnection* aConnection)
MOZ_OVERRIDE;
virtual nsresult GetSuccessResult(JSContext* aCx,
jsval* aVal) MOZ_OVERRIDE;
virtual void ReleaseMainThreadObjects() MOZ_OVERRIDE;
virtual nsresult
PackArgumentsForParentProcess(CursorRequestParams& aParams) MOZ_OVERRIDE;
virtual ChildProcessSendResult
SendResponseToChildProcess(nsresult aResultCode) MOZ_OVERRIDE;
virtual nsresult
UnpackResponseFromParentProcess(const ResponseValue& aResponseValue)
MOZ_OVERRIDE;
protected:
virtual nsresult
BindArgumentsToStatement(mozIStorageStatement* aStatement) = 0;
virtual nsresult
GatherResultsFromStatement(mozIStorageStatement* aStatement) = 0;
void UpdateCursorState()
{
mCursor->mCachedKey = JSVAL_VOID;
mCursor->mCachedPrimaryKey = JSVAL_VOID;
mCursor->mCachedValue = JSVAL_VOID;
mCursor->mHaveCachedKey = false;
mCursor->mHaveCachedPrimaryKey = false;
mCursor->mHaveCachedValue = false;
mCursor->mContinueCalled = false;
if (mKey.IsUnset()) {
mCursor->mHaveValue = false;
}
else {
NS_ASSERTION(mCursor->mType == IDBCursor::OBJECTSTORE ||
!mObjectKey.IsUnset(), "Bad key!");
// Set new values.
mCursor->mKey = mKey;
mCursor->mObjectKey = mObjectKey;
mCursor->mContinueToKey.Unset();
mCursor->mCloneReadInfo.Swap(mCloneReadInfo);
mCloneReadInfo.mCloneBuffer.clear();
}
}
int32_t mCount;
Key mKey;
Key mObjectKey;
StructuredCloneReadInfo mCloneReadInfo;
};
class ContinueObjectStoreHelper : public ContinueHelper
{
public:
ContinueObjectStoreHelper(IDBCursor* aCursor,
uint32_t aCount)
: ContinueHelper(aCursor, aCount)
{ }
private:
nsresult BindArgumentsToStatement(mozIStorageStatement* aStatement);
nsresult GatherResultsFromStatement(mozIStorageStatement* aStatement);
};
class ContinueIndexHelper : public ContinueHelper
{
public:
ContinueIndexHelper(IDBCursor* aCursor,
uint32_t aCount)
: ContinueHelper(aCursor, aCount)
{ }
private:
nsresult BindArgumentsToStatement(mozIStorageStatement* aStatement);
nsresult GatherResultsFromStatement(mozIStorageStatement* aStatement);
};
class ContinueIndexObjectHelper : public ContinueIndexHelper
{
public:
ContinueIndexObjectHelper(IDBCursor* aCursor,
uint32_t aCount)
: ContinueIndexHelper(aCursor, aCount)
{ }
private:
nsresult GatherResultsFromStatement(mozIStorageStatement* aStatement);
};
END_INDEXEDDB_NAMESPACE
// static
already_AddRefed<IDBCursor>
IDBCursor::Create(IDBRequest* aRequest,
IDBTransaction* aTransaction,
IDBObjectStore* aObjectStore,
Direction aDirection,
const Key& aRangeKey,
const nsACString& aContinueQuery,
const nsACString& aContinueToQuery,
const Key& aKey,
StructuredCloneReadInfo& aCloneReadInfo)
{
NS_ASSERTION(aObjectStore, "Null pointer!");
NS_ASSERTION(!aKey.IsUnset(), "Bad key!");
nsRefPtr<IDBCursor> cursor =
IDBCursor::CreateCommon(aRequest, aTransaction, aObjectStore, aDirection,
aRangeKey, aContinueQuery, aContinueToQuery);
NS_ASSERTION(cursor, "This shouldn't fail!");
cursor->mObjectStore = aObjectStore;
cursor->mType = OBJECTSTORE;
cursor->mKey = aKey;
cursor->mCloneReadInfo.Swap(aCloneReadInfo);
return cursor.forget();
}
// static
already_AddRefed<IDBCursor>
IDBCursor::Create(IDBRequest* aRequest,
IDBTransaction* aTransaction,
IDBIndex* aIndex,
Direction aDirection,
const Key& aRangeKey,
const nsACString& aContinueQuery,
const nsACString& aContinueToQuery,
const Key& aKey,
const Key& aObjectKey)
{
NS_ASSERTION(aIndex, "Null pointer!");
NS_ASSERTION(!aKey.IsUnset(), "Bad key!");
NS_ASSERTION(!aObjectKey.IsUnset(), "Bad key!");
nsRefPtr<IDBCursor> cursor =
IDBCursor::CreateCommon(aRequest, aTransaction, aIndex->ObjectStore(),
aDirection, aRangeKey, aContinueQuery,
aContinueToQuery);
NS_ASSERTION(cursor, "This shouldn't fail!");
cursor->mIndex = aIndex;
cursor->mType = INDEXKEY;
cursor->mKey = aKey,
cursor->mObjectKey = aObjectKey;
return cursor.forget();
}
// static
already_AddRefed<IDBCursor>
IDBCursor::Create(IDBRequest* aRequest,
IDBTransaction* aTransaction,
IDBIndex* aIndex,
Direction aDirection,
const Key& aRangeKey,
const nsACString& aContinueQuery,
const nsACString& aContinueToQuery,
const Key& aKey,
const Key& aObjectKey,
StructuredCloneReadInfo& aCloneReadInfo)
{
NS_ASSERTION(aIndex, "Null pointer!");
NS_ASSERTION(!aKey.IsUnset(), "Bad key!");
nsRefPtr<IDBCursor> cursor =
IDBCursor::CreateCommon(aRequest, aTransaction, aIndex->ObjectStore(),
aDirection, aRangeKey, aContinueQuery,
aContinueToQuery);
NS_ASSERTION(cursor, "This shouldn't fail!");
cursor->mObjectStore = aIndex->ObjectStore();
cursor->mIndex = aIndex;
cursor->mType = INDEXOBJECT;
cursor->mKey = aKey;
cursor->mObjectKey = aObjectKey;
cursor->mCloneReadInfo.Swap(aCloneReadInfo);
return cursor.forget();
}
// static
nsresult
IDBCursor::ParseDirection(const nsAString& aDirection, Direction* aResult)
{
if (aDirection.EqualsLiteral("next")) {
*aResult = NEXT;
}
else if (aDirection.EqualsLiteral("nextunique")) {
*aResult = NEXT_UNIQUE;
}
else if (aDirection.EqualsLiteral("prev")) {
*aResult = PREV;
}
else if (aDirection.EqualsLiteral("prevunique")) {
*aResult = PREV_UNIQUE;
}
else {
return NS_ERROR_TYPE_ERR;
}
return NS_OK;
}
// static
already_AddRefed<IDBCursor>
IDBCursor::CreateCommon(IDBRequest* aRequest,
IDBTransaction* aTransaction,
IDBObjectStore* aObjectStore,
Direction aDirection,
const Key& aRangeKey,
const nsACString& aContinueQuery,
const nsACString& aContinueToQuery)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(aRequest, "Null pointer!");
NS_ASSERTION(aTransaction, "Null pointer!");
NS_ASSERTION(aObjectStore, "Null pointer!");
NS_ASSERTION(!aContinueQuery.IsEmpty() ||
!IndexedDatabaseManager::IsMainProcess(),
"Empty query!");
NS_ASSERTION(!aContinueToQuery.IsEmpty() ||
!IndexedDatabaseManager::IsMainProcess(),
"Empty query!");
nsRefPtr<IDBCursor> cursor = new IDBCursor();
IDBDatabase* database = aTransaction->Database();
cursor->mScriptOwner = database->GetScriptOwner();
if (cursor->mScriptOwner) {
NS_HOLD_JS_OBJECTS(cursor, IDBCursor);
cursor->mRooted = true;
}
cursor->mRequest = aRequest;
cursor->mTransaction = aTransaction;
cursor->mObjectStore = aObjectStore;
cursor->mDirection = aDirection;
cursor->mContinueQuery = aContinueQuery;
cursor->mContinueToQuery = aContinueToQuery;
cursor->mRangeKey = aRangeKey;
return cursor.forget();
}
IDBCursor::IDBCursor()
: mScriptOwner(nullptr),
mType(OBJECTSTORE),
mDirection(IDBCursor::NEXT),
mCachedKey(JSVAL_VOID),
mCachedPrimaryKey(JSVAL_VOID),
mCachedValue(JSVAL_VOID),
mActorChild(nullptr),
mActorParent(nullptr),
mHaveCachedKey(false),
mHaveCachedPrimaryKey(false),
mHaveCachedValue(false),
mRooted(false),
mContinueCalled(false),
mHaveValue(true)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
}
IDBCursor::~IDBCursor()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(!mActorParent, "Actor parent owns us, how can we be dying?!");
if (mActorChild) {
NS_ASSERTION(!IndexedDatabaseManager::IsMainProcess(), "Wrong process!");
mActorChild->Send__delete__(mActorChild);
NS_ASSERTION(!mActorChild, "Should have cleared in Send__delete__!");
}
DropJSObjects();
IDBObjectStore::ClearCloneReadInfo(mCloneReadInfo);
}
void
IDBCursor::DropJSObjects()
{
if (!mRooted) {
return;
}
mScriptOwner = nullptr;
mCachedKey = JSVAL_VOID;
mCachedPrimaryKey = JSVAL_VOID;
mCachedValue = JSVAL_VOID;
mHaveCachedKey = false;
mHaveCachedPrimaryKey = false;
mHaveCachedValue = false;
mRooted = false;
mHaveValue = false;
NS_DROP_JS_OBJECTS(this, IDBCursor);
}
nsresult
IDBCursor::ContinueInternal(const Key& aKey,
int32_t aCount)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(aCount > 0, "Must have a count!");
if (!mTransaction->IsOpen()) {
return NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR;
}
if (!mHaveValue || mContinueCalled) {
return NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR;
}
mContinueToKey = aKey;
#ifdef DEBUG
{
nsAutoString readyState;
if (NS_FAILED(mRequest->GetReadyState(readyState))) {
NS_ERROR("This should never fail!");
}
NS_ASSERTION(readyState.EqualsLiteral("done"), "Should be DONE!");
}
#endif
mRequest->Reset();
nsRefPtr<ContinueHelper> helper;
switch (mType) {
case OBJECTSTORE:
helper = new ContinueObjectStoreHelper(this, aCount);
break;
case INDEXKEY:
helper = new ContinueIndexHelper(this, aCount);
break;
case INDEXOBJECT:
helper = new ContinueIndexObjectHelper(this, aCount);
break;
default:
NS_NOTREACHED("Unknown cursor type!");
}
nsresult rv = helper->DispatchToTransactionPool();
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
mContinueCalled = true;
return NS_OK;
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(IDBCursor)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRequest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTransaction)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mObjectStore)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mIndex)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(IDBCursor)
NS_ASSERTION(tmp->mHaveCachedKey || JSVAL_IS_VOID(tmp->mCachedKey),
"Should have a cached key");
NS_ASSERTION(tmp->mHaveCachedPrimaryKey ||
JSVAL_IS_VOID(tmp->mCachedPrimaryKey),
"Should have a cached primary key");
NS_ASSERTION(tmp->mHaveCachedValue || JSVAL_IS_VOID(tmp->mCachedValue),
"Should have a cached value");
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mScriptOwner)
NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mCachedKey)
NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mCachedPrimaryKey)
NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mCachedValue)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(IDBCursor)
// Don't unlink mObjectStore, mIndex, or mTransaction!
tmp->DropJSObjects();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mRequest)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(IDBCursor)
NS_INTERFACE_MAP_ENTRY(nsIIDBCursor)
NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIIDBCursorWithValue, mType != INDEXKEY)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO_CONDITIONAL(IDBCursorWithValue,
mType != INDEXKEY)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO_CONDITIONAL(IDBCursor,
mType == INDEXKEY)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(IDBCursor)
NS_IMPL_CYCLE_COLLECTING_RELEASE(IDBCursor)
DOMCI_DATA(IDBCursor, IDBCursor)
DOMCI_DATA(IDBCursorWithValue, IDBCursor)
NS_IMETHODIMP
IDBCursor::GetDirection(nsAString& aDirection)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
switch (mDirection) {
case NEXT:
aDirection.AssignLiteral("next");
break;
case NEXT_UNIQUE:
aDirection.AssignLiteral("nextunique");
break;
case PREV:
aDirection.AssignLiteral("prev");
break;
case PREV_UNIQUE:
aDirection.AssignLiteral("prevunique");
break;
case DIRECTION_INVALID:
default:
NS_NOTREACHED("Bad direction value!");
return NS_ERROR_UNEXPECTED;
}
return NS_OK;
}
NS_IMETHODIMP
IDBCursor::GetSource(nsISupports** aSource)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
return mType == OBJECTSTORE ?
CallQueryInterface(mObjectStore, aSource) :
CallQueryInterface(mIndex, aSource);
}
NS_IMETHODIMP
IDBCursor::GetKey(JSContext* aCx,
jsval* aKey)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(!mKey.IsUnset() || !mHaveValue, "Bad key!");
if (!mHaveValue) {
*aKey = JSVAL_VOID;
return NS_OK;
}
if (!mHaveCachedKey) {
if (!mRooted) {
NS_HOLD_JS_OBJECTS(this, IDBCursor);
mRooted = true;
}
JSAutoRequest ar(aCx);
nsresult rv = mKey.ToJSVal(aCx, &mCachedKey);
NS_ENSURE_SUCCESS(rv, rv);
mHaveCachedKey = true;
}
*aKey = mCachedKey;
return NS_OK;
}
NS_IMETHODIMP
IDBCursor::GetPrimaryKey(JSContext* aCx,
jsval* aValue)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (!mHaveValue) {
*aValue = JSVAL_VOID;
return NS_OK;
}
if (!mHaveCachedPrimaryKey) {
if (!mRooted) {
NS_HOLD_JS_OBJECTS(this, IDBCursor);
mRooted = true;
}
JSAutoRequest ar(aCx);
NS_ASSERTION(mType == OBJECTSTORE ? !mKey.IsUnset() :
!mObjectKey.IsUnset(), "Bad key!");
const Key& key = mType == OBJECTSTORE ? mKey : mObjectKey;
nsresult rv = key.ToJSVal(aCx, &mCachedPrimaryKey);
NS_ENSURE_SUCCESS(rv, rv);
mHaveCachedPrimaryKey = true;
}
*aValue = mCachedPrimaryKey;
return NS_OK;
}
NS_IMETHODIMP
IDBCursor::GetValue(JSContext* aCx,
jsval* aValue)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(mType != INDEXKEY, "GetValue shouldn't exist on index keys");
if (!mHaveValue) {
*aValue = JSVAL_VOID;
return NS_OK;
}
if (!mHaveCachedValue) {
if (!mRooted) {
NS_HOLD_JS_OBJECTS(this, IDBCursor);
mRooted = true;
}
jsval val;
if (!IDBObjectStore::DeserializeValue(aCx, mCloneReadInfo, &val)) {
return NS_ERROR_DOM_DATA_CLONE_ERR;
}
mCloneReadInfo.mCloneBuffer.clear();
mCachedValue = val;
mHaveCachedValue = true;
}
*aValue = mCachedValue;
return NS_OK;
}
NS_IMETHODIMP
IDBCursor::Continue(const jsval &aKey,
JSContext* aCx)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
Key key;
nsresult rv = key.SetFromJSVal(aCx, aKey);
NS_ENSURE_SUCCESS(rv, rv);
if (!key.IsUnset()) {
switch (mDirection) {
case IDBCursor::NEXT:
case IDBCursor::NEXT_UNIQUE:
if (key <= mKey) {
return NS_ERROR_DOM_INDEXEDDB_DATA_ERR;
}
break;
case IDBCursor::PREV:
case IDBCursor::PREV_UNIQUE:
if (key >= mKey) {
return NS_ERROR_DOM_INDEXEDDB_DATA_ERR;
}
break;
default:
NS_NOTREACHED("Unknown direction type!");
}
}
return ContinueInternal(key, 1);
}
NS_IMETHODIMP
IDBCursor::Update(const jsval& aValue,
JSContext* aCx,
nsIIDBRequest** _retval)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (!mTransaction->IsOpen()) {
return NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR;
}
if (!mTransaction->IsWriteAllowed()) {
return NS_ERROR_DOM_INDEXEDDB_READ_ONLY_ERR;
}
if (!mHaveValue || mType == INDEXKEY) {
return NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR;
}
NS_ASSERTION(mObjectStore, "This cannot be null!");
NS_ASSERTION(!mKey.IsUnset() , "Bad key!");
NS_ASSERTION(mType != INDEXOBJECT || !mObjectKey.IsUnset(), "Bad key!");
nsresult rv;
JSAutoRequest ar(aCx);
Key& objectKey = (mType == OBJECTSTORE) ? mKey : mObjectKey;
if (mObjectStore->HasValidKeyPath()) {
// Make sure the object given has the correct keyPath value set on it.
const KeyPath& keyPath = mObjectStore->GetKeyPath();
Key key;
rv = keyPath.ExtractKey(aCx, aValue, key);
if (NS_FAILED(rv)) {
return rv;
}
if (key != objectKey) {
return NS_ERROR_DOM_INDEXEDDB_DATA_ERR;
}
return mObjectStore->Put(aValue, JSVAL_VOID, aCx, 0, _retval);
}
jsval keyVal;
rv = objectKey.ToJSVal(aCx, &keyVal);
NS_ENSURE_SUCCESS(rv, rv);
return mObjectStore->Put(aValue, keyVal, aCx, 1, _retval);
}
NS_IMETHODIMP
IDBCursor::Delete(JSContext* aCx,
nsIIDBRequest** _retval)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (!mTransaction->IsOpen()) {
return NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR;
}
if (!mTransaction->IsWriteAllowed()) {
return NS_ERROR_DOM_INDEXEDDB_READ_ONLY_ERR;
}
if (!mHaveValue || mType == INDEXKEY) {
return NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR;
}
NS_ASSERTION(mObjectStore, "This cannot be null!");
NS_ASSERTION(!mKey.IsUnset() , "Bad key!");
Key& objectKey = (mType == OBJECTSTORE) ? mKey : mObjectKey;
jsval key;
nsresult rv = objectKey.ToJSVal(aCx, &key);
NS_ENSURE_SUCCESS(rv, rv);
return mObjectStore->Delete(key, aCx, _retval);
}
NS_IMETHODIMP
IDBCursor::Advance(int64_t aCount)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (aCount < 1 || aCount > UINT32_MAX) {
return NS_ERROR_TYPE_ERR;
}
Key key;
return ContinueInternal(key, int32_t(aCount));
}
void
CursorHelper::ReleaseMainThreadObjects()
{
mCursor = nullptr;
AsyncConnectionHelper::ReleaseMainThreadObjects();
}
nsresult
CursorHelper::Dispatch(nsIEventTarget* aDatabaseThread)
{
if (IndexedDatabaseManager::IsMainProcess()) {
return AsyncConnectionHelper::Dispatch(aDatabaseThread);
}
// If we've been invalidated then there's no point sending anything to the
// parent process.
if (mCursor->Transaction()->Database()->IsInvalidated()) {
return NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR;
}
IndexedDBCursorChild* cursorActor = mCursor->GetActorChild();
NS_ASSERTION(cursorActor, "Must have an actor here!");
CursorRequestParams params;
nsresult rv = PackArgumentsForParentProcess(params);
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
NoDispatchEventTarget target;
rv = AsyncConnectionHelper::Dispatch(&target);
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
mActor = new IndexedDBCursorRequestChild(this, mCursor, params.type());
cursorActor->SendPIndexedDBRequestConstructor(mActor, params);
return NS_OK;
}
nsresult
ContinueHelper::DoDatabaseWork(mozIStorageConnection* aConnection)
{
// We need to pick a query based on whether or not the cursor's mContinueToKey
// is set. If it is unset then othing was passed to continue so we'll grab the
// next item in the database that is greater than (less than, if we're running
// a PREV cursor) the current key. If it is set then a key was passed to
// continue so we'll grab the next item in the database that is greater than
// (less than, if we're running a PREV cursor) or equal to the key that was
// specified.
nsAutoCString query;
if (mCursor->mContinueToKey.IsUnset()) {
query.Assign(mCursor->mContinueQuery);
}
else {
query.Assign(mCursor->mContinueToQuery);
}
NS_ASSERTION(!query.IsEmpty(), "Bad query!");
query.AppendInt(mCount);
nsCOMPtr<mozIStorageStatement> stmt = mTransaction->GetCachedStatement(query);
NS_ENSURE_TRUE(stmt, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
mozStorageStatementScoper scoper(stmt);
nsresult rv = BindArgumentsToStatement(stmt);
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
NS_ASSERTION(mCount > 0, "Not ok!");
bool hasResult;
for (int32_t index = 0; index < mCount; index++) {
rv = stmt->ExecuteStep(&hasResult);
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
if (!hasResult) {
break;
}
}
if (hasResult) {
rv = GatherResultsFromStatement(stmt);
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
}
else {
mKey.Unset();
}
return NS_OK;
}
nsresult
ContinueHelper::GetSuccessResult(JSContext* aCx,
jsval* aVal)
{
UpdateCursorState();
if (mKey.IsUnset()) {
*aVal = JSVAL_NULL;
}
else {
nsresult rv = WrapNative(aCx, mCursor, aVal);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
void
ContinueHelper::ReleaseMainThreadObjects()
{
IDBObjectStore::ClearCloneReadInfo(mCloneReadInfo);
CursorHelper::ReleaseMainThreadObjects();
}
nsresult
ContinueHelper::PackArgumentsForParentProcess(CursorRequestParams& aParams)
{
ContinueParams params;
params.key() = mCursor->mContinueToKey;
params.count() = uint32_t(mCount);
aParams = params;
return NS_OK;
}
AsyncConnectionHelper::ChildProcessSendResult
ContinueHelper::SendResponseToChildProcess(nsresult aResultCode)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(IndexedDatabaseManager::IsMainProcess(), "Wrong process!");
IndexedDBRequestParentBase* actor = mRequest->GetActorParent();
NS_ASSERTION(actor, "How did we get this far without an actor?");
InfallibleTArray<PBlobParent*> blobsParent;
if (NS_SUCCEEDED(aResultCode)) {
IDBDatabase* database = mTransaction->Database();
NS_ASSERTION(database, "This should never be null!");
ContentParent* contentParent = database->GetContentParent();
NS_ASSERTION(contentParent, "This should never be null!");
FileManager* fileManager = database->Manager();
NS_ASSERTION(fileManager, "This should never be null!");
const nsTArray<StructuredCloneFile>& files = mCloneReadInfo.mFiles;
aResultCode =
IDBObjectStore::ConvertBlobsToActors(contentParent, fileManager, files,
blobsParent);
if (NS_FAILED(aResultCode)) {
NS_WARNING("ConvertBlobsToActors failed!");
}
}
ResponseValue response;
if (NS_FAILED(aResultCode)) {
response = aResultCode;
}
else {
ContinueResponse continueResponse;
continueResponse.key() = mKey;
continueResponse.objectKey() = mObjectKey;
continueResponse.cloneInfo() = mCloneReadInfo;
continueResponse.blobsParent().SwapElements(blobsParent);
response = continueResponse;
}
if (!actor->SendResponse(response)) {
return Error;
}
UpdateCursorState();
return Success_Sent;
}
nsresult
ContinueHelper::UnpackResponseFromParentProcess(
const ResponseValue& aResponseValue)
{
NS_ASSERTION(aResponseValue.type() == ResponseValue::TContinueResponse,
"Bad response type!");
const ContinueResponse& response = aResponseValue.get_ContinueResponse();
mKey = response.key();
mObjectKey = response.objectKey();
const SerializedStructuredCloneReadInfo& cloneInfo = response.cloneInfo();
NS_ASSERTION((!cloneInfo.dataLength && !cloneInfo.data) ||
(cloneInfo.dataLength && cloneInfo.data),
"Inconsistent clone info!");
if (!mCloneReadInfo.SetFromSerialized(cloneInfo)) {
NS_WARNING("Failed to copy clone buffer!");
return NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR;
}
IDBObjectStore::ConvertActorsToBlobs(response.blobsChild(),
mCloneReadInfo.mFiles);
return NS_OK;
}
nsresult
ContinueObjectStoreHelper::BindArgumentsToStatement(
mozIStorageStatement* aStatement)
{
// Bind object store id.
nsresult rv = aStatement->BindInt64ByName(NS_LITERAL_CSTRING("id"),
mCursor->mObjectStore->Id());
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
NS_NAMED_LITERAL_CSTRING(currentKeyName, "current_key");
NS_NAMED_LITERAL_CSTRING(rangeKeyName, "range_key");
// Bind current key.
const Key& currentKey = mCursor->mContinueToKey.IsUnset() ?
mCursor->mKey :
mCursor->mContinueToKey;
rv = currentKey.BindToStatement(aStatement, currentKeyName);
NS_ENSURE_SUCCESS(rv, rv);
// Bind range key if it is specified.
const Key& rangeKey = mCursor->mRangeKey;
if (!rangeKey.IsUnset()) {
rv = rangeKey.BindToStatement(aStatement, rangeKeyName);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
nsresult
ContinueObjectStoreHelper::GatherResultsFromStatement(
mozIStorageStatement* aStatement)
{
// Figure out what kind of key we have next.
nsresult rv = mKey.SetFromStatement(aStatement, 0);
NS_ENSURE_SUCCESS(rv, rv);
rv = IDBObjectStore::GetStructuredCloneReadInfoFromStatement(aStatement, 1, 2,
mDatabase, mCloneReadInfo);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
ContinueIndexHelper::BindArgumentsToStatement(mozIStorageStatement* aStatement)
{
// Bind index id.
nsresult rv = aStatement->BindInt64ByName(NS_LITERAL_CSTRING("id"),
mCursor->mIndex->Id());
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
NS_NAMED_LITERAL_CSTRING(currentKeyName, "current_key");
// Bind current key.
const Key& currentKey = mCursor->mContinueToKey.IsUnset() ?
mCursor->mKey :
mCursor->mContinueToKey;
rv = currentKey.BindToStatement(aStatement, currentKeyName);
NS_ENSURE_SUCCESS(rv, rv);
// Bind range key if it is specified.
if (!mCursor->mRangeKey.IsUnset()) {
NS_NAMED_LITERAL_CSTRING(rangeKeyName, "range_key");
rv = mCursor->mRangeKey.BindToStatement(aStatement, rangeKeyName);
NS_ENSURE_SUCCESS(rv, rv);
}
// Bind object key if duplicates are allowed and we're not continuing to a
// specific key.
if ((mCursor->mDirection == IDBCursor::NEXT ||
mCursor->mDirection == IDBCursor::PREV) &&
mCursor->mContinueToKey.IsUnset()) {
NS_ASSERTION(!mCursor->mObjectKey.IsUnset(), "Bad key!");
NS_NAMED_LITERAL_CSTRING(objectKeyName, "object_key");
rv = mCursor->mObjectKey.BindToStatement(aStatement, objectKeyName);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
nsresult
ContinueIndexHelper::GatherResultsFromStatement(
mozIStorageStatement* aStatement)
{
nsresult rv = mKey.SetFromStatement(aStatement, 0);
NS_ENSURE_SUCCESS(rv, rv);
rv = mObjectKey.SetFromStatement(aStatement, 1);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
ContinueIndexObjectHelper::GatherResultsFromStatement(
mozIStorageStatement* aStatement)
{
nsresult rv = mKey.SetFromStatement(aStatement, 0);
NS_ENSURE_SUCCESS(rv, rv);
rv = mObjectKey.SetFromStatement(aStatement, 1);
NS_ENSURE_SUCCESS(rv, rv);
rv = IDBObjectStore::GetStructuredCloneReadInfoFromStatement(aStatement, 2, 3,
mDatabase, mCloneReadInfo);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
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