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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: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 Indexed Database.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Ben Turner <bent.mozilla@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#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"
USING_INDEXEDDB_NAMESPACE
namespace {
inline
already_AddRefed<IDBRequest>
GenerateRequest(IDBCursor* aCursor)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
IDBDatabase* database = aCursor->Transaction()->Database();
return IDBRequest::Create(aCursor, database, aCursor->Transaction());
}
} // anonymous namespace
BEGIN_INDEXEDDB_NAMESPACE
class ContinueHelper : public AsyncConnectionHelper
{
public:
ContinueHelper(IDBCursor* aCursor,
PRInt32 aCount)
: AsyncConnectionHelper(aCursor->mTransaction, aCursor->mRequest),
mCursor(aCursor), mCount(aCount)
{
NS_ASSERTION(aCount > 0, "Must have a count!");
}
~ContinueHelper()
{
IDBObjectStore::ClearStructuredCloneBuffer(mCloneReadInfo.mCloneBuffer);
}
nsresult DoDatabaseWork(mozIStorageConnection* aConnection);
nsresult GetSuccessResult(JSContext* aCx,
jsval* aVal);
void ReleaseMainThreadObjects()
{
mCursor = nsnull;
AsyncConnectionHelper::ReleaseMainThreadObjects();
}
protected:
virtual nsresult
BindArgumentsToStatement(mozIStorageStatement* aStatement) = 0;
virtual nsresult
GatherResultsFromStatement(mozIStorageStatement* aStatement) = 0;
protected:
nsRefPtr<IDBCursor> mCursor;
PRInt32 mCount;
Key mKey;
Key mObjectKey;
StructuredCloneReadInfo mCloneReadInfo;
};
class ContinueObjectStoreHelper : public ContinueHelper
{
public:
ContinueObjectStoreHelper(IDBCursor* aCursor,
PRUint32 aCount)
: ContinueHelper(aCursor, aCount)
{ }
private:
nsresult BindArgumentsToStatement(mozIStorageStatement* aStatement);
nsresult GatherResultsFromStatement(mozIStorageStatement* aStatement);
};
class ContinueIndexHelper : public ContinueHelper
{
public:
ContinueIndexHelper(IDBCursor* aCursor,
PRUint32 aCount)
: ContinueHelper(aCursor, aCount)
{ }
private:
nsresult BindArgumentsToStatement(mozIStorageStatement* aStatement);
nsresult GatherResultsFromStatement(mozIStorageStatement* aStatement);
};
class ContinueIndexObjectHelper : public ContinueIndexHelper
{
public:
ContinueIndexObjectHelper(IDBCursor* aCursor,
PRUint32 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(), "Empty query!");
NS_ASSERTION(!aContinueToQuery.IsEmpty(), "Empty query!");
nsRefPtr<IDBCursor> cursor = new IDBCursor();
IDBDatabase* database = aTransaction->Database();
cursor->mScriptOwner = database->GetScriptOwner();
if (cursor->mScriptOwner) {
if (NS_FAILED(NS_HOLD_JS_OBJECTS(cursor, IDBCursor))) {
return nsnull;
}
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(nsnull),
mType(OBJECTSTORE),
mDirection(IDBCursor::NEXT),
mCachedKey(JSVAL_VOID),
mCachedPrimaryKey(JSVAL_VOID),
mCachedValue(JSVAL_VOID),
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!");
if (mRooted) {
NS_DROP_JS_OBJECTS(this, IDBCursor);
}
IDBObjectStore::ClearStructuredCloneBuffer(mCloneReadInfo.mCloneBuffer);
}
nsresult
IDBCursor::ContinueInternal(const Key& aKey,
PRInt32 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_CLASS(IDBCursor)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(IDBCursor)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR_AMBIGUOUS(mRequest,
nsIDOMEventTarget)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR_AMBIGUOUS(mTransaction,
nsIDOMEventTarget)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mObjectStore)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(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");
if (tmp->mScriptOwner) {
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_CALLBACK(tmp->mScriptOwner,
"mScriptOwner")
}
if (JSVAL_IS_GCTHING(tmp->mCachedKey)) {
void *gcThing = JSVAL_TO_GCTHING(tmp->mCachedKey);
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_CALLBACK(gcThing, "mCachedKey")
}
if (JSVAL_IS_GCTHING(tmp->mCachedPrimaryKey)) {
void *gcThing = JSVAL_TO_GCTHING(tmp->mCachedPrimaryKey);
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_CALLBACK(gcThing, "mCachedPrimaryKey")
}
if (JSVAL_IS_GCTHING(tmp->mCachedValue)) {
void *gcThing = JSVAL_TO_GCTHING(tmp->mCachedValue);
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_CALLBACK(gcThing, "mCachedValue")
}
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(IDBCursor)
// Don't unlink mObjectStore, mIndex, or mTransaction!
if (tmp->mRooted) {
NS_DROP_JS_OBJECTS(tmp, IDBCursor);
tmp->mScriptOwner = nsnull;
tmp->mCachedKey = JSVAL_VOID;
tmp->mCachedPrimaryKey = JSVAL_VOID;
tmp->mCachedValue = JSVAL_VOID;
tmp->mHaveCachedKey = false;
tmp->mHaveCachedPrimaryKey = false;
tmp->mHaveCachedValue = false;
tmp->mRooted = false;
tmp->mHaveValue = false;
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(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");
}
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;
}
if (!IDBObjectStore::DeserializeValue(aCx, mCloneReadInfo, &mCachedValue)) {
mCachedValue = JSVAL_VOID;
return NS_ERROR_DOM_DATA_CLONE_ERR;
}
mCloneReadInfo.mCloneBuffer.clear();
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->KeyPath().IsEmpty()) {
// This has to be an object.
if (JSVAL_IS_PRIMITIVE(aValue)) {
return NS_ERROR_DOM_INDEXEDDB_DATA_ERR;
}
// Make sure the object given has the correct keyPath value set on it.
const nsString& keyPath = mObjectStore->KeyPath();
jsval prop;
JSBool ok = JS_GetUCProperty(aCx, JSVAL_TO_OBJECT(aValue),
reinterpret_cast<const jschar*>(keyPath.get()),
keyPath.Length(), &prop);
NS_ENSURE_TRUE(ok, NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR);
Key key;
rv = key.SetFromJSVal(aCx, prop);
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(PRInt32 aCount)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (aCount < 1) {
return NS_ERROR_TYPE_ERR;
}
Key key;
return ContinueInternal(key, aCount);
}
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.
nsCAutoString 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 (PRInt32 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)
{
// Remove cached stuff from last time.
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;
*aVal = JSVAL_VOID;
}
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();
nsresult rv = WrapNative(aCx, mCursor, aVal);
NS_ENSURE_SUCCESS(rv, rv);
}
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->Manager(), 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->Manager(), mCloneReadInfo);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
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