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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "IDBDatabaseBackendImpl.h"
#include "DOMStringList.h"
#include "IDBDatabaseException.h"
#include "IDBObjectStoreBackendImpl.h"
#include "IDBTransactionCoordinator.h"
#include "SQLiteDatabase.h"
#include "SQLiteStatement.h"
#include "SQLiteTransaction.h"
#if ENABLE(INDEXED_DATABASE)
namespace WebCore {
static bool extractMetaData(SQLiteDatabase* sqliteDatabase, const String& expectedName, String& foundDescription, String& foundVersion)
{
SQLiteStatement metaDataQuery(*sqliteDatabase, "SELECT name, description, version FROM MetaData");
if (metaDataQuery.prepare() != SQLResultOk || metaDataQuery.step() != SQLResultRow)
return false;
if (metaDataQuery.getColumnText(0) != expectedName) {
LOG_ERROR("Name in MetaData (%s) doesn't match expected (%s) for IndexedDB", metaDataQuery.getColumnText(0).utf8().data(), expectedName.utf8().data());
ASSERT_NOT_REACHED();
}
foundDescription = metaDataQuery.getColumnText(1);
foundVersion = metaDataQuery.getColumnText(2);
if (metaDataQuery.step() == SQLResultRow) {
LOG_ERROR("More than one row found in MetaData table");
ASSERT_NOT_REACHED();
}
return true;
}
static bool setMetaData(SQLiteDatabase* sqliteDatabase, const String& name, const String& description, const String& version)
{
ASSERT(!name.isNull() && !description.isNull() && !version.isNull());
sqliteDatabase->executeCommand("DELETE FROM MetaData");
SQLiteStatement insert(*sqliteDatabase, "INSERT INTO MetaData (name, description, version) VALUES (?, ?, ?)");
if (insert.prepare() != SQLResultOk) {
LOG_ERROR("Failed to prepare MetaData insert statement for IndexedDB");
return false;
}
insert.bindText(1, name);
insert.bindText(2, description);
insert.bindText(3, version);
if (insert.step() != SQLResultDone) {
LOG_ERROR("Failed to insert row into MetaData for IndexedDB");
return false;
}
// FIXME: Should we assert there's only one row?
return true;
}
IDBDatabaseBackendImpl::IDBDatabaseBackendImpl(const String& name, const String& description, PassOwnPtr<SQLiteDatabase> sqliteDatabase, IDBTransactionCoordinator* coordinator)
: m_sqliteDatabase(sqliteDatabase)
, m_name(name)
, m_version("")
, m_transactionCoordinator(coordinator)
{
ASSERT(!m_name.isNull());
// FIXME: The spec is in flux about how to handle description. Sync it up once a final decision is made.
String foundDescription = "";
bool result = extractMetaData(m_sqliteDatabase.get(), m_name, foundDescription, m_version);
m_description = description.isNull() ? foundDescription : description;
if (!result || m_description != foundDescription)
setMetaData(m_sqliteDatabase.get(), m_name, m_description, m_version);
loadObjectStores();
}
IDBDatabaseBackendImpl::~IDBDatabaseBackendImpl()
{
}
void IDBDatabaseBackendImpl::setDescription(const String& description)
{
if (description == m_description)
return;
m_description = description;
setMetaData(m_sqliteDatabase.get(), m_name, m_description, m_version);
}
PassRefPtr<DOMStringList> IDBDatabaseBackendImpl::objectStores() const
{
RefPtr<DOMStringList> objectStoreNames = DOMStringList::create();
for (ObjectStoreMap::const_iterator it = m_objectStores.begin(); it != m_objectStores.end(); ++it)
objectStoreNames->append(it->first);
return objectStoreNames.release();
}
void IDBDatabaseBackendImpl::createObjectStore(const String& name, const String& keyPath, bool autoIncrement, PassRefPtr<IDBCallbacks> callbacks)
{
if (m_objectStores.contains(name)) {
callbacks->onError(IDBDatabaseError::create(IDBDatabaseException::CONSTRAINT_ERR, "An objectStore with that name already exists."));
return;
}
SQLiteStatement insert(sqliteDatabase(), "INSERT INTO ObjectStores (name, keyPath, doAutoIncrement) VALUES (?, ?, ?)");
bool ok = insert.prepare() == SQLResultOk;
ASSERT_UNUSED(ok, ok); // FIXME: Better error handling.
insert.bindText(1, name);
insert.bindText(2, keyPath);
insert.bindInt(3, static_cast<int>(autoIncrement));
ok = insert.step() == SQLResultDone;
ASSERT_UNUSED(ok, ok); // FIXME: Better error handling.
int64_t id = sqliteDatabase().lastInsertRowID();
RefPtr<IDBObjectStoreBackendImpl> objectStore = IDBObjectStoreBackendImpl::create(this, id, name, keyPath, autoIncrement);
ASSERT(objectStore->name() == name);
m_objectStores.set(name, objectStore);
callbacks->onSuccess(objectStore.get());
}
PassRefPtr<IDBObjectStoreBackendInterface> IDBDatabaseBackendImpl::objectStore(const String& name, unsigned short mode)
{
// FIXME: If no transaction is running, this should implicitly start one.
ASSERT_UNUSED(mode, !mode); // FIXME: Handle non-standard modes.
return m_objectStores.get(name);
}
static void doDelete(SQLiteDatabase& db, const char* sql, int64_t id)
{
SQLiteStatement deleteQuery(db, sql);
bool ok = deleteQuery.prepare() == SQLResultOk;
ASSERT_UNUSED(ok, ok); // FIXME: Better error handling.
deleteQuery.bindInt64(1, id);
ok = deleteQuery.step() == SQLResultDone;
ASSERT_UNUSED(ok, ok); // FIXME: Better error handling.
}
void IDBDatabaseBackendImpl::removeObjectStore(const String& name, PassRefPtr<IDBCallbacks> callbacks)
{
RefPtr<IDBObjectStoreBackendImpl> objectStore = m_objectStores.get(name);
if (!objectStore) {
callbacks->onError(IDBDatabaseError::create(IDBDatabaseException::NOT_FOUND_ERR, "No objectStore with that name exists."));
return;
}
SQLiteTransaction transaction(sqliteDatabase());
transaction.begin();
doDelete(sqliteDatabase(), "DELETE FROM ObjectStores WHERE id = ?", objectStore->id());
doDelete(sqliteDatabase(), "DELETE FROM ObjectStoreData WHERE objectStoreId = ?", objectStore->id());
doDelete(sqliteDatabase(), "DELETE FROM IndexData WHERE indexId IN (SELECT id FROM Indexes WHERE objectStoreId = ?)", objectStore->id());
doDelete(sqliteDatabase(), "DELETE FROM Indexes WHERE objectStoreId = ?", objectStore->id());
transaction.commit();
m_objectStores.remove(name);
callbacks->onSuccess();
}
void IDBDatabaseBackendImpl::setVersion(const String& version, PassRefPtr<IDBCallbacks> callbacks)
{
m_version = version;
setMetaData(m_sqliteDatabase.get(), m_name, m_description, m_version);
callbacks->onSuccess();
}
PassRefPtr<IDBTransactionBackendInterface> IDBDatabaseBackendImpl::transaction(DOMStringList* objectStores, unsigned short mode, unsigned long timeout)
{
return m_transactionCoordinator->createTransaction(objectStores, mode, timeout, this);
}
void IDBDatabaseBackendImpl::loadObjectStores()
{
SQLiteStatement objectStoresQuery(sqliteDatabase(), "SELECT id, name, keyPath, doAutoIncrement FROM ObjectStores");
bool ok = objectStoresQuery.prepare() == SQLResultOk;
ASSERT_UNUSED(ok, ok); // FIXME: Better error handling?
while (objectStoresQuery.step() == SQLResultRow) {
int64_t id = objectStoresQuery.getColumnInt64(0);
String name = objectStoresQuery.getColumnText(1);
String keyPath = objectStoresQuery.getColumnText(2);
bool autoIncrement = !!objectStoresQuery.getColumnInt(3);
m_objectStores.set(name, IDBObjectStoreBackendImpl::create(this, id, name, keyPath, autoIncrement));
}
}
} // namespace WebCore
#endif // ENABLE(INDEXED_DATABASE)
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