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/*
* Copyright (C) 2011 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.
*/
#ifndef IDBBackingStore_h
#define IDBBackingStore_h
#if ENABLE(INDEXED_DATABASE)
#include "IDBKey.h"
#include "IDBMetadata.h"
#include "IndexedDB.h"
#include "LevelDBTransaction.h"
#include <wtf/OwnPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
class LevelDBComparator;
class LevelDBDatabase;
class LevelDBIterator;
class LevelDBTransaction;
class IDBKey;
class IDBKeyRange;
class SecurityOrigin;
class SharedBuffer;
class LevelDBFactory {
public:
virtual PassOwnPtr<LevelDBDatabase> openLevelDB(const String& fileName, const LevelDBComparator*) = 0;
virtual bool destroyLevelDB(const String& fileName) = 0;
};
class IDBBackingStore : public RefCounted<IDBBackingStore> {
public:
class Transaction;
virtual ~IDBBackingStore();
static PassRefPtr<IDBBackingStore> open(SecurityOrigin*, const String& pathBase, const String& fileIdentifier);
static PassRefPtr<IDBBackingStore> open(SecurityOrigin*, const String& pathBase, const String& fileIdentifier, LevelDBFactory*);
static PassRefPtr<IDBBackingStore> openInMemory(SecurityOrigin*, const String& identifier);
static PassRefPtr<IDBBackingStore> openInMemory(SecurityOrigin*, const String& identifier, LevelDBFactory*);
WeakPtr<IDBBackingStore> createWeakPtr() { return m_weakFactory.createWeakPtr(); }
virtual Vector<String> getDatabaseNames();
virtual bool getIDBDatabaseMetaData(const String& name, IDBDatabaseMetadata*, bool& success) WARN_UNUSED_RETURN;
virtual bool createIDBDatabaseMetaData(const String& name, const String& version, int64_t intVersion, int64_t& rowId);
virtual bool updateIDBDatabaseMetaData(IDBBackingStore::Transaction*, int64_t rowId, const String& version);
virtual bool updateIDBDatabaseIntVersion(IDBBackingStore::Transaction*, int64_t rowId, int64_t intVersion);
virtual bool deleteDatabase(const String& name);
bool getObjectStores(int64_t databaseId, IDBDatabaseMetadata::ObjectStoreMap*) WARN_UNUSED_RETURN;
virtual bool createObjectStore(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, const String& name, const IDBKeyPath&, bool autoIncrement);
virtual bool deleteObjectStore(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId) WARN_UNUSED_RETURN;
class RecordIdentifier {
WTF_MAKE_NONCOPYABLE(RecordIdentifier);
public:
RecordIdentifier(const Vector<char>& primaryKey, int64_t version) : m_primaryKey(primaryKey), m_version(version) { ASSERT(!primaryKey.isEmpty()); }
RecordIdentifier() : m_primaryKey(), m_version(-1) { }
const Vector<char> primaryKey() const { return m_primaryKey; }
int64_t version() const { return m_version; }
void reset(const Vector<char>& primaryKey, int64_t version) { m_primaryKey = primaryKey; m_version = version; }
private:
Vector<char> m_primaryKey; // FIXME: Make it more clear that this is the *encoded* version of the key.
int64_t m_version;
};
virtual bool getRecord(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, const IDBKey&, Vector<char>& record) WARN_UNUSED_RETURN;
virtual bool putRecord(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, const IDBKey&, PassRefPtr<SharedBuffer> value, RecordIdentifier*) WARN_UNUSED_RETURN;
virtual bool clearObjectStore(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId) WARN_UNUSED_RETURN;
virtual bool deleteRecord(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, const RecordIdentifier&) WARN_UNUSED_RETURN;
virtual bool getKeyGeneratorCurrentNumber(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, int64_t& currentNumber) WARN_UNUSED_RETURN;
virtual bool maybeUpdateKeyGeneratorCurrentNumber(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, int64_t newState, bool checkCurrent) WARN_UNUSED_RETURN;
virtual bool keyExistsInObjectStore(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, const IDBKey&, RecordIdentifier* foundRecordIdentifier, bool& found) WARN_UNUSED_RETURN;
virtual bool createIndex(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, int64_t indexId, const String& name, const IDBKeyPath&, bool isUnique, bool isMultiEntry) WARN_UNUSED_RETURN;
virtual bool deleteIndex(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, int64_t indexId) WARN_UNUSED_RETURN;
virtual bool putIndexDataForRecord(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, int64_t indexId, const IDBKey&, const RecordIdentifier&) WARN_UNUSED_RETURN;
virtual bool getPrimaryKeyViaIndex(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, int64_t indexId, const IDBKey&, RefPtr<IDBKey>& primaryKey) WARN_UNUSED_RETURN;
virtual bool keyExistsInIndex(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, int64_t indexId, const IDBKey& indexKey, RefPtr<IDBKey>& foundPrimaryKey, bool& exists) WARN_UNUSED_RETURN;
class Cursor : public RefCounted<Cursor> {
public:
enum IteratorState {
Ready = 0,
Seek
};
struct CursorOptions {
int64_t databaseId;
int64_t objectStoreId;
int64_t indexId;
Vector<char> lowKey;
bool lowOpen;
Vector<char> highKey;
bool highOpen;
bool forward;
bool unique;
};
PassRefPtr<IDBKey> key() const { return m_currentKey; }
bool continueFunction(const IDBKey* = 0, IteratorState = Seek);
bool advance(unsigned long);
bool firstSeek();
virtual PassRefPtr<Cursor> clone() = 0;
virtual PassRefPtr<IDBKey> primaryKey() const { return m_currentKey; }
virtual PassRefPtr<SharedBuffer> value() const = 0;
virtual const RecordIdentifier& recordIdentifier() const { return m_recordIdentifier; }
virtual ~Cursor() { }
virtual bool loadCurrentRow() = 0;
protected:
Cursor(LevelDBTransaction* transaction, const CursorOptions& cursorOptions)
: m_transaction(transaction)
, m_cursorOptions(cursorOptions)
{
}
explicit Cursor(const IDBBackingStore::Cursor* other);
virtual Vector<char> encodeKey(const IDBKey&) = 0;
bool isPastBounds() const;
bool haveEnteredRange() const;
LevelDBTransaction* m_transaction;
const CursorOptions m_cursorOptions;
OwnPtr<LevelDBIterator> m_iterator;
RefPtr<IDBKey> m_currentKey;
IDBBackingStore::RecordIdentifier m_recordIdentifier;
};
virtual PassRefPtr<Cursor> openObjectStoreKeyCursor(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, const IDBKeyRange*, IndexedDB::CursorDirection);
virtual PassRefPtr<Cursor> openObjectStoreCursor(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, const IDBKeyRange*, IndexedDB::CursorDirection);
virtual PassRefPtr<Cursor> openIndexKeyCursor(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, int64_t indexId, const IDBKeyRange*, IndexedDB::CursorDirection);
virtual PassRefPtr<Cursor> openIndexCursor(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, int64_t indexId, const IDBKeyRange*, IndexedDB::CursorDirection);
class Transaction {
public:
explicit Transaction(IDBBackingStore*);
void begin();
bool commit();
void rollback();
void reset() { m_backingStore = 0; m_transaction = 0; }
static LevelDBTransaction* levelDBTransactionFrom(Transaction* transaction)
{
return static_cast<Transaction*>(transaction)->m_transaction.get();
}
private:
IDBBackingStore* m_backingStore;
RefPtr<LevelDBTransaction> m_transaction;
};
protected:
IDBBackingStore(const String& identifier, PassOwnPtr<LevelDBDatabase>, PassOwnPtr<LevelDBComparator>);
// Should only used for mocking.
IDBBackingStore();
private:
static PassRefPtr<IDBBackingStore> create(const String& identifier, PassOwnPtr<LevelDBDatabase>, PassOwnPtr<LevelDBComparator>);
bool findKeyInIndex(IDBBackingStore::Transaction*, int64_t databaseId, int64_t objectStoreId, int64_t indexId, const IDBKey&, Vector<char>& foundEncodedPrimaryKey, bool& found);
bool getIndexes(int64_t databaseId, int64_t objectStoreId, IDBObjectStoreMetadata::IndexMap*) WARN_UNUSED_RETURN;
String m_identifier;
OwnPtr<LevelDBDatabase> m_db;
OwnPtr<LevelDBComparator> m_comparator;
WeakPtrFactory<IDBBackingStore> m_weakFactory;
};
} // namespace WebCore
#endif // ENABLE(INDEXED_DATABASE)
#endif // IDBBackingStore_h
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