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#pragma once
#include "sink_export.h"
#include <string>
#include <functional>
#include <QString>
#include "storage.h"
#include "log.h"
/**
* An index for value pairs.
*/
class SINK_EXPORT Index
{
public:
enum ErrorCodes
{
IndexNotAvailable = -1
};
class Error
{
public:
Error(const QByteArray &s, int c, const QByteArray &m) : store(s), message(m), code(c)
{
}
QByteArray store;
QByteArray message;
int code;
};
Index(const QString &storageRoot, const QString &dbName, const QString &indexName, Sink::Storage::DataStore::AccessMode mode = Sink::Storage::DataStore::ReadOnly);
Index(const QString &storageRoot, const QString &name, Sink::Storage::DataStore::AccessMode mode = Sink::Storage::DataStore::ReadOnly);
Index(const QString &storageRoot, const Sink::Storage::DbLayout &layout, Sink::Storage::DataStore::AccessMode mode = Sink::Storage::DataStore::ReadOnly);
Index(const QByteArray &name, Sink::Storage::DataStore::Transaction &);
void add(const QByteArray &key, const QByteArray &value);
void remove(const QByteArray &key, const QByteArray &value);
void lookup(const QByteArray &key, const std::function<void(const QByteArray &value)> &resultHandler, const std::function<void(const Error &error)> &errorHandler,
bool matchSubStringKeys = false);
QByteArray lookup(const QByteArray &key);
void rangeLookup(const QByteArray &lowerBound, const QByteArray &upperBound,
const std::function<void(const QByteArray &value)> &resultHandler,
const std::function<void(const Error &error)> &errorHandler);
private:
Q_DISABLE_COPY(Index);
Sink::Storage::DataStore::Transaction mTransaction;
Sink::Storage::DataStore::NamedDatabase mDb;
QString mName;
Sink::Log::Context mLogCtx;
};
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