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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtAddOn.JsonDb module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef JSONDB_INDEXQUERY_H
#define JSONDB_INDEXQUERY_H
#include <QJsonValue>
#include <QSet>
#include <QVector>
#include <QStringList>
#include "jsondbpartitionglobal.h"
#include "jsondbobject.h"
#include "jsondbobjectkey.h"
#include "jsondbquery.h"
#include "jsondbbtree.h"
#include "jsondbquery.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE_JSONDB_PARTITION
class JsonDbObjectTable;
class JsonDbOwner;
class JsonDbPartition;
class JsonDbQuery;
class Q_JSONDB_PARTITION_EXPORT JsonDbQueryConstraint {
public:
virtual ~JsonDbQueryConstraint() { }
virtual bool matches(const QJsonValue &value) = 0;
virtual bool sparseMatchPossible() const { return false; }
};
class Q_JSONDB_PARTITION_EXPORT JsonDbIndexQuery
{
protected:
JsonDbIndexQuery(JsonDbPartition *partition, JsonDbObjectTable *table,
const QString &propertyName, const QString &propertyType,
const JsonDbOwner *owner, const JsonDbQuery &query);
public:
static JsonDbIndexQuery *indexQuery(JsonDbPartition *partition, JsonDbObjectTable *table,
const QString &propertyName, const QString &propertyType,
const JsonDbOwner *owner, const JsonDbQuery &query);
virtual ~JsonDbIndexQuery();
JsonDbObjectTable *objectTable() const { return mObjectTable; }
QString partition() const;
void addConstraint(JsonDbQueryConstraint *qc) { mQueryConstraints.append(qc); }
QString propertyName() const { return mPropertyName; }
QString propertyType() const { return mPropertyType; }
void setTypeNames(const QSet<QString> typeNames) { mTypeNames = typeNames; }
void setMin(const QJsonValue &minv);
void setMax(const QJsonValue &maxv);
QString aggregateOperation() const { return mAggregateOperation; }
void setAggregateOperation(QString op) { mAggregateOperation = op; }
void setResultExpressionList(const QStringList &resultExpressionList);
void setResultKeyList(QStringList resultKeyList) { mResultKeyList = resultKeyList; }
JsonDbObject first(); // returns first matching object
JsonDbObject next(); // returns next matching object
JsonDbObject first(QByteArray *key); // returns first matching object and its key
JsonDbObject next(QByteArray *key); // returns next matching object and its keyb
JsonDbObject seek(const QByteArray &key); // returns the object matching key
bool matches(const QJsonValue &value);
QJsonValue fieldValue() const { return mFieldValue; }
const JsonDbQuery &query() const { return mQuery; }
const JsonDbQuery &residualQuery() const { return mResidualQuery; }
void setResidualQuery(const JsonDbQuery &residualQuery)
{ Q_ASSERT(!residualQuery.query.isEmpty()); mResidualQuery = residualQuery; }
virtual quint32 stateNumber() const;
void compileOrQueryTerm(const JsonDbQueryTerm &queryTerm);
JsonDbObject resultObject(const JsonDbObject &object);
static bool lessThan(const QJsonValue &a, const QJsonValue &b);
static bool greaterThan(const QJsonValue &a, const QJsonValue &b);
protected:
virtual bool seekToStart(QJsonValue &fieldValue);
virtual bool seekToStart(QJsonValue &fieldValue, QByteArray *key);
virtual bool seekToNext(QJsonValue &fieldValue);
virtual bool seekToNext(QJsonValue &fieldValue, QByteArray *key);
virtual bool seekTo(const QByteArray &key, QJsonValue &fieldValue);
virtual JsonDbObject currentObjectAndTypeNumber(ObjectKey &objectKey);
protected:
JsonDbPartition *mPartition;
JsonDbObjectTable *mObjectTable;
JsonDbBtree *mBdbIndex;
bool isOwnTransaction;
JsonDbBtree::Transaction *mTxn;
JsonDbBtree::Cursor *mCursor;
const JsonDbOwner *mOwner;
QJsonValue mMin, mMax;
QSet<QString> mTypeNames;
QString mUuid;
QVector<JsonDbQueryConstraint*> mQueryConstraints;
QString mAggregateOperation;
QString mPropertyName;
QString mPropertyType;
QJsonValue mFieldValue; // value of field for the object the cursor is pointing at
bool mSparseMatchPossible;
QHash<QString, JsonDbObject> mObjectCache;
QStringList mResultExpressionList;
QStringList mResultKeyList;
QVector<QVector<QStringList> > mJoinPaths;
JsonDbQuery mQuery;
JsonDbQuery mResidualQuery;
Q_DISABLE_COPY(JsonDbIndexQuery)
};
class JsonDbUuidQuery : public JsonDbIndexQuery {
protected:
JsonDbUuidQuery(JsonDbPartition *partition, JsonDbObjectTable *table,
const QString &propertyName, const JsonDbOwner *owner,
const JsonDbQuery &query);
virtual bool seekToStart(QJsonValue &fieldValue);
virtual bool seekToStart(QJsonValue &fieldValue, QByteArray *key);
virtual bool seekToNext(QJsonValue &fieldValue);
virtual bool seekToNext(QJsonValue &fieldValue, QByteArray *key);
virtual bool seekTo(const QByteArray &key, QJsonValue &fieldValue) { return false; }
virtual JsonDbObject currentObjectAndTypeNumber(ObjectKey &objectKey);
virtual quint32 stateNumber() const;
friend class JsonDbIndexQuery;
};
QT_END_NAMESPACE_JSONDB_PARTITION
QT_END_HEADER
#endif // JSONDB_INDEXQUERY_H
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