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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtAddOn.JsonDb module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef JSONDB_QUERY_H
#define JSONDB_QUERY_H
#include <QDebug>
#include <QObject>
#include <QHash>
#include <QStringList>
#include <QVariant>
#include "jsondberrors.h"
#include <qjsonarray.h>
#include <qjsonobject.h>
#include <qjsonvalue.h>
#include "jsondbobject.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE_JSONDB_PARTITION
class JsonDbPartition;
class Q_JSONDB_PARTITION_EXPORT JsonDbQueryTokenizer {
public:
JsonDbQueryTokenizer(QString input);
QString pop();
QString popIdentifier();
QString peek();
void push(QString token) {
if (!mNextToken.isEmpty())
qCritical() << Q_FUNC_INFO << "Cannot push multiple tokens";
mNextToken = token;
}
protected:
QString getNextToken();
static const char* sTokens[];
private:
QString mInput;
int mPos;
QString mNextToken;
};
class JsonDbQuery;
class Q_JSONDB_PARTITION_EXPORT QueryTerm {
public:
QueryTerm(const JsonDbQuery *query);
~QueryTerm();
QString propertyName() const { return mPropertyName; }
void setPropertyName(QString propertyName) { mPropertyName = propertyName; mFieldPath = propertyName.split('.'); }
const QStringList &fieldPath() const { return mFieldPath; }
QString op() const { return mOp; }
void setOp(QString op) { mOp = op; }
QString joinField() const { return mJoinField; }
void setJoinField(QString joinField) {
mJoinField = joinField;
if (!joinField.isEmpty()) {
QStringList joinFields = joinField.split("->");
mJoinPaths.resize(joinFields.size());
for (int j = 0; j < joinFields.size(); j++)
mJoinPaths[j] = joinFields[j].split('.');
}
}
const QVector<QStringList> &joinPaths() const { return mJoinPaths; }
QString variable() const { return mVariable; }
void setVariable(const QString variable) { mVariable = variable; }
QString propertyVariable() const { return mPropertyVariable; }
void setPropertyVariable(const QString variable) { mPropertyVariable = variable; }
QJsonValue value() const;
void setValue(const QJsonValue &v) { mValue = v; }
QRegExp ®Exp() { return mRegExp; }
void setRegExp(const QRegExp ®Exp) { mRegExp = regExp; }
const QRegExp ®ExpConst() const { return mRegExp; }
private:
const JsonDbQuery *mQuery;
QString mVariable;
QString mPropertyName;
QString mPropertyVariable;
QStringList mFieldPath;
QString mOp;
QString mJoinField;
QVector<QStringList> mJoinPaths;
QJsonValue mValue;
QRegExp mRegExp;
};
class OrQueryTerm {
public:
OrQueryTerm();
OrQueryTerm(const QueryTerm &term);
~OrQueryTerm();
const QList<QueryTerm> &terms() const { return mTerms; }
void addTerm(const QueryTerm &term) { mTerms.append(term); }
QList<QString> propertyNames() const;
QList<QString> findUnindexablePropertyNames() const;
private:
QList<QueryTerm> mTerms;
};
class Q_JSONDB_PARTITION_EXPORT OrderTerm {
public:
OrderTerm();
~OrderTerm();
bool ascending;
QString propertyName;
};
class Q_JSONDB_PARTITION_EXPORT JsonDbQuery {
public:
JsonDbQuery() { }
JsonDbQuery(const QList<OrQueryTerm> &qt, const QList<OrderTerm> &ot);
~JsonDbQuery();
QList<OrQueryTerm> queryTerms;
QList<OrderTerm> orderTerms;
QString query;
QStringList mapExpressionList;
QStringList mapKeyList;
QStringList queryExplanation;
QString mAggregateOperation;
QSet<QString> matchedTypes() const { return mMatchedTypes; }
QJsonValue binding(const QString variable) const { return mBindings.value(variable); }
void bind(QString variable, QJsonValue &binding) { mBindings[variable] = binding; }
bool match(const JsonDbObject &object, QHash<QString, JsonDbObject> *objectCache, JsonDbPartition *partition = 0) const;
static QJsonValue parseJsonLiteral(const QString &json, QueryTerm *term, const QJsonObject &bindings, bool *ok);
static JsonDbQuery *parse(const QString &query, const QJsonObject &bindings = QJsonObject());
private:
QSet<QString> mMatchedTypes;
QMap<QString,QJsonValue> mBindings;
Q_DISABLE_COPY(JsonDbQuery);
};
typedef QList<QJsonValue> QJsonValueList;
typedef QList<QJsonObject> QJsonObjectList;
typedef QList<JsonDbObject> JsonDbObjectList;
class Q_JSONDB_PARTITION_EXPORT JsonDbQueryResult {
public:
JsonDbObjectList data;
QJsonValue length;
QJsonValue offset;
QJsonValue explanation;
QJsonValue sortKeys;
QJsonValue state;
QJsonValue error; // { code: int, message: string }
QVariantMap toVariantMap() const;
static JsonDbQueryResult makeErrorResponse(JsonDbError::ErrorCode, const QString&, bool silent=false);
};
QT_END_NAMESPACE_JSONDB_PARTITION
QT_END_HEADER
#endif // JSONDB_QUERY_H
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