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Diffstat (limited to 'src/partition/jsondbquery.h')
| -rw-r--r-- | src/partition/jsondbquery.h | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/src/partition/jsondbquery.h b/src/partition/jsondbquery.h new file mode 100644 index 00000000..324f9ee1 --- /dev/null +++ b/src/partition/jsondbquery.h @@ -0,0 +1,201 @@ +/**************************************************************************** +** +** 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 |