00001 /*************************************************************************** 00002 ** 00003 ** This file is part of QGpCoreTools. 00004 ** 00005 ** This library is free software; you can redistribute it and/or 00006 ** modify it under the terms of the GNU Lesser General Public 00007 ** License as published by the Free Software Foundation; either 00008 ** version 2.1 of the License, or (at your option) any later version. 00009 ** 00010 ** This file is distributed in the hope that it will be useful, but WITHOUT 00011 ** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00012 ** FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 00013 ** License for more details. 00014 ** 00015 ** You should have received a copy of the GNU Lesser General Public 00016 ** License along with this library; if not, write to the Free Software 00017 ** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00018 ** 00019 ** See http://www.geopsy.org for more information. 00020 ** 00021 ** Created : 2007-04-20 00022 ** Authors : 00023 ** Marc Wathelet 00024 ** Marc Wathelet (LGIT, Grenoble, France) 00025 ** 00026 ***************************************************************************/ 00027 00028 #ifndef EXPRESSIONCONTEXT_H 00029 #define EXPRESSIONCONTEXT_H 00030 00031 #include <QtCore> 00032 00033 #include "QGpCoreToolsDLLExport.h" 00034 00035 namespace QGpCoreTools { 00036 00037 class ExpressionStorage; 00038 class ExpressionAction; 00039 00040 class QGPCORETOOLS_EXPORT ExpressionContext 00041 { 00042 public: 00043 ExpressionContext(ExpressionContext * parent=0) {_parent=parent;} 00044 virtual ~ExpressionContext(); 00045 00046 void addVariable(const QString& name, const QVariant& val) {addVariable(name, "0", val);} 00047 void addVariable(const QString& name, const QString& index, const QVariant& val); 00048 int addVariable(const QString& name, ExpressionStorage * var); 00049 00050 QStringList variables() const; 00051 bool isValidVariable(const QString& name) const; 00052 QVariant variableValue(const QString& name, const QString& index=QString::null) const; 00053 ExpressionStorage * variable(int varIndex) const {return _varValues[varIndex];} 00054 00055 virtual QStringList functions() const; 00056 virtual bool isValidFunction(const QString& name) const; 00057 virtual QVariant functionValue(const QString& name, const QVector<ExpressionAction *>& args) const; 00058 private: 00059 ExpressionContext * _parent; 00060 QMap<QString, int> _varNames; 00061 QVector<ExpressionStorage *> _varValues; 00062 }; 00063 00064 } // namespace QGpCoreTools 00065 00066 #endif // EXPRESSIONCONTEXT_H
