src/core/qgssearchstring.h

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/***************************************************************************
                            qgssearchstring.h
          interface for parsing and evaluation of search strings
                          --------------------
    begin                : 2005-07-26
    copyright            : (C) 2005 by Martin Dobias
    email                : won.der at centrum.sk
***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
/* $Id$ */

#ifndef QGSSEARCHSTRING_H
#define QGSSEARCHSTRING_H

#include <QString>

class QgsSearchTreeNode;

class CORE_EXPORT QgsSearchString
{
  public:
    QgsSearchString();

    QgsSearchString( const QString & str );

    QgsSearchString( const QgsSearchString& str );

    ~QgsSearchString();

    QgsSearchString& operator=( const QgsSearchString& str );

    bool setString( QString str );

    /* copies tree and makes search string for it
       on success returns true and sets member variables to the new values */
    bool setTree( QgsSearchTreeNode* tree );

    QgsSearchTreeNode* tree() { return mTree; }
    QString string() { return mString; }

    const QString& parserErrorMsg() { return mParserErrorMsg; }

    bool isEmpty();

    void clear();

  private:
    QgsSearchTreeNode*    mTree;
    QString               mString;

    QString               mParserErrorMsg;
};

#endif