XmlReader.h

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/*
* This file is part of ArmarX.
*
* ArmarX is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* ArmarX is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @package    ArmarX::
* @author     Christian Mandery (christian.mandery at kit dot edu)
* @date       2014
* @copyright  http://www.gnu.org/licenses/gpl-2.0.txt
*             GNU General Public License
*/
 
#pragma once
 
#include "../../StatechartViewerPlugin/model/State.h"
 
#include <ArmarXCore/core/IceManager.h>
#include <ArmarXCore/core/exceptions/Exception.h>
#include <ArmarXCore/core/rapidxml/rapidxml.hpp>
#include <ArmarXCore/observers/variant/VariantInfo.h>
 
namespace armarx::statechartio
{
    /**
     * @class XmlReader
     * @brief XML reader class used to build State objects from XML representations.
     */
    class XmlReader
    {
    public:
        /**
         * Creates a new XmlReader. The ICE communicator is required for deserialization of parameter default values from JSON.
         * @param iceCommunicator Ice communicator.
         */
        XmlReader(Ice::CommunicatorPtr iceCommunicator, VariantInfoPtr info);
 
        /**
         * Parses the given XML document and builds a State object (that can be retrieved using getRootState()).
         * The State object will not contain references to other states until addReferences() has been called.
         * @param xmlString XML document to parse.
         */
        void parseXml(const QString& xmlString);
 
        /**
        * Returns the State object created by this XML reader.
        * @return State object.
        */
        armarx::statechartmodel::StatePtr getLoadedState() const
        {
            return loadedState;
        }
 
    private:
        QString readDescription(rapidxml::xml_node<>* rootNode) const;
        armarx::statechartmodel::EventList readEventList(rapidxml::xml_node<>* eventListNode) const;
        armarx::statechartmodel::StateParameterMap readParameterList(rapidxml::xml_node<>* parameterListNode) const;
        armarx::statechartmodel::ParameterMappingList readParameterMappingList(rapidxml::xml_node<>* parameterMappingListNode) const;
        void readStartState(rapidxml::xml_node<>* startStateNode) const;
        armarx::statechartmodel::StateInstanceMap readSubstateList(rapidxml::xml_node<>* substateListNode) const;
        armarx::statechartmodel::TransitionList readTransitionList(rapidxml::xml_node<>* transitionListNode) const;
 
        armarx::statechartmodel::StateInstancePtr getSubstateByInstanceName(const QString& name) const;
 
        QString readAttribute(rapidxml::xml_node<>* node, const QString& attributeName, bool required = true) const;
 
        Ice::CommunicatorPtr iceCommunicator;
        VariantInfoPtr info;
        armarx::statechartmodel::StatePtr loadedState;
        bool hasSubstateByInstanceName(const QString& name) const;
    };
 
    /**
     * @class XmlNodeIterator
     * @brief Iterate over all child nodes with a certain name of a given XML node.
     */
    class XmlNodeIterator
    {
    public:
        XmlNodeIterator(rapidxml::xml_node<>* parentNode, const QString& nodeName, bool required);
 
        rapidxml::xml_node<>* getNext();
 
    private:
        rapidxml::xml_node<>* parentNode, *currentChildNode;
        const QString& nodeName;
        const QByteArray nodeNameUtf8;
        bool required;
    };
}
 
namespace armarx::exceptions::local
{
    class XmlReaderException : public LocalException
    {
    public:
        XmlReaderException(const std::string& errorText) : LocalException("Parsing the XML file failed: " + errorText) {}
        std::string name() const override
        {
            return "armarx::exceptions::local::XmlReaderException";
        }
    };
}