Context.h

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/* ========================================================================
 * Copyright (c) 2006,
 * Institute for Computer Graphics and Vision
 * Graz University of Technology
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * Neither the name of the Graz University of Technology nor the names of
 * its contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ========================================================================
 * PROJECT: OpenTracker
 * ======================================================================== */
/* ======================================================================= */

#ifndef _CONTEXT_H
#define _CONTEXT_H

#include "../dllinclude.h"

#include "Node.h"
#include "Module.h"
#include "NodeFactoryContainer.h"
#include "VideoUser.h"

class ACE_Thread_Mutex;
class ACE_Condition_Thread_Mutex;



namespace ot {

    typedef std::map<std::string, Module *> ModuleMap;

    class OPENTRACKER_API Context
    {

    protected:
        ModuleMap modules;
        Node::Ptr rootNode;
        NodeFactoryContainer factory;
        bool cleanUp;
        bool stoploopflag;
        std::string file;
        std::vector<std::string> directories;
        std::string rootNamespace;

        VideoUserVector videoUsers;

        ACE_Thread_Mutex* _mutex;
        ACE_Thread_Mutex* _havedatamutex;
        ACE_Condition_Thread_Mutex* _havedatacondition;
    public:
        void lock();
        void unlock();
        void waitDataSignal();
        void dataSignal();
        void dataBroadcast();
        // Methods
    public:

        Context( int init = 0 );
        virtual ~Context();

        void addFactory(NodeFactory& newfactory);
        void removeFactory(NodeFactory & factory);

        void addModule(const std::string & name, Module & module);

        Module * getModule(const std::string & name);

        void removeModule(Module & module);

        Node * createNode(const std::string & name, StringTable & attributes);

        Node * getRootNode();

        Node * findNode(const std::string & id);

        void parseConfiguration(const std::string& filename);
        void parseConfigurationString(const char* xmlstring);

        void start();

        void pushEvents();

        void pullEvents();

                int loopOnce();

        void run();

        void runAtRate(double rate);

        void runOnDemand();

        int stop();

        void stopLoop();

        void close();

        void addDirectoryFirst( const std::string & dir );

        void addDirectoryLast( const std::string & dir );

        void removeDirectory( const std::string & dir );

        bool findFile( const std::string & filename, std::string & fullname );

        const std::string & getRootNamespace();

                const std::string& getConfigFile();
        void newVideoFrame(const unsigned char* image, int width, int height, PIXEL_FORMAT format);


        void registerVideoUser(VideoUser* videoUser);


        void unregisterVideoUser(VideoUser* videoUser);

        void copyFrom( Context & other);
        void addNode(std::string parentid, Node * newnode);
        void removeSubtree(std::string nodeid);
        void removeNode(std::string nodeid);
        void replaceNode(std::string nodeid, Node * newnode);

        Module * getModuleFromNode(const Node * node);
        Module * getModuleFromNodeType(std::string nodename);
        
        bool isConfigured();

    friend class ConfigurationParser;
    };

    // returns the namespace of the root node
    inline const std::string & Context::getRootNamespace()
    {
        return rootNamespace;
    }



} // namespace ot

#endif

/*
 * ------------------------------------------------------------
 *   End of Context.cxx
 * ------------------------------------------------------------
 *   Automatic Emacs configuration follows.
 *   Local Variables:
 *   mode:c++
 *   c-basic-offset: 4
 *   eval: (c-set-offset 'substatement-open 0)
 *   eval: (c-set-offset 'case-label '+)
 *   eval: (c-set-offset 'statement 'c-lineup-runin-statements)
 *   eval: (setq indent-tabs-mode nil)
 *   End:
 * ------------------------------------------------------------
 */

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