ibrdtn/ibrdtn/data/ExtensionBlock.h

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/*
 * ExtensionBlock.h
 *
 *  Created on: 26.05.2010
 *      Author: morgenro
 */

#ifndef EXTENSIONBLOCK_H_
#define EXTENSIONBLOCK_H_

#include "ibrdtn/data/Block.h"
#include <ibrcommon/data/BLOB.h>
#include <map>

namespace dtn
{
        namespace data
        {
                class ExtensionBlock : public Block
                {
                public:
                        class Factory
                        {
                        public:
                                virtual dtn::data::Block* create() = 0;

                                static Factory& get(char type) throw (ibrcommon::Exception);

                        protected:
                                Factory(char type);
                                virtual ~Factory();

                        private:
                                char _type;
                        };

                        ExtensionBlock();
                        ExtensionBlock(ibrcommon::BLOB::Reference ref);
                        virtual ~ExtensionBlock();

                        ibrcommon::BLOB::Reference getBLOB() const;

                        virtual size_t getLength() const;
                        virtual std::ostream &serialize(std::ostream &stream, size_t &length) const;
                        virtual std::istream &deserialize(std::istream &stream, const size_t length);

                protected:
                        class FactoryList
                        {
                        public:
                                FactoryList();
                                virtual ~FactoryList();

                                Factory& get(char type) throw (ibrcommon::Exception);
                                void add(char type, Factory *f) throw (ibrcommon::Exception);
                                void remove(char type);

                                static void initialize();

                        private:
                                std::map<char, Factory*> fmap;
                        };

                        static FactoryList *factories;

                private:
                        ibrcommon::BLOB::Reference _blobref;
                };
        }
}

#endif /* EXTENSIONBLOCK_H_ */