script_object_msgpack_source.h

/**
 * @file
 * Declares ScriptObjectMsgpackSourceParseException and ScriptObjectMsgpackSource
 * 
 * @internal
 *  This file is part of libscriptobject.
 *
 *  libscriptobject 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.
 *
 *  libscriptobject 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 libscriptobject.  If not, see <http://www.gnu.org/licenses/>.
**/

#ifndef RS_LIBSCRIPTOBJECT_SCRIPT_OBJECT_MSGPACK_SOURCE_H
#define RS_LIBSCRIPTOBJECT_SCRIPT_OBJECT_MSGPACK_SOURCE_H

#include <string>

#include "script_object_source.h"
#include "script_object_exceptions.h"

#include "msgpack.hpp"

namespace rs {
namespace scriptobject {

/**
 * An exception thrown when the msgpack parser encounters an error in the input stream
 * @see ScriptObjectException
 * @ingroup Exceptions
 */
class ScriptObjectMsgpackSourceParseException : public ScriptObjectException {
public:    
    ScriptObjectMsgpackSourceParseException(const char* msg) : msg_(msg) {}
            
    virtual const char* what() const noexcept override {
        return msg_.c_str();
    }
    
private:
    const std::string msg_;
};

/**
 * A source for a scriptable object, read from a msgpack character stream
 * @see ScriptObject
 * @see ScriptObjectFactory
 */
class ScriptObjectMsgpackSource final : public rs::scriptobject::ScriptObjectSource {
public:
    
    ScriptObjectMsgpackSource(const char* data, std::size_t length);
    ScriptObjectMsgpackSource(msgpack::object_kv* obj, unsigned count);

    virtual unsigned count() const override;
    virtual rs::scriptobject::ScriptObjectType type(int index) const override;
    virtual const char* name(int index) const override;    
    virtual unsigned length(int index) const override;
    
    virtual bool getBoolean(int index) const override;
    virtual std::int32_t getInt32(int index) const override;
    virtual std::uint32_t getUInt32(int index) const override;
    virtual std::int64_t getInt64(int index) const override;
    virtual std::uint64_t getUInt64(int index) const override;
    virtual double getDouble(int index) const override;
    virtual const char* getString(int index) const override;
    virtual int getStringLength(int index) const override;
    virtual const rs::scriptobject::ScriptObjectPtr getObject(int index) const override;
    virtual const rs::scriptobject::ScriptArrayPtr getArray(int index) const override;
    
private:        
        
    msgpack::unpacked result_;
    msgpack::object_kv* map_;
    unsigned count_;
};

}}

#endif	/* RS_LIBSCRIPTOBJECT_SCRIPT_OBJECT_MSGPACK_SOURCE_H */