StringMessageBuilder.h

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/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * StringMessageBuilder.h
 * Builds a Message object from a list of strings & a Descriptor.
 * Copyright (C) 2011 Simon Newton
 */

#ifndef INCLUDE_OLA_RDM_STRINGMESSAGEBUILDER_H_
#define INCLUDE_OLA_RDM_STRINGMESSAGEBUILDER_H_

#include <ola/messaging/DescriptorVisitor.h>
#include <stack>
#include <string>
#include <vector>

namespace ola {

namespace messaging {
 class Descriptor;
 class MessageFieldInterface;
 class Message;
}

namespace rdm {

using std::string;
using std::vector;

class StringMessageBuilder: public ola::messaging::FieldDescriptorVisitor {
 public:
 StringMessageBuilder();
 ~StringMessageBuilder();

 // we handle decending into groups ourself
 bool Descend() const { return false; }
 const ola::messaging::Message *GetMessage(
 const vector<string> &inputs,
 const class ola::messaging::Descriptor*);
 const string GetError() const { return m_error_string; }

 void Visit(const ola::messaging::BoolFieldDescriptor*);
 void Visit(const ola::messaging::IPV4FieldDescriptor*);
 void Visit(const ola::messaging::UIDFieldDescriptor*);
 void Visit(const ola::messaging::StringFieldDescriptor*);
 void Visit(const ola::messaging::UInt8FieldDescriptor*);
 void Visit(const ola::messaging::UInt16FieldDescriptor*);
 void Visit(const ola::messaging::UInt32FieldDescriptor*);
 void Visit(const ola::messaging::Int8FieldDescriptor*);
 void Visit(const ola::messaging::Int16FieldDescriptor*);
 void Visit(const ola::messaging::Int32FieldDescriptor*);
 void Visit(const ola::messaging::FieldDescriptorGroup*);
 void PostVisit(const ola::messaging::FieldDescriptorGroup*);

 private:
 vector<string> m_inputs;
 std::stack<vector<const ola::messaging::MessageFieldInterface*> > m_groups;
 unsigned int m_offset, m_input_size, m_group_instance_count;
 bool m_error;
 string m_error_string;

 bool StopParsing() const;
 void SetError(const string &error);

 template<typename type>
 void VisitInt(const ola::messaging::IntegerFieldDescriptor<type> *);

 void InitVars(const vector<string> &inputs);
 void CleanUpVector();
};
} // namespace rdm
} // namespace ola
#endif // INCLUDE_OLA_RDM_STRINGMESSAGEBUILDER_H_