node.h

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/**********************************************************//**
 **
 ** @file data/node.h
 **
 ** Copyright (C) 2012  Xpace, LLC.  All rights reserved
 **
 ** www.xpace.net
 **
 **************************************************************/

#ifndef XPACE_NODE_H
#define XPACE_NODE_H

namespace Xpace
{
  struct internalDataType
  {
    enum
    {
      dt_int,                 // int64, BytesRef
      dt_float,               // DecimalFloat
      dt_string8,             // BytesRef  TODO: rawString8
      dt_string16,            // Ref<utf16_t>  TODO: rawString16
      dt_bytes                // BytesRef
    } type;

    size_t size;
  };

  // a low-level data node, location and contents
  template<typename LOC, typename T>
  struct Node
  {
    LOC loc;
    T   data;
  };

  template<typename LOC>
  class forEachNode
  {
  public:
    virtual ~forEachNode
      ()
    = 0;

    /// @return true to continue, false to stop
    bool operator()
      (const Node<LOC, int64>&)
    {
      return false;
    }
    bool operator()
      (const Node<LOC, BytesRef>&)
    {
      return false;
    }
    bool operator()
      (const Node<LOC, DecimalFloat>&)
    {
      return false;
    }
    bool operator()
      (const Node<LOC, Ref<utf16_t> >&)
    {
      return false;
    }

  protected:
    forEachNode
      ()
    {
    }
  };

  inline
  forEachNode::~forEachNode
    ()
  {
  }

  class TranslateNode
  {
  public: 
    ~TranslateNode
      ()
    {
    }

    static TranslateNode* create
      (const Configuration& config);

    // the output type of this translator
    virtual internalDataType getType
      ()
      const
    = 0;   
  };
}