JSTDObjectReader.hh

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#ifndef __JLANG__JSTDOBJECTREADER__
#define __JLANG__JSTDOBJECTREADER__
 
#include "JLang/JObjectReader.hh"
#include "JLang/JSTDObjectIterator.hh"
 
 
/**
 * \author mdejong
 */
 
namespace JLANG {}
namespace JPP { using namespace JLANG; }
 
namespace JLANG {
 
 
  /**
   * Implementation of object iteration from STD container.
   *
   * This class implements the JLANG::JRewindableObjectIterator interface.
   */
  template<class T>
  struct JSTDObjectReader :
    public virtual JRewindableObjectIterator<T>,
    public JRewindableObjectReader<T>
  {
    typedef typename JRewindableObjectReader<T>::pointer_type  pointer_type;
 
    /**
     * Default constructor.
     */
    JSTDObjectReader()
    {}
 
 
    /**
     * Constructor.
     *
     * \param  buffer     input buffer
     */
    template<class JContainer_t>
    JSTDObjectReader(JContainer_t& buffer)
    {
      this->reset(new JSTDObjectIterator<typename JContainer_t::iterator>(buffer.begin(), buffer.end()));
    }
 
 
    /**
     * Set input buffer.
     *
     * \param  buffer     input buffer
     */
    template<class JContainer_t>
    void set(JContainer_t& buffer)
    {
      this->reset(new JSTDObjectIterator<typename JContainer_t::iterator>(buffer.begin(), buffer.end()));
    }
 
  protected:
    using JRewindableObjectReader<T>::set;
  };
 
 
  /**
   * Implementation of object iteration from STD container for multiple data types.
   *
   * This class recursively implements the JLANG::JRewindableObjectIterator interface
   * for all data types by deriving from:
   *  - JSTDObjectReader<JHead_t>; and
   *  - JSTDObjectReader<JTail_t>.
   */
  template<class JHead_t, class JTail_t>
  struct JSTDObjectReader< JTypeList<JHead_t, JTail_t> > :
    public virtual JRewindableObjectIterator< JTypeList<JHead_t, JTail_t> >,
    public JSTDObjectReader<JHead_t>,
    public JSTDObjectReader<JTail_t>
  {
    using JSTDObjectReader<JHead_t>::reset;
    using JSTDObjectReader<JTail_t>::reset;
 
 
    /**
     * Set input buffer.
     *
     * \param  buffer     input buffer
     */
    template<class JContainer_t>
    void set(JContainer_t& buffer)
    {
      this->reset(new JSTDObjectIterator<typename JContainer_t::iterator>(buffer.begin(), buffer.end()));
    }
 
 
    /**
     * Rewind.
     */
    virtual void rewind() override 
    {
      JSTDObjectReader<JHead_t>::rewind();
      JSTDObjectReader<JTail_t>::rewind();
    }
 
  protected:
    using JSTDObjectReader<JHead_t>::set;
    using JSTDObjectReader<JTail_t>::set;
  };
 
 
  /**
   * Terminator class of recursive JSTDObjectReader class.
   */
  template<class JHead_t>
  struct JSTDObjectReader< JTypeList<JHead_t, JNullType> > :
    public JSTDObjectReader<JHead_t>
  {};
 
 
  /**
   * Specialisation of object iteration from STD container for constant data.
   */
  template<class T>
  struct JSTDObjectReader<const T> :
    public JRewindableObjectReader<const T>
  {
    typedef typename JRewindableObjectReader<const T>::pointer_type  pointer_type;
 
    /**
     * Default constructor.
     */
    JSTDObjectReader()
    {}
 
 
    /**
     * Constructor.
     *
     * \param  buffer     input buffer
     */
    template<class JContainer_t>
    JSTDObjectReader(const JContainer_t& buffer)
    {
      this->reset(new JSTDObjectIterator<typename JContainer_t::const_iterator>(buffer.begin(), buffer.end()));
    }
 
 
    /**
     * Set input buffer.
     *
     * \param  buffer     buffer buffer
     */
    template<class JContainer_t>
    void set(const JContainer_t& buffer)
    {
      this->reset(new JSTDObjectIterator<typename JContainer_t::const_iterator>(buffer.begin(), buffer.end()));
    }
 
  private:
    using JRewindableObjectReader<const T>::set;
  };
}
 
#endif