propertylistimpl.h

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// @(#)root/reflex:$Name:  $:$Id: PropertyListImpl.h,v 1.3 2006/09/14 13:38:25 roiser Exp $
// Author: Stefan Roiser 2004

// Copyright CERN, CH-1211 Geneva 23, 2004-2006, All rights reserved.
//
// Permission to use, copy, modify, and distribute this software for any
// purpose is hereby granted without fee, provided that this copyright and
// permissions notice appear in all copies and derivatives.
//
// This software is provided "as is" without express or implied warranty.

#ifndef ROOT_Reflex_PropertyListImpl
#define ROOT_Reflex_PropertyListImpl


// Include files
#include "Reflex/Kernel.h"
#include "Reflex/Any.h"
#include <map>
#include <iostream>

namespace ROOT {
   namespace Reflex {

      /**
       * @class PropertyList PropertyList.h Reflex/PropertyList.h
       * @author Stefan Roiser
       * @date 24/11/2003
       * @ingroup Ref
       */
      class RFLX_API PropertyListImpl {

         friend std::ostream & operator << ( std::ostream & s,
                                             const PropertyListImpl & p );
      public:

         /** default constructor */
         PropertyListImpl();


         /** copy constructor */
         PropertyListImpl( const PropertyListImpl & pl);


         /** destructor */
         virtual ~PropertyListImpl();


         /**
          * AddProperty will add a key value pair to the PropertyNth lsit
          * @param key the key of the PropertyNth
          * @param value the value of the PropertyNth (as any object)
          * @return the property key of this property
          */
         size_t AddProperty( const std::string & key,
                             const Any & value );


         /**
          * AddProperty will add a property value pair to the property list
          * @param key the key of the property
          * @param value the value of the property (as any object)
          */
         void AddProperty( size_t key,
                           const Any & value );


         /**
          * AddProperty will add a key value pair to the PropertyNth lsit
          * @param key the key of the PropertyNth
          * @param value the value of the PropertyNth (as any object)
          * @return the property key of this property
          */
         size_t AddProperty( const std::string & key,
                             const char * value );

      
         /**
          * AddProperty will add a key value pair to the property list
          * @param key the key of the property
          * @param value the value of the property (as any object)
          */
         void AddProperty( size_t key,
                           const char * value );

 
         /**
          * ClearProperties will remove all properties from the list
          */
         void ClearProperties();

      
         /**
          * HasProperty will return true if the property list contains a key "key" and 
          * the property for this key is valid
          * @param  key to look for 
          * @return true if a valid property for key exists
          */
         bool HasProperty( const std::string & key ) const;


         /**
          * Key_Begin will return the begin iterator of the key container
          * @return begin iterator of key container
          */
         static StdString_Iterator Key_Begin(); 
         

         /**
          * Key_End will return the end iterator of the key container
          * @return end iterator of key container
          */
         static StdString_Iterator Key_End(); 
         

         /**
          * Key_RBegin will return the rbegin iterator of the key container
          * @return rbegin iterator of key container
          */
         static Reverse_StdString_Iterator Key_RBegin(); 
         

         /**
          * Key_REnd will return the rend iterator of the key container
          * @return rend iterator of key container
          */
         static Reverse_StdString_Iterator Key_REnd(); 


         /**
          * KeysAsString will return a space separated list of all keys
          * @return a list of all currently allocated keys
          */
         static std::string KeysAsString();


         /**
          * KeyAt will return the nth key allocated
          * @param nth key currently allocated
          * @return key as a string
          */
         static const std::string & KeyAt( size_t nth );


         /**
          * Key is the static getter function to return the index of a key. If allocateNew is 
          * set to true a new key will be allocated if it doesn't exist and it's index returned.
          * Otherwise if the key exists the function returns it's index or 0 if no key exists.
          * @param key the key to look for 
          * @param allocateNew allocate a new key if the key doesn't exist
          * @return key index or 0 if no key exists and allocateNew is set to false
          */
         static size_t KeyByName( const std::string & key,
                                  bool allocateNew = false );


         /**
          * KeySize will return the number of currently allocated keys
          * @return number of allocated keys
          */
         static size_t KeySize();


         /**
          * propertyNumString will return the nth PropertyNth as a string if printable
          * @param  key the PropertyNth key
          * @return nth PropertyNth value as string
          */
         std::string PropertyAsString(const std::string & key) const;


         /**
          * PropertyAsString will return the property value as a string if it exists
          * The parameter is a property key which can be aquired with the PropertyKey method.
          * @param key property key to look for
          * @return string representation of the property
          */
         std::string PropertyAsString( size_t key ) const;
        

         /**
          * PropertyKey will return the the key value corresponding to the parameter given
          * @param key the string denoting the key value to lookup
          * @param allocateNew if set to true a new key will be allocated if it doesn't exist
          if set to false and the key doesn't exist the function returns 0
          * @return the key value corresponding to the key param
          */
         size_t PropertyKey( const std::string & key,
                             bool allocateNew = false ) const;


         /**
          * PropertyKeys will return all keys of this PropertyNth list
          * @return all PropertyNth keys
          */
         std::string PropertyKeys() const;


         /**
          * PropertyCount will return the number of properties attached
          * to this item
          * @return number of properties
          */
         size_t PropertyCount() const;


         /**
          * propertyNumValue will return the nth PropertyNth value 
          * @param  key the PropertyNth key
          * @return nth PropertyNth value
          */
         Any & PropertyValue(const std::string & key) const;


         /**
          * PropertyAsString will return the property value as an Any object if it exists
          * The parameter is a property key which can be aquired with the PropertyKey method.
          * @param key property key to look for
          * @return Any representation of the property
          */
         Any & PropertyValue( size_t key ) const;
         

         /**
          * RemoveProperty will remove a key value pair to the PropertyNth lsit
          * @param key the key of the PropertyNth
          */
         void RemoveProperty( const std::string & key );


         /**
          * RemoveProperty will remove a property value from the property list 
          * @param key of the property identified by the property key number
          */
         void RemoveProperty( size_t key );

      private:


         /** 
          * the Property container 
          */
         typedef std::vector< Any > Properties;


         /** the properties of the item 
          * @label properties
          * @link aggregationByValue
          * @clientCardinality 1
          * @supplierCardinality 0..1
          */
         std::vector< Any > * fProperties;

      }; // class PropertyListImpl

      /** 
       * will put the PropertyNth (key and value) on the ostream if printable
       * @param s the reference to the stream
       * @return the stream
       */
      std::ostream & operator << ( std::ostream & s,
                                   const PropertyListImpl & p );

   } //namespace Reflex
} //namespace ROOT


//-------------------------------------------------------------------------------
inline ROOT::Reflex::PropertyListImpl::PropertyListImpl() 
//-------------------------------------------------------------------------------
   : fProperties( 0 ) {}


//-------------------------------------------------------------------------------
inline ROOT::Reflex::PropertyListImpl::PropertyListImpl( const PropertyListImpl & pl ) 
//-------------------------------------------------------------------------------
   : fProperties( pl.fProperties ) {}

  
//-------------------------------------------------------------------------------
inline ROOT::Reflex::PropertyListImpl::~PropertyListImpl() {
//-------------------------------------------------------------------------------
   if ( fProperties ) delete fProperties;
}


//-------------------------------------------------------------------------------
inline size_t ROOT::Reflex::PropertyListImpl::AddProperty( const std::string & key,
                                                           const Any & value ) {
//-------------------------------------------------------------------------------
   size_t k = PropertyKey( key, true );
   AddProperty( k, value);
   return k;
}


//-------------------------------------------------------------------------------
inline void ROOT::Reflex::PropertyListImpl::AddProperty( size_t key,
                                                         const Any & value ) {
//-------------------------------------------------------------------------------
   if ( ! fProperties ) fProperties = new Properties();
   if ( key >= fProperties->size() ) fProperties->resize( key+1, Dummy::Any());
   (*fProperties)[key] = value;
}


//-------------------------------------------------------------------------------
inline size_t ROOT::Reflex::PropertyListImpl::AddProperty( const std::string & key,
                                                           const char* value ) {
//-------------------------------------------------------------------------------
   return AddProperty( key, Any(value) );
}


//-------------------------------------------------------------------------------
inline void ROOT::Reflex::PropertyListImpl::AddProperty( size_t key,
                                                         const char * value ) {
//-------------------------------------------------------------------------------
   AddProperty( key, Any(value));
}


//-------------------------------------------------------------------------------
inline void ROOT::Reflex::PropertyListImpl::RemoveProperty( const std::string & key ) {
//-------------------------------------------------------------------------------
   RemoveProperty( PropertyKey( key ));
}


//-------------------------------------------------------------------------------
inline void ROOT::Reflex::PropertyListImpl::RemoveProperty( size_t key ) {
//------------------------------------------------------------------------------- 
  if ( fProperties ) fProperties->at(key).Swap(Dummy::Any());
}

#endif // ROOT_Reflex_PropertyListImpl