| # Gaudi Framework, version v21r8 |

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# KeyedObject.h

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    00001 // $Id $
    00002 #ifndef GAUDIKERNEL_KEYEDOBJECT_H
    00003 #define GAUDIKERNEL_KEYEDOBJECT_H
    00004
    00005 namespace GaudiDict  {
    00006   template <class T> struct KeyedObjectDict;
    00007 }
    00008
    00009 // Framework include files
    00010 #include "GaudiKernel/ContainedObject.h"
    00011 #include "GaudiKernel/KeyedTraits.h"
    00012 #include "GaudiKernel/KeyedContainer.h"
    00013
    00028 template < class KEY >
    00029 class GAUDI_API KeyedObject: public ContainedObject {
    00030   friend struct GaudiDict::KeyedObjectDict<KEY>;
    00031 public:
    00033   typedef KEY key_type;
    00034
    00035 protected:
    00037   typedef typename Containers::key_traits<key_type> traits;
    00039 //#ifdef _WIN32
    00040 //  friend traits;
    00041 //#else
    00042   friend struct Containers::key_traits<key_type>;
    00043 //#endif
    00044
    00046   key_type m_key;
    00048   long     m_refCount;
    00050   bool     m_hasKey;
    00052   unsigned long addRef();
    00054   unsigned long release();
    00059   void setKey(const key_type& key);
    00060 public:
    00062   KeyedObject() : m_refCount(0), m_hasKey(false) {                             }
    00066   KeyedObject(const key_type& kval):m_key(kval),m_refCount(0),m_hasKey(true) { }
    00068   virtual ~KeyedObject();
    00070   const key_type& key() const           {                     return m_key;    }
    00072   bool hasKey()   const                 {                     return m_hasKey; }
    00073   virtual long index() const            {    return traits::identifier(m_key); }
    00075   virtual StreamBuffer& serialize( StreamBuffer& s ) const;
    00077   virtual StreamBuffer& serialize( StreamBuffer& s );
    00078 private:
    00080   KeyedObject(const KeyedObject& copy) : ContainedObject(copy) {               }
    00081 };
    00082
    00083 /*
    00084  *
    00085  *
    00086  *  Inline code for keyed KeyedObject class
    00087  *
    00088  */
    00089
    00090 // Standard destructor.
    00091 template<class KEY> inline
    00092 KeyedObject<KEY>::~KeyedObject()
    00093 {
    00094   ObjectContainerBase* p = const_cast<ObjectContainerBase*>(parent());
    00095   if ( p )  {
    00096     setParent(0);
    00097     p->remove(this);
    00098   }
    00099 }
    00100
    00101 // Add reference to object (Increase reference counter).
    00102 template<class KEY> inline
    00103 unsigned long KeyedObject<KEY>::addRef() {
    00104   return ++m_refCount;
    00105 }
    00106
    00107 // Release reference. If the reference count is ZERO, delete the object.
    00108 template<class KEY> inline
    00109 unsigned long KeyedObject<KEY>::release() {
    00110   long cnt = --m_refCount;
    00111   if ( cnt <= 0 )  {
    00112     delete this;
    00113   }
    00114   return cnt;
    00115 }
    00116
    00117 /*  Set object key. The key for consistency reasons
    00118     can be set only once for the object. Any attempt to
    00119     redefine the key results in an exception.
    00120 */
    00121 template<class KEY> inline
    00122 void KeyedObject<KEY>::setKey(const key_type& key) {
    00123   if ( !m_hasKey )   {
    00124     m_key = key;
    00125     m_hasKey = true;
    00126     return;
    00127   }
    00128   Containers::cannotAssignObjectKey();
    00129 }
    00130
    00131 // Serialize the object for writing
    00132 template<class KEY> inline
    00133 StreamBuffer& KeyedObject<KEY>::serialize( StreamBuffer& s ) const {
    00134   return ContainedObject::serialize(s) << traits::identifier(m_key);
    00135 }
    00136
    00137 // Serialize the object for reading
    00138 template<class KEY> inline
    00139 StreamBuffer& KeyedObject<KEY>::serialize( StreamBuffer& s ) {
    00140   long k;
    00141   ContainedObject::serialize(s) >> k;
    00142   m_key = traits::makeKey(k);
    00143   m_hasKey = true;
    00144   return s;
    00145 }
    00146 #endif // GAUDIKERNEL_KEYEDOBJECT_H