PTLib  Version 2.18.8
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Pages
PObject Class Reference

Ultimate parent class for all objects in the class library. More...

#include <object.h>

Inherited by Info, MXRecord, PAdaptiveDelay, PAec, PArgList, PASNObject, PChannel, PColourPair, PConfig, PContainer, PDNS::NAPTRRecord, PDNS::SRVRecord, PDTMFDecoder, PDynaLink, PEthSocket::Frame, PEthSocketThread, PFileInfo, PHTTPAuthority, PHTTPClientAuthentication, PHTTPConnectionInfo, PHTTPField, PHTTPRequest, PHTTPResource, PInterfaceFilter, PIpAccessControlEntry, PIPSocket::Address, PIPSocket::AddressAndPort, PIPSocket::InterfaceEntry, PIPSocket::RouteEntry, PJSON, PKey< T >, PLDAPAttributeBase, PLDAPSchema, PLDAPSession, PLDAPSession::ModAttrib, PLDAPStructBase, PMail, PMultiPartInfo, PNotifierListTemplate< ParamType >, PNotifierListTemplate< P_INT_PTR >, PNotifierListTemplate< PXMLElement & >, PODBC, PODBC::RecordSet, PODBC::Row, PProcessStartup, PReadWriteMutex, PRegularExpression, PSafeCollection, PSafeObject, PSafePtrBase, PSASLClient, PScriptLanguage, PServiceMacro, PSHA1Context, PSmartObject, PSmartPointer, PSNMPVarBindingList, PSOAPClient, PSOAPServerRequestResponse, PSpoolDirectory [private], PSSLCertificate, PSSLCertificate::X509_Name, PSSLCertificateFingerprint, PSSLCipherContext, PSSLContext, PSSLDiffieHellman, PSSLPrivateKey, PSync, PSyncQueue< T >, PSyncQueue< PQueuedThreadPool::QueuedWorkerThread::QueuedWork >, PSyncQueue< PThread * >, PThread, PThreadPoolBase, PTime, PTimeInterval, PURL, PURLLoader, PURLScheme, PVideoControlInfo, PVideoFont, PVideoFrameInfo, PVideoInputDevice::Capabilities, PVideoInteractionInfo, PVXMLGrammar, PVXMLNodeHandler, PVXMLPlayable, PVXMLRecordable, PXMLBase, PXMLObject, PXMLRPC, PXMLRPCServerParms, PXMLRPCStructBase, PXMLRPCVariableBase, XMPP::Disco::Item, XMPP::Identity, XMPP::JID, XMPP::MUC::Room, XMPP::MUC::User, XMPP::Roster, and XMPP::Roster::Item.

Public Member Functions

__inline unsigned GetTraceContextIdentifier () const
 Get PTRACE context identifier. More...
 
__inline void SetTraceContextIdentifier (unsigned id)
 
__inline void SetTraceContextIdentifier (const PObject &obj)
 
__inline void SetTraceContextIdentifier (const PObject *obj)
 
__inline void CopyTraceContextIdentifier (PObject &obj) const
 
__inline void CopyTraceContextIdentifier (PObject *obj) const
 
virtual ~PObject ()
 
__inline const char * GetClass () const
 
__inline bool IsClass (const char *name) const
 
__inline const PObjectPTraceObjectInstance () const
 
Miscellaneous functions
virtual PObjectClone () const
 Create a copy of the class on the heap. More...
 
template<class CLS >
CLS * CloneAs () const
 As for Clone() but converts to specified type. More...
 
virtual PINDEX HashFunction () const
 This function yields a hash value required by the PDictionary class. More...
 

Static Public Member Functions

static __inline void CopyTraceContextIdentifier (PObject &to, const PObject &from)
 
static __inline void CopyTraceContextIdentifier (PObject &to, const PObject *from)
 
static __inline void CopyTraceContextIdentifier (PObject *to, const PObject &from)
 
static __inline void CopyTraceContextIdentifier (PObject *to, const PObject *from)
 
static __inline const char * Class ()
 
static __inline const PObjectPTraceObjectInstance (const char *)
 
static __inline const PObjectPTraceObjectInstance (const PObject *obj)
 

Protected Member Functions

 PObject ()
 Constructor for PObject, made protected so cannot ever create one on its own. More...
 

Protected Attributes

unsigned m_traceContextIdentifier
 

Comparison functions

enum  Comparison { LessThan = -1, EqualTo = 0, GreaterThan = 1 }
 Result of the comparison operation performed by the Compare() function. More...
 
virtual Comparison Compare (const PObject &obj) const
 Compare the two objects and return their relative rank. More...
 
virtual Comparison CompareObjectMemoryDirect (const PObject &obj) const
 Determine the byte wise comparison of two objects. More...
 
bool operator== (const PObject &obj) const
 Compare the two objects. More...
 
bool operator!= (const PObject &obj) const
 Compare the two objects. More...
 
bool operator< (const PObject &obj) const
 Compare the two objects. More...
 
bool operator> (const PObject &obj) const
 Compare the two objects. More...
 
bool operator<= (const PObject &obj) const
 Compare the two objects. More...
 
bool operator>= (const PObject &obj) const
 Compare the two objects. More...
 
template<typename T >
static Comparison Compare2 (T v1, T v2)
 Compare two types, returning Comparison type. More...
 
static Comparison InternalCompareObjectMemoryDirect (const PObject *obj1, const PObject *obj2, PINDEX size)
 Internal function caled from CompareObjectMemoryDirect() More...
 

I/O functions

virtual void PrintOn (ostream &strm) const
 Output the contents of the object to the stream. More...
 
virtual void ReadFrom (istream &strm)
 Input the contents of the object from the stream. More...
 
ostream & operator<< (ostream &strm, const PObject &obj)
 Global function for using the standard << operator on objects descended from PObject. More...
 
istream & operator>> (istream &strm, PObject &obj)
 Global function for using the standard >> operator on objects descended from PObject. More...
 

Detailed Description

Ultimate parent class for all objects in the class library.

This provides functionality provided to all classes, eg run-time types, default comparison operations, simple stream I/O and serialisation support.

Member Enumeration Documentation

Result of the comparison operation performed by the Compare() function.

Enumerator
LessThan 
EqualTo 
GreaterThan 

Constructor & Destructor Documentation

PObject::PObject ( )
inlineprotected

Constructor for PObject, made protected so cannot ever create one on its own.

Referenced by Class().

virtual PObject::~PObject ( )
inlinevirtual

Member Function Documentation

static __inline const char* PObject::Class ( )
inlinestatic

References PObject().

Referenced by IsClass().

virtual PObject* PObject::Clone ( ) const
virtual

Create a copy of the class on the heap.

The exact semantics of the descendent class determine what is required to make a duplicate of the instance. Not all classes can even do a clone operation.

The main user of the clone function is the PDictionary class as it requires copies of the dictionary keys.

The default behaviour is for this function to assert.

Returns
pointer to new copy of the class instance.

Reimplemented in PStringDictionary< K >, PStringSet, PStringList, PStringArray, PCaselessString, PHTTPMultiSimpAuth, PHTTPSimpleAuth, POrdinalDictionary< K >, PBitArray, PDictionary< K, D >, PDictionary< XMPP::JID, PNotifierListTemplate< P_INT_PTR > >, PDictionary< PString, XMPP::Presence >, PDictionary< PRFC1155_ObjectName, PRFC1155_ObjectSyntax >, PDictionary< PString, PXMLRPCVariableBase >, PDictionary< PString, PLDAPAttributeBase >, PDictionary< PString, PNotifierListTemplate< P_INT_PTR > >, PDictionary< K, POrdinalKey >, PDictionary< K, PString >, PSortedList< T >, PSortedList< PString >, PArray< T >, PArray< PString >, PArray< PBYTEArray >, PArray< K >, PArray< PXMLRPCVariableBase >, PArray< PXMLObject >, PArray< PODBC::Field >, PBYTEArray, PStack< T >, PCharArray, PSet< T >, PSet< PString >, PQueue< T >, PQueue< PXMLElement >, PASNNull, PString, PASNObjectID, PXMLElement, PASNGauge, PASNCounter, PASNTimeTicks, PXMLData, PList< T >, PList< PHTTPServer >, PList< PString >, PList< PSafeObject >, PList< PMultiPartInfo >, PXMLObject, PASNIPAddress, PSocksUDPSocket, PBaseArray< T >, PBaseArray< int >, PBaseArray< PObject * >, PBaseArray< const char * >, PBaseArray< struct berval * >, PBaseArray< BYTE >, PBaseArray< unsigned >, PBaseArray< DWORD >, PBaseArray< char >, PBaseArray< PHashTableList >, PCriticalSection, PASNString, PSocks5Socket, PASNInteger, PSocks4Socket, PHashTableInfo, PASNObject, PTime, XMPP::BareJID, PTimeInterval, PTCPSocket, XMPP::JID, and PKey< T >.

Referenced by CloneAs(), and PList< PMultiPartInfo >::insert().

template<class CLS >
CLS* PObject::CloneAs ( ) const
inline

As for Clone() but converts to specified type.

References Clone().

virtual Comparison PObject::Compare ( const PObject obj) const
virtual

Compare the two objects and return their relative rank.

This function is usually overridden by descendent classes to yield the ranking according to the semantics of the object.

The default function is to use the CompareObjectMemoryDirect() function to do a byte wise memory comparison of the two objects.

Returns
LessThan, EqualTo or GreaterThan according to the relative rank of the objects.

Reimplemented in PVideoInputDeviceIndirect, PAbstractSortedList, PSafePtrMultiThreaded, PArrayObjects, PSafePtrBase, PString, PSSLCertificateFingerprint, PHTTPClientDigestAuthentication, PHTTPClientBasicAuthentication, PServiceMacro, MXRecord, PIPSocket::AddressAndPort, PSSLCertificate::X509_Name, PHTTPClientAuthentication, PDNS::SRVRecord, PHashTable, PSmartPointer, PAbstractArray, PProcess, PFile, PTime, PChannel, PTimeInterval, PAbstractList, PIPSocket::Address, PVideoFrameInfo, PURL, PKey< T >, XMPP::MUC::User, PIndirectChannel, PIpAccessControlEntry, PMemoryFile, XMPP::JID, PHTTPField, PColourPair, and PDNS::NAPTRRecord.

Referenced by operator!=(), operator<(), operator<=(), operator==(), operator>(), and operator>=().

template<typename T >
static Comparison PObject::Compare2 ( v1,
v2 
)
inlinestatic

Compare two types, returning Comparison type.

References EqualTo, GreaterThan, and LessThan.

Referenced by PKey< T >::Compare().

virtual Comparison PObject::CompareObjectMemoryDirect ( const PObject obj) const
virtual

Determine the byte wise comparison of two objects.

This is the default comparison operation for objects that do not explicitly override the Compare() function.

The PCLASSINFO macro declares an override of this function for the particular class. The user need not implement it.

Returns
LessThan, EqualTo or GreaterThan according to the result memcpy() function.
__inline void PObject::CopyTraceContextIdentifier ( PObject obj) const
inline
__inline void PObject::CopyTraceContextIdentifier ( PObject obj) const
inline
static __inline void PObject::CopyTraceContextIdentifier ( PObject to,
const PObject from 
)
inlinestatic
static __inline void PObject::CopyTraceContextIdentifier ( PObject to,
const PObject from 
)
inlinestatic
static __inline void PObject::CopyTraceContextIdentifier ( PObject to,
const PObject from 
)
inlinestatic
static __inline void PObject::CopyTraceContextIdentifier ( PObject to,
const PObject from 
)
inlinestatic
__inline const char* PObject::GetClass ( ) const
inline
__inline unsigned PObject::GetTraceContextIdentifier ( ) const
inline

Get PTRACE context identifier.

References m_traceContextIdentifier.

virtual PINDEX PObject::HashFunction ( ) const
virtual

This function yields a hash value required by the PDictionary class.

A descendent class that is required to be the key of a dictionary should override this function. The precise values returned is dependent on the semantics of the class. For example, the PString class overrides it to provide a hash function for distinguishing text strings.

The default behaviour is to return the value zero.

Returns
hash function value for class instance.

Reimplemented in PString, PChannel, PURL, and PKey< T >.

static Comparison PObject::InternalCompareObjectMemoryDirect ( const PObject obj1,
const PObject obj2,
PINDEX  size 
)
static

Internal function caled from CompareObjectMemoryDirect()

__inline bool PObject::IsClass ( const char *  name) const
inline

References Class().

bool PObject::operator!= ( const PObject obj) const
inline

Compare the two objects.

Returns
true if objects are not equal.

References Compare(), and EqualTo.

bool PObject::operator< ( const PObject obj) const
inline

Compare the two objects.

Returns
true if objects are less than.

References Compare(), and LessThan.

bool PObject::operator<= ( const PObject obj) const
inline

Compare the two objects.

Returns
true if objects are less than or equal.

References Compare(), and GreaterThan.

bool PObject::operator== ( const PObject obj) const
inline

Compare the two objects.

Returns
true if objects are equal.

References Compare(), and EqualTo.

bool PObject::operator> ( const PObject obj) const
inline

Compare the two objects.

Returns
true if objects are greater than.

References Compare(), and GreaterThan.

bool PObject::operator>= ( const PObject obj) const
inline

Compare the two objects.

Returns
true if objects are greater than or equal.

References Compare(), and LessThan.

__inline const PObject* PObject::PTraceObjectInstance ( ) const
inline
static __inline const PObject* PObject::PTraceObjectInstance ( const char *  )
inlinestatic
static __inline const PObject* PObject::PTraceObjectInstance ( const PObject obj)
inlinestatic
virtual void PObject::ReadFrom ( istream &  strm)
virtual

Input the contents of the object from the stream.

The exact input is dependent on the exact semantics of the descendent class. This is primarily used by the standard operator>> function.

The default behaviour is to do nothing.

Reimplemented in PBYTEArray, PCharArray, PAbstractArray, PXML, and PIpAccessControlEntry.

__inline void PObject::SetTraceContextIdentifier ( unsigned  id)
inline
__inline void PObject::SetTraceContextIdentifier ( const PObject obj)
inline
__inline void PObject::SetTraceContextIdentifier ( const PObject obj)
inline

Friends And Related Function Documentation

ostream& operator<< ( ostream &  strm,
const PObject obj 
)
friend

Global function for using the standard << operator on objects descended from PObject.

This simply calls the objects PrintOn() function.

Returns
the strm parameter.
Parameters
strmStream to print the object into.
objObject to print to the stream.
istream& operator>> ( istream &  strm,
PObject obj 
)
friend

Global function for using the standard >> operator on objects descended from PObject.

This simply calls the objects ReadFrom() function.

Returns
the strm parameter.
Parameters
strmStream to read the objects contents from.
objObject to read inormation into.

Member Data Documentation

unsigned PObject::m_traceContextIdentifier
protected

The documentation for this class was generated from the following file: