khanat-opennel-code/code/ryzom/client/src/cdb_branch.h

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2010-05-06 00:08:41 +00:00
// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef CDB_BRANCH_H
#define CDB_BRANCH_H
#include "cdb.h"
#include "game_share/ryzom_database_banks.h"
/**
* Database Node which contains a set of properties
* \author Stephane Coutelas
* \author Nevrax France
* \date 2002
*/
class CCDBNodeBranch : public ICDBNode
{
public:
// default constructor
CCDBNodeBranch(const std::string &name) : ICDBNode(name)
{
_Parent = NULL;
_IdBits = 0;
_Sorted = false;
}
/**
* Build the structure of the database from a file
* \param f is the stream
*/
void init( xmlNodePtr node, class NLMISC::IProgressCallback &progressCallBack, bool mapBanks=false );
/**
* Add a new sub node
* \param node is the new subnode
* \param nodeName is the name of the node
*/
void attachChild( ICDBNode * node, std::string nodeName );
/**
* Get a node . Create it if it does not exist yet
* \param id : the CTextId identifying the node
*/
ICDBNode * getNode (const CTextId& id, bool bCreate=true);
/**
* Get a node. Return NULL if out of bounds (no warning)
* \param idx is the node index
*/
ICDBNode * getNode( uint16 idx );
/**
* Get a node index
* \param node is a pointer to the node
*/
virtual bool getNodeIndex( ICDBNode* node , uint& index)
{
index=0;
for ( std::vector<ICDBNode*>::const_iterator it = _Nodes.begin(); it != _Nodes.end(); it++)
{
if (*it == node)
return true;
index++;
}
return false;
}
// return the child with the given node id, creating it if requested
CCDBNodeLeaf *getLeaf( const char *id, bool bCreate );
CCDBNodeLeaf *getLeaf( const std::string &id, bool bCreate ) { return getLeaf(id.c_str(), bCreate); }
/**
* Save a backup of the database
* \param id is the text id of the property/grp
* \param f is the stream
*/
void write( CTextId& id, FILE * f);
/// Update the database from the delta, but map the first level with the bank mapping (see _CDBBankToUnifiedIndexMapping)
void readAndMapDelta( NLMISC::TGameCycle gc, NLMISC::CBitMemStream& s, TCDBBank bank );
/// Update the database from a stream coming from the FE
void readDelta( NLMISC::TGameCycle gc, NLMISC::CBitMemStream & f );
/**
* Return the value of a property (the update flag is set to false)
* \param id is the text id of the property/grp
* \param name is the name of the property
* \return the value of the property
*/
sint64 getProp( CTextId& id );
/**
* Set the value of a property (the update flag is set to true)
* \param id is the text id of the property/grp
* \param name is the name of the property
* \param value is the value of the property
* \return bool : 'true' if property found.
*/
bool setProp( CTextId& id, sint64 value );
/// Clear the node and his children
void clear();
/// Reset the data corresponding to the bank (works only on top level node)
void resetBank( NLMISC::TGameCycle gc, TCDBBank bank)
{
//nlassert( getParent() == NULL );
for ( uint i=0; i!=_Nodes.size(); ++i )
{
if ( _UnifiedIndexToBank[i] == bank )
_Nodes[i]->resetData(gc);
}
}
/// Reset all leaf data from this point
void resetData(NLMISC::TGameCycle gc, bool forceReset=false)
{
for ( uint i=0; i!=_Nodes.size(); ++i )
{
_Nodes[i]->resetData(gc, forceReset);
}
}
/**
* Destructor
*/
virtual ~CCDBNodeBranch() { clear(); }
// the parent node for a branch (NULL by default)
virtual void setParent(CCDBNodeBranch *parent) { _Parent=parent; }
virtual CCDBNodeBranch* getParent()
{
return _Parent;
}
//get the number of nodes
uint16 getNbNodes()
{
return (uint16)_Nodes.size();
}
/// Count the leaves
virtual uint countLeaves() const;
/// Find the leaf which count is specified (if found, the returned value is non-null and count is 0)
virtual CCDBNodeLeaf *findLeafAtCount( uint& count );
virtual void display (const std::string &prefix);
void removeNode (CTextId& id);
/**
* add an observer to a property
* \param observer : pointer to an observer
* \param id text id identifying the property
* \return false if the node doen t exist
*/
virtual bool addObserver(IPropertyObserver* observer, CTextId& id);
/** remove an obsever
* \param observer : pointer to an observer
* \return false if the node or observer doesn t exist
*/
virtual bool removeObserver(IPropertyObserver* observer, CTextId& id);
// Add an observer to this branch. It will be notified of any change in the sub-leaves
/**
* Add observer to all sub-leaves, except if a positive filter is set:
* If positiveLeafNameFilter is non-empty, only changes to leaves having names found in it
* will be notified (this is equivalent to creating a sub-branch containing only the specified leaves
* and setting a branch observer on it, except you don't need to change your database paths
* and update large amounts of code!).
*/
void addBranchObserver(IPropertyObserver* observer, const std::vector<std::string>& positiveLeafNameFilter=std::vector<std::string>());
/**
* Easy version of addBranchObserver() (see above).
* Examples of dbPathFromThisNode:
* "" -> this node
* "FOO:BAR" -> sub-branch "BAR" of "FOO" which is a sub-branch of this node
*/
void addBranchObserver(const char *dbPathFromThisNode, ICDBNode::IPropertyObserver& observer, const char **positiveLeafNameFilter=NULL, uint positiveLeafNameFilterSize=0);
// Remove observer from all sub-leaves
bool removeBranchObserver(IPropertyObserver* observer);
/// Easy version of removeBranchObserver() (see above and see easy version of addBranchObserver())
void removeBranchObserver(const char *dbPathFromThisNode, ICDBNode::IPropertyObserver& observer);
virtual bool isLeaf() const { return false; }
/** Update all observers of branchs that have been modified
*/
static void flushObserversCalls();
// mark this branch and parent branch as 'modified'. This is usually called by sub-leaves
void linkInModifiedNodeList(NLMISC::TStringId modifiedLeafName);
/// Find a subnode at this level
ICDBNode * find (const std::string &nodeName);
/// Main init
static void resetNodeBankMapping() { _UnifiedIndexToBank.clear(); }
// reset all static mappings
static void reset();
/// Internal use only
static void mapNodeByBank( ICDBNode *node, const std::string& bankStr, bool clientOnly, uint nodeIndex );
protected:
/** Struct identifying an observer of a db branch
* This struct can be linked in a list so that we can update observers only once per pass.
* An observer that watch a whole branch can be updated once and only once after each element of the branch has been modified
*/
class CDBBranchObsInfo
{
public:
NLMISC::CRefPtr<IPropertyObserver> Observer;
// 2 linked list are required : while the observer is notified, it can triger one other observer, so we must link it in another list
bool Touched[2];
CDBBranchObsInfo *PrevNotifiedObserver[2]; // NULL means this is the head
CDBBranchObsInfo *NextNotifiedObserver[2];
ICDBNode *Owner;
// If non-empty, only a leaf whose name is found here will notify something
// This is equivalent to creating a sub-branch containing only the specified leaves
// and setting a branch observer on it, except you don't need to change your database paths
// and update large amounts of code and script!
std::vector<NLMISC::TStringId> PositiveLeafNameFilter;
public:
/// Constructor. See above for usage of positiveLeafNameFilter.
CDBBranchObsInfo(IPropertyObserver *obs = NULL, ICDBNode *owner = NULL, const std::vector<std::string>& positiveLeafNameFilter=std::vector<std::string>())
{
Owner = owner;
Observer = obs;
Touched[0] = Touched[1] = false;
PrevNotifiedObserver[0] = PrevNotifiedObserver[1] = NULL;
NextNotifiedObserver[0] = NextNotifiedObserver[1] = NULL;
for (std::vector<std::string>::const_iterator ipf=positiveLeafNameFilter.begin(); ipf!=positiveLeafNameFilter.end(); ++ipf)
{
PositiveLeafNameFilter.push_back(ICDBNode::getStringId(*ipf)); // the ids are also mapped at database init, we don't need to unmap them in destructor
}
}
~CDBBranchObsInfo()
{
// should have been unlinked
nlassert(Touched[0] == false);
nlassert(Touched[1] == false);
nlassert(PrevNotifiedObserver[0] == NULL);
nlassert(PrevNotifiedObserver[1] == NULL);
nlassert(NextNotifiedObserver[0] == NULL);
nlassert(NextNotifiedObserver[1] == NULL);
}
// Unlink from the given list. This also clear the '_Touched' flag
void unlink(uint list);
void link(uint list, NLMISC::TStringId modifiedLeafName);
};
typedef std::list<CDBBranchObsInfo> TObsList; // must use a list because pointers on CDBObserverInfo instances must remains valids
protected:
CCDBNodeBranch *_Parent;
/// database subnodes not sorted
std::vector<ICDBNode*> _Nodes;
/// subnodes sorted by name
std::vector<ICDBNode*> _NodesByName;
// number of bits required to stock my children's ids
uint8 _IdBits : 7;
bool _Sorted : 1;
// observers for this node or branch
TObsList _Observers;
friend class CDBBranchObsInfo;
// Global list of modified nodes
static CDBBranchObsInfo *_FirstNotifiedObs[2];
static CDBBranchObsInfo *_LastNotifiedObs[2];
static uint _CurrNotifiedObsList; // 0 or 1 => tell in which list observers of modified values must be added
// current & next observers being notified : if such observer if removed during notification, pointer will be valids
static CDBBranchObsInfo *_CurrNotifiedObs;
static CDBBranchObsInfo *_NextNotifiedObs;
/// Mapping from server database index to client database index (first-level nodes)
static std::vector<uint> _CDBBankToUnifiedIndexMapping [NB_CDB_BANKS];
// Mapping from client database index to TCDBBank (first-level nodes)
static std::vector<TCDBBank> _UnifiedIndexToBank;
/// Last index mapped
static uint _CDBLastUnifiedIndex;
/// Number of bits for first-level branches, by bank
static uint _FirstLevelIdBitsByBank [NB_CDB_BANKS];
/// called by clear
void removeAllBranchObserver();
void removeBranchInfoIt(TObsList::iterator it);
};
#endif // CDB_BRANCH_H