FlyWeightLists< ValueType, UniqueTag > Class Template Reference

#include <FlyWeight.h>

Inheritance diagram for FlyWeightLists< ValueType, UniqueTag >:

List of all members.

Public Types
typedef int	Proxy_t
typedef std::map< ValueType, Proxy_t >	ValueToProxyMap
typedef std::vector< ValueType >	ProxyToValueMap
Public Member Functions
	FlyWeightLists ()
bool	empty () const
FlyWeight
A generic flyweight to store relatively bulky objects that are massively re-used, such as the source IDs in each TAP / TDP. Objects such as TAPs and TDPs often contain largely repeated data such as the source ID for all pulses coming from the same algorithm applied to the same detector channel. To reduce the redundancy and therefore save memory and some processing time, this class implements a simple version of the flyweight pattern, which replaces each different value with an int, but provides a similar interface to the object that it wraps. When we want to store a new value, it is searched for in the ProxyToValueMap and the index identifying where it is is saved is used instead. If the value has not been used already, it is added to the list of values Template Parameters: ValueType  The type of value this flyweight contains UniqueTag  An optional template parameter to make sure the flyweight is unique, such as to separate the flyweight for TAPs from TDPs, even though the ValueType is the same
int	GetProxy (const ValueType &v)
const ValueType &	GetValue (const Proxy_t &v)
void	DumpTable () const
Private Member Functions
	ClassDef (FlyWeightLists, 1)
Private Attributes
ProxyToValueMap	sProxyToVals
ValueToProxyMap	sValsToProxies

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Detailed Description

template<typename ValueType, typename UniqueTag = int>
class FlyWeightLists< ValueType, UniqueTag >

Definition at line 13 of file FlyWeight.h.

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Member Typedef Documentation

template<typename ValueType, typename UniqueTag = int>

typedef int FlyWeightLists< ValueType, UniqueTag >::Proxy_t

Definition at line 15 of file FlyWeight.h.

template<typename ValueType, typename UniqueTag = int>

typedef std::vector<ValueType> FlyWeightLists< ValueType, UniqueTag >::ProxyToValueMap

Definition at line 18 of file FlyWeight.h.

template<typename ValueType, typename UniqueTag = int>

typedef std::map<ValueType,Proxy_t> FlyWeightLists< ValueType, UniqueTag >::ValueToProxyMap

Definition at line 17 of file FlyWeight.h.

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Constructor & Destructor Documentation

template<typename ValueType, typename UniqueTag = int>

FlyWeightLists< ValueType, UniqueTag >::FlyWeightLists

(

)

[inline]

Definition at line 15 of file FlyWeight.h.

{};

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Member Function Documentation

template<typename ValueType, typename UniqueTag = int>

FlyWeightLists< ValueType, UniqueTag >::ClassDef	(	FlyWeightLists< ValueType, UniqueTag >	,
		1
	)			[private]

template<typename ValueType , typename UniqueTag >

void FlyWeightLists< ValueType, UniqueTag >::DumpTable

(

)

const [inline]

Definition at line 154 of file FlyWeight.h.

References FlyWeightLists< ValueType, UniqueTag >::sProxyToVals, and FlyWeightLists< ValueType, UniqueTag >::sValsToProxies.

                                                               {
    std::cout<<"Proxy | Value | Proxy"<<std::endl;
    for(unsigned i=0;i<sProxyToVals.size();i++){
        std::cout<<i<<" | "<<sProxyToVals[i]<<" | "<<sValsToProxies.find(sProxyToVals[i])->second<<std::endl;
    }
}

template<typename ValueType, typename UniqueTag = int>

bool FlyWeightLists< ValueType, UniqueTag >::empty

(

)

const [inline]

Definition at line 23 of file FlyWeight.h.

{return sProxyToVals.empty();}

template<typename ValueType, typename UniqueTag >

int FlyWeightLists< ValueType, UniqueTag >::GetProxy

(

const ValueType &

v

)

[inline]

Definition at line 140 of file FlyWeight.h.

References FlyWeightLists< ValueType, UniqueTag >::sProxyToVals, and FlyWeightLists< ValueType, UniqueTag >::sValsToProxies.

                                                                          {
    // Is this proxy already contained in the maps
    typename ValueToProxyMap::const_iterator it=sValsToProxies.find(v);
    if(it!=sValsToProxies.end()){
        return it->second;
    } 
    // if it's a new kind, add the source to the hash table
    int proxy=sValsToProxies.size();
    sValsToProxies[v]=proxy;
    sProxyToVals.push_back(v);
    return proxy;
}

template<typename ValueType , typename UniqueTag >

const ValueType & FlyWeightLists< ValueType, UniqueTag >::GetValue

(

const Proxy_t &

v

)

[inline]

Definition at line 134 of file FlyWeight.h.

References FlyWeightLists< ValueType, UniqueTag >::sProxyToVals.

                         {
    return sProxyToVals.at(v);
}

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Member Data Documentation

template<typename ValueType, typename UniqueTag = int>

ProxyToValueMap FlyWeightLists< ValueType, UniqueTag >::sProxyToVals [private]

Definition at line 27 of file FlyWeight.h.

Referenced by FlyWeightLists< ValueType, UniqueTag >::DumpTable(), FlyWeightLists< IDs::source, TAnalysedPulse::Tag >::empty(), FlyWeightLists< ValueType, UniqueTag >::GetProxy(), and FlyWeightLists< ValueType, UniqueTag >::GetValue().

template<typename ValueType, typename UniqueTag = int>

ValueToProxyMap FlyWeightLists< ValueType, UniqueTag >::sValsToProxies [private]

Definition at line 28 of file FlyWeight.h.

Referenced by FlyWeightLists< ValueType, UniqueTag >::DumpTable(), and FlyWeightLists< ValueType, UniqueTag >::GetProxy().

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

• rootana/src/framework/FlyWeight.h