[1991be]: src / include / compiler / LogicalFactory.h  Maximize  Restore  History

Download this file

73 lines (62 with data), 2.1 kB

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
#ifndef LOGICAL_FACTORY_H_
#define LOGICAL_FACTORY_H_
#include <vector>
#include <utility>
#include <map>
#include <cfloat>
#include <function/FunctionPtr.h>
#include <compiler/NodeFactory.h>
namespace jags {
class Function;
class Node;
class Model;
class LogicalNode;
/**
* A "logical pair", consisting of a function and a vector of arguments,
* uniquely defines a logical node.
*/
typedef std::pair<FunctionPtr,std::vector<Node const *> > LogicalPair;
/**
* @short "Less than" function for LogicalPair objects.
*
* Two LogicalPairs A and B are considered to be equivalent
* (i.e. lt(A,B) and lt(B,A) are both false) if they have the same
* function, and the same vector of parameters. Observed parameters
* are considered equal if they have the same value (within a certain
* numerical tolerance).
*
* For non-equivalent LogicalPairs, the ordering is unique, but
* arbitrary. The only use of this function is for the STL map class
* with LogicalPair as key.
*/
bool lt(LogicalPair const &arg1, LogicalPair const &arg2);
/**
* @short Factory object for logical nodes
*
* The value of a logical node is determined uniquely by its function
* and its parameters. The purpose of a LogicalFactory is to avoid
* unnecessary duplication of logical nodes by having a factory object
* for them that will create and/or lookup logical nodes based on
* these arguments.
*/
class LogicalFactory
{
std::map<LogicalPair, Node*, fuzzy_less<LogicalPair> > _logicalmap;
public:
/**
* Get a logical node with a given function and given parameters.
* The results are cached, so if a request is repeated, the same
* node will be returned. If a newly allocated node is returned,
* it is also added to the given Model.
*/
Node *getNode(FunctionPtr const &func,
std::vector<Node const*> const &param,
Model &model);
/**
* Returns a newly allocated LogicalNode.
*/
static LogicalNode* newNode(FunctionPtr const &func,
std::vector<Node const *> const &parents);
};
} /* namespace jags */
#endif /* LOGICAL_FACTORY_H_ */

Get latest updates about Open Source Projects, Conferences and News.

Sign up for the SourceForge newsletter:

JavaScript is required for this form.





No, thanks