SimpleCostEstimator (Ontopia)

java.lang.Object
- net.ontopia.topicmaps.query.impl.utils.CostEstimator
- - net.ontopia.topicmaps.query.impl.utils.SimpleCostEstimator

public class SimpleCostEstimator
extends CostEstimator

Constructor Summary

Constructors
Constructor Description

SimpleCostEstimator()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`computeCost(Set context, AbstractClause clause, Set literalvars, String rulename)`	INTERNAL: Computes the cost of evaluating the given clause in the given context of variable bindings.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SimpleCostEstimator
```
public SimpleCostEstimator()
```
- Method Detail
  - computeCost
```
public int computeCost(Set context,
                       AbstractClause clause,
                       Set literalvars,
                       String rulename)
```
    INTERNAL: Computes the cost of evaluating the given clause in the given context of variable bindings. The cost largely depends on the number of unbound variables in the clause.
    
    Specified by:
    
    computeCost in class CostEstimator
    
    Parameters:
    
    context - A set of bound variables.
    
    clause - The clause whose cost we want to compute.
    
    literalvars - Contains the variables representing literals. Only an issue in rules.
    
    rulename - The name of the current rule (so we can delay recursive evaluation).