QueryOptimizer.RecursivePruner (Ontopia)

java.lang.Object
- net.ontopia.topicmaps.query.impl.utils.QueryOptimizer.AbstractQueryOptimizer
- - net.ontopia.topicmaps.query.impl.utils.QueryOptimizer.RecursivePruner

All Implemented Interfaces:

QueryOptimizerIF

Enclosing class:

QueryOptimizer
```
public static class QueryOptimizer.RecursivePruner
extends QueryOptimizer.AbstractQueryOptimizer
```
This optimizer adds RemoveDuplicatesPredicate on both sides of recursive calls within predicate rules. Recursive rules tend to generate lots of redundant temporary results, which again generate more redundant junk. Removing duplicates cuts down the junk dramatically. This optimizer fixes bug #791.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  RecursivePruner()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  List optimize(List clauses, QueryContext context)
  - Methods inherited from class net.ontopia.topicmaps.query.impl.utils.QueryOptimizer.AbstractQueryOptimizer
    optimize, optimize
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - RecursivePruner
```
public RecursivePruner()
```
- Method Detail
  - optimize
```
public List optimize(List clauses,
                     QueryContext context)
```
    Specified by:
    
    optimize in interface QueryOptimizerIF
    
    Overrides:
    
    optimize in class QueryOptimizer.AbstractQueryOptimizer