RuleEngine (container-search 7.567.26 API)

java.lang.Object
- com.yahoo.prelude.semantics.engine.RuleEngine

```
public class RuleEngine
extends Object
```
Evaluates the rules of a rule base. This method is thread safe on analyze calls, but not on modification calls.

Author:

bratseth

- Constructor Summary
  
  Constructors
  Constructor Description
  
  RuleEngine(RuleBase rules)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  String evaluate(Query query, int traceLevel)
  Evaluates a rule base over a query
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - RuleEngine
```
public RuleEngine(RuleBase rules)
```
- Method Detail
  - evaluate
```
public String evaluate(Query query,
                       int traceLevel)
```
    Evaluates a rule base over a query
    
    Parameters:
    
    query - the query to evaluate
    
    traceLevel - the level of tracing to do
    
    Returns:
    
    the error caused by analyzing the query, or null if there was no error If there is an error, this query is destroyed (unusable)