Package com.yahoo.prelude.semantics.engine

Class RuleEngine

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

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 Details

RuleEngine

public RuleEngine(RuleBase rules)

Method Details

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)