Package org.apache.qpid.server.query.engine.evaluator

Class QueryEvaluator

java.lang.Object

org.apache.qpid.server.query.engine.evaluator.QueryEvaluator

public class QueryEvaluator
extends Object

Parses and evaluates query

Constructor Summary

Constructors

Constructor	Description
QueryEvaluator(Map<String,QueryExpression<?,?>> queryCache, QuerySettings defaultQuerySettings, Broker<?> broker)	Constructor stores field values
QueryEvaluator(Broker<?> broker)	Constructor stores broker instance

Method Summary

Modifier and Type	Method	Description
<T,R> EvaluationResult<R>	evaluate(QueryExpression<T,R> query)	Evaluates parsed query
<R> EvaluationResult<R>	execute(String sql)	Evaluates query using default settings
<T,R> EvaluationResult<R>	execute(String sql, QuerySettings querySettings)	Evaluates query using supplied settings

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

QueryEvaluator

public QueryEvaluator(Broker<?> broker)

Constructor stores broker instance

Parameters:

broker - Broker instance

QueryEvaluator

public QueryEvaluator(Map<String,QueryExpression<?,?>> queryCache,
                      QuerySettings defaultQuerySettings,
                      Broker<?> broker)

Constructor stores field values

Parameters:

queryCache - Query cache

defaultQuerySettings - Default query settings

broker - Broker instance

Method Detail

execute

public <R> EvaluationResult<R> execute(String sql)

Evaluates query using default settings

Type Parameters:

R - Return parameter type

Parameters:

sql - SQL query

Returns:

EvaluationResult instance

execute

public <T,R> EvaluationResult<R> execute(String sql,
                                               QuerySettings querySettings)

Evaluates query using supplied settings

Type Parameters:

T - Input parameter type

R - Return parameter type

Parameters:

sql - SQL query

querySettings - Query settings

Returns:

EvaluationResult instance

evaluate

public <T,R> EvaluationResult<R> evaluate(QueryExpression<T,R> query)

Evaluates parsed query

Type Parameters:

T - Input parameter type

R - Return parameter type

Parameters:

query - QueryExpression instance

Returns:

EvaluationResult instance