io.prestosql.memory

Class TraversingQueryContextVisitor<C,R>

java.lang.Object

io.prestosql.memory.TraversingQueryContextVisitor<C,R>

All Implemented Interfaces:

QueryContextVisitor<C,R>

Direct Known Subclasses:

VoidTraversingQueryContextVisitor

public abstract class TraversingQueryContextVisitor<C,R>
extends Object
implements QueryContextVisitor<C,R>

Constructor Summary

Constructors

Constructor and Description
TraversingQueryContextVisitor()

Method Summary

Modifier and Type	Method and Description
protected abstract R	mergeResults(List<R> childrenResults)
R	visitDriverContext(DriverContext driverContext, C visitContext)
abstract R	visitOperatorContext(OperatorContext operatorContext, C visitContext)
R	visitPipelineContext(PipelineContext pipelineContext, C visitContext)
R	visitQueryContext(QueryContext queryContext, C visitContext)
R	visitTaskContext(TaskContext taskContext, C visitContext)

Methods inherited from class java.lang.Object

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

Constructor Detail

TraversingQueryContextVisitor

public TraversingQueryContextVisitor()

Method Detail

mergeResults

protected abstract R mergeResults(List<R> childrenResults)

visitQueryContext

public R visitQueryContext(QueryContext queryContext,
                           C visitContext)

Specified by:

visitQueryContext in interface QueryContextVisitor<C,R>

visitTaskContext

public R visitTaskContext(TaskContext taskContext,
                          C visitContext)

Specified by:

visitTaskContext in interface QueryContextVisitor<C,R>

visitPipelineContext

public R visitPipelineContext(PipelineContext pipelineContext,
                              C visitContext)

Specified by:

visitPipelineContext in interface QueryContextVisitor<C,R>

visitDriverContext

public R visitDriverContext(DriverContext driverContext,
                            C visitContext)

Specified by:

visitDriverContext in interface QueryContextVisitor<C,R>

visitOperatorContext

public abstract R visitOperatorContext(OperatorContext operatorContext,
                                       C visitContext)

Specified by:

visitOperatorContext in interface QueryContextVisitor<C,R>