Package org.apache.vxquery.runtime.functions.step

Class AbstractSinglePathStepScalarEvaluator

java.lang.Object

org.apache.vxquery.runtime.functions.base.AbstractTaggedValueArgumentScalarEvaluator

org.apache.vxquery.runtime.functions.step.AbstractPathStepScalarEvaluator

org.apache.vxquery.runtime.functions.step.AbstractSinglePathStepScalarEvaluator

All Implemented Interfaces:

org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator

Direct Known Subclasses:

AttributePathStepScalarEvaluator

public abstract class AbstractSinglePathStepScalarEvaluator
extends AbstractPathStepScalarEvaluator

Field Summary

Fields

Modifier and Type	Field	Description
protected DynamicContext	dCtx

Fields inherited from class org.apache.vxquery.runtime.functions.step.AbstractPathStepScalarEvaluator

itemTvp, ntp, seqb

Fields inherited from class org.apache.vxquery.runtime.functions.base.AbstractTaggedValueArgumentScalarEvaluator

ppool

Constructor Summary

Constructors

Constructor	Description
AbstractSinglePathStepScalarEvaluator(org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator[] args, org.apache.hyracks.api.context.IHyracksTaskContext ctx)

Method Summary

Modifier and Type	Method	Description
protected void	evaluate(TaggedValuePointable[] args, org.apache.hyracks.data.std.api.IPointable result)
protected abstract void	getSequence(NodeTreePointable ntp, SequencePointable seqp)
protected void	processNodeTree()

Methods inherited from class org.apache.vxquery.runtime.functions.step.AbstractPathStepScalarEvaluator

appendNodeToResult, matches, setNodeTest, setNodeToResult

Methods inherited from class org.apache.vxquery.runtime.functions.base.AbstractTaggedValueArgumentScalarEvaluator

evaluate

Methods inherited from class java.lang.Object

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

Field Detail

dCtx

protected final DynamicContext dCtx

Constructor Detail

AbstractSinglePathStepScalarEvaluator

public AbstractSinglePathStepScalarEvaluator(org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator[] args,
                                             org.apache.hyracks.api.context.IHyracksTaskContext ctx)

Method Detail

getSequence

protected abstract void getSequence(NodeTreePointable ntp,
                                    SequencePointable seqp)
                             throws SystemException

Throws:

SystemException

evaluate

protected final void evaluate(TaggedValuePointable[] args,
                              org.apache.hyracks.data.std.api.IPointable result)
                       throws SystemException

Specified by:

evaluate in class AbstractPathStepScalarEvaluator

Throws:

SystemException

processNodeTree

protected void processNodeTree()
                        throws SystemException,
                               IOException

Throws:

SystemException

IOException