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

Class AbstractDescendantPathStepScalarEvaluator

java.lang.Object

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

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

org.apache.vxquery.runtime.functions.step.AbstractDescendantPathStepScalarEvaluator

All Implemented Interfaces:

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

Direct Known Subclasses:

DescendantOrSelfPathStepScalarEvaluator, DescendantPathStepScalarEvaluator

public abstract class AbstractDescendantPathStepScalarEvaluator
extends AbstractPathStepScalarEvaluator

Field Summary

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

Method Summary

Modifier and Type	Method	Description
protected abstract void	evaluate(TaggedValuePointable[] args, org.apache.hyracks.data.std.api.IPointable result)
protected void	searchSubtree(TaggedValuePointable nodePointable)	Search through all tree children and children's children.

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

Constructor Detail

AbstractDescendantPathStepScalarEvaluator

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

Method Detail

evaluate

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

Specified by:

evaluate in class AbstractPathStepScalarEvaluator

Throws:

SystemException

searchSubtree

protected void searchSubtree(TaggedValuePointable nodePointable)
                      throws SystemException

Search through all tree children and children's children.

Parameters:

nodePointable - Node pointable

Throws:

SystemException - Could not save result.