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

Class AbstractPathStepScalarEvaluator

java.lang.Object

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

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

All Implemented Interfaces:

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

Direct Known Subclasses:

AbstractDescendantPathStepScalarEvaluator, AbstractSinglePathStepScalarEvaluator, SelfPathStepScalarEvaluator

public abstract class AbstractPathStepScalarEvaluator
extends AbstractTaggedValueArgumentScalarEvaluator

Field Summary

Fields

Modifier and Type	Field	Description
protected TaggedValuePointable	itemTvp
protected NodeTreePointable	ntp
protected SequenceBuilder	seqb

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

ppool

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
protected void	appendNodeToResult()
protected abstract void	evaluate(TaggedValuePointable[] args, org.apache.hyracks.data.std.api.IPointable result)
protected boolean	matches()
protected void	setNodeTest(SequenceType sType)
protected void	setNodeToResult(org.apache.hyracks.data.std.api.IPointable result)

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

seqb

protected final SequenceBuilder seqb

ntp

protected final NodeTreePointable ntp

itemTvp

protected final TaggedValuePointable itemTvp

Constructor Detail

AbstractPathStepScalarEvaluator

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

Method Detail

setNodeTest

protected void setNodeTest(SequenceType sType)

evaluate

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

Specified by:

evaluate in class AbstractTaggedValueArgumentScalarEvaluator

Throws:

SystemException

matches

protected boolean matches()

setNodeToResult

protected void setNodeToResult(org.apache.hyracks.data.std.api.IPointable result)
                        throws IOException

Throws:

IOException

appendNodeToResult

protected void appendNodeToResult()
                           throws IOException

Throws:

IOException