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

Class ChildPathStepOperatorDescriptor

java.lang.Object

org.apache.vxquery.runtime.functions.step.AbstractForwardAxisPathStep

org.apache.vxquery.runtime.functions.step.ChildPathStepOperatorDescriptor

public class ChildPathStepOperatorDescriptor
extends AbstractForwardAxisPathStep

Field Summary

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

dCtx, ntp, pp

Constructor Summary

Constructors

Constructor	Description
ChildPathStepOperatorDescriptor(org.apache.hyracks.api.context.IHyracksTaskContext ctx, PointablePool pp)

Method Summary

Modifier and Type	Method	Description
void	init(TaggedValuePointable tvp, List<Integer> typeCodes)
protected void	setFilterCode(List<Integer> typeCodes)
boolean	step(org.apache.hyracks.data.std.api.IPointable result)	Single node tree input.
protected boolean	stepNodeTree(TaggedValuePointable tvpInput, int level, org.apache.hyracks.data.std.api.IPointable result)	Find the next node to return.

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

getSequence, setNodeToResult

Methods inherited from class java.lang.Object

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

Constructor Detail

ChildPathStepOperatorDescriptor

public ChildPathStepOperatorDescriptor(org.apache.hyracks.api.context.IHyracksTaskContext ctx,
                                       PointablePool pp)

Method Detail

init

public void init(TaggedValuePointable tvp,
                 List<Integer> typeCodes)
          throws SystemException

Throws:

SystemException

setFilterCode

protected void setFilterCode(List<Integer> typeCodes)

step

public boolean step(org.apache.hyracks.data.std.api.IPointable result)
             throws org.apache.hyracks.algebricks.common.exceptions.AlgebricksException

Single node tree input. Requirement: "ntp" must be the node tree.

Parameters:

result - Node tree pointable

Returns:

found result

Throws:

org.apache.hyracks.algebricks.common.exceptions.AlgebricksException - Could not save result.

stepNodeTree

protected boolean stepNodeTree(TaggedValuePointable tvpInput,
                               int level,
                               org.apache.hyracks.data.std.api.IPointable result)
                        throws org.apache.hyracks.algebricks.common.exceptions.AlgebricksException

Find the next node to return.

Parameters:

tvpInput - pointable

level - level

result - result

Returns:

found result

Throws:

org.apache.hyracks.algebricks.common.exceptions.AlgebricksException - Could not save result.