jd.xml.xpath.expr.path
Class LocationStepChain

java.lang.Object
  jd.xml.xpath.expr.ExpressionImpl
      jd.xml.xpath.expr.NodeSetExpression
          jd.xml.xpath.expr.path.LocationStepChain

All Implemented Interfaces:

Expression

public class LocationStepChain

extends NodeSetExpression

A LocationStepChain is a sequence of single location steps, chained together by the '/' operator. A LocationStepChain could be represented by a series of ComposedPath objects, but allows a more optimized evaluation.

Field Summary

Fields inherited from interface jd.xml.xpath.expr.Expression

DEP_CONTEXT_NODE, DEP_CONTEXT_POSITION, DEP_CONTEXT_SIZE, DEP_CONTEXT_STATIC, DEP_NONE, DEP_UNKNOWN

Constructor Summary

LocationStepChain(LocationStep[] steps)
Create a LocationStepChain.

Method Summary

void	accept(ExpressionVisitor visitor) Accept a ExpressionVisitor.
boolean	canCreateModelWalker() Return true if all steps create a ModelWalker.
static LocationStepChain	create(Expression lhs, LocationStep rhs)
int	getContextDependencies() Return DEP_CONTEXT_NODE.
ModelWalker	getModelWalker() Return a ModelWalker.
XNodeSet	toNodeSet(XPathContext context, int nodeSetOrdering) Evaluate the LocationStep.

Methods inherited from class jd.xml.xpath.expr.NodeSetExpression

getMaxResultSize, getMaxResultSize, getMinResultSize, getMinResultSize, getResultType, toBooleanValue, toNumberValue, toStringValue, toXObject

Methods inherited from class jd.xml.xpath.expr.ExpressionImpl

hasContextDependencies, isUniqueFilter, matchesFilter, toNode, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

LocationStepChain

public LocationStepChain(LocationStep[] steps)

Create a LocationStepChain.

Method Detail

create

public static LocationStepChain create(Expression lhs,
                                       LocationStep rhs)

toNodeSet

public XNodeSet toNodeSet(XPathContext context,
                          int nodeSetOrdering)

Evaluate the LocationStep.

Specified by:

toNodeSet in interface Expression

Overrides:

toNodeSet in class ExpressionImpl

getContextDependencies

public int getContextDependencies()

Return DEP_CONTEXT_NODE.

getModelWalker

public ModelWalker getModelWalker()

Return a ModelWalker.

Overrides:

getModelWalker in class NodeSetExpression

See Also:

NodeSetExpression.canCreateModelWalker()

canCreateModelWalker

public boolean canCreateModelWalker()

Return true if all steps create a ModelWalker.

Overrides:

canCreateModelWalker in class NodeSetExpression

accept

public void accept(ExpressionVisitor visitor)

Description copied from interface: Expression

Accept a ExpressionVisitor.