jd.xml.xpath.expr.path
Class PredicateExpression

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

All Implemented Interfaces:

Expression

public class PredicateExpression

extends NodeSetExpression

PredicateExpression represents a predicate that filters a nodeset resulting from another expression.

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

PredicateExpression(Expression nodeSetExpr, Expression predicateExpr, boolean useForwardProximity)
Create a PredicateExpression.

Method Summary

void	accept(ExpressionVisitor visitor) Accept a ExpressionVisitor.
int	getContextDependencies() Return a bitfield indicating the expression dependencies.
XNodeSet	toNodeSet(XPathContext context, int nodeSetOrdering) Evaluate the Expression.

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

canCreateModelWalker, getMaxResultSize, getMaxResultSize, getMinResultSize, getMinResultSize, getModelWalker, 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

PredicateExpression

public PredicateExpression(Expression nodeSetExpr,
                           Expression predicateExpr,
                           boolean useForwardProximity)

Create a PredicateExpression.

Parameters:

nodeSetExpr - an expression that is filtered by the predicate

predicateExpr - the filter predicate

useForwardProximity - flag how to apply a position filter to the nodeset

Method Detail

toNodeSet

public XNodeSet toNodeSet(XPathContext context,
                          int nodeSetOrdering)

Evaluate the Expression.

Specified by:

toNodeSet in interface Expression

Overrides:

toNodeSet in class ExpressionImpl

getContextDependencies

public int getContextDependencies()

Return a bitfield indicating the expression dependencies.

accept

public void accept(ExpressionVisitor visitor)

Description copied from interface: Expression

Accept a ExpressionVisitor.