Interface PathComponent
- All Superinterfaces:
MatchExpression
,XPathExpression
- All Known Subinterfaces:
FilterExpr
,LocationStep
- All Known Implementing Classes:
AbstractPathComponent
A basic interface for LocationStep or FilterExpr
- Version:
- $Revision: 4050 $ $Date: 2004-01-13 07:04:15 +0100 (Tue, 13 Jan 2004) $
- Author:
- Keith Visco
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Field Summary
Fields inherited from interface org.exolab.adaptx.xpath.XPathExpression
BOOLEAN, ERROR, FILTER_EXPR, LOCATION_PATH, NODE_TEST, NUMBER, PATH_EXPR, PRIMARY, STEP, STRING, UNION_EXPR
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Method Summary
Modifier and TypeMethodDescriptionvoid
evaluatePredicates
(NodeSet nodes, XPathContext context) Evaluates the PredicateExpr of this PathComponent against the given NodeSet and XPathContext.double
Determines the priority of a PatternExpr as follows:Returns the PredicateExpr of this PathComponentReturns the sub-expression encapsulated by this PathComponent.boolean
Returns true if this PathComponent has predicates expressions.boolean
Returns true if this PathComponent is a FilterExpr.boolean
Returns true if this PathComponent is a LocationStep.Methods inherited from interface org.exolab.adaptx.xpath.expressions.MatchExpression
matches
Methods inherited from interface org.exolab.adaptx.xpath.XPathExpression
evaluate, getExprType, toString
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Method Details
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isFilterExpr
boolean isFilterExpr()Returns true if this PathComponent is a FilterExpr. Note that if this method returns true, then a call to #isLocationStep must return false.- Returns:
- true if this PathComponent is a FilterExpr
- See Also:
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isLocationStep
boolean isLocationStep()Returns true if this PathComponent is a LocationStep. Note that if this method returns true, then a call to #isFilterExpr must return false.- Returns:
- true if this PathComponent is a LocationStep
- See Also:
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getDefaultPriority
double getDefaultPriority()Determines the priority of a PatternExpr as follows:From the 19991116 XSLT 1.0 Recommendation: + If the pattern has the form of a QName preceded by a ChildOrAttributeAxisSpecifier or has the form processing-instruction(Literal) then the priority is 0. + If the pattern has the form NCName:* preceded by a ChildOrAttributeAxisSpecifier, then the priority is -0.25 + Otherwise if the pattern consists of just a NodeTest preceded by a ChildOrAttributeAxisSpecifier then the priority is -0.5 + Otherwise the priority is 0.5
- Returns:
- the priority for this PatternExpr
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getSubExpression
XPathExpression getSubExpression()Returns the sub-expression encapsulated by this PathComponent. the sub-expression will either be a PrimaryExpr if this PathComponent is a FilterExpr, or a NodeExpression if this Pathcomponent is a LocationStep. This method may return null if no such sub-expression exists for the PathComponent.- Returns:
- the sub-expression encapsulated by this PathComponent.
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evaluatePredicates
Evaluates the PredicateExpr of this PathComponent against the given NodeSet and XPathContext.- Parameters:
nodes
- the current NodeSetcontext
- the XPathContext for use during evaluation.- Throws:
XPathException
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getPredicate
PredicateExpr getPredicate()Returns the PredicateExpr of this PathComponent- Returns:
- the PredicateExpr of this PathComponent
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hasPredicates
boolean hasPredicates()Returns true if this PathComponent has predicates expressions.- Returns:
- true if this PathComponent has predicates expressions.
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