Package com.icl.saxon.pattern
Class LocationPathPattern
java.lang.Object
com.icl.saxon.pattern.Pattern
com.icl.saxon.pattern.LocationPathPattern
A LocationPathPattern represents a path, e.g. of the form A/B/C... The components are represented
as a linked list, each component pointing to its predecessor
-
Field Summary
FieldsModifier and TypeFieldDescriptionprotected Expression
protected Expression[]
protected boolean
protected boolean
protected int
protected boolean
Fields inherited from class com.icl.saxon.pattern.Pattern
originalText, staticContext
-
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
addFilter
(Expression filter) Add a filter to the pattern (while under construction)int
Determine the fingerprint of nodes to which this pattern applies.short
Determine the types of nodes to which this pattern applies.boolean
Determine if the pattern uses positional filtersboolean
Determine whether this Pattern matches the given Nodeboolean
Determine whether the pattern matches a given node.simplify()
Simplify the pattern: perform any context-independent optimisationsMethods inherited from class com.icl.saxon.pattern.Pattern
getDefaultPriority, getLineNumber, getStaticContext, getSystemId, make, setOriginalText, setStaticContext, toString
-
Field Details
-
parentPattern
-
ancestorPattern
-
nodeTest
-
filters
-
numberOfFilters
protected int numberOfFilters -
equivalentExpr
-
firstElementPattern
protected boolean firstElementPattern -
lastElementPattern
protected boolean lastElementPattern -
specialFilter
protected boolean specialFilter
-
-
Constructor Details
-
LocationPathPattern
public LocationPathPattern()
-
-
Method Details
-
addFilter
Add a filter to the pattern (while under construction)- Parameters:
filter
- The predicate (a boolean expression or numeric expression) to be added
-
simplify
Simplify the pattern: perform any context-independent optimisations- Overrides:
simplify
in classPattern
- Returns:
- the optimised Pattern
- Throws:
XPathException
-
matchesX
Determine whether the pattern matches a given node.- Parameters:
node
- the node to be tested- Returns:
- true if the pattern matches, else false
- Throws:
XPathException
-
matches
Description copied from class:Pattern
Determine whether this Pattern matches the given Node- Specified by:
matches
in classPattern
- Parameters:
node
- The NodeInfo representing the Element or other node to be tested against the Patterncontext
- The context in which the match is to take place. Only relevant if the pattern uses variables.- Returns:
- true if the node matches the Pattern, false otherwise
- Throws:
XPathException
-
getNodeType
public short getNodeType()Determine the types of nodes to which this pattern applies. Used for optimisation. For patterns that match nodes of several types, return Node.NODE- Overrides:
getNodeType
in classPattern
- Returns:
- the type of node matched by this pattern. e.g. Node.ELEMENT or Node.TEXT
-
getFingerprint
public int getFingerprint()Determine the fingerprint of nodes to which this pattern applies. Used for optimisation.- Overrides:
getFingerprint
in classPattern
- Returns:
- the fingerprint of nodes matched by this pattern.
-
isRelative
Determine if the pattern uses positional filters- Returns:
- true if there is a numeric filter in the pattern, or one that uses the position() or last() functions
- Throws:
XPathException
-