public final class LocationPathPattern extends Pattern
?????? | ????? |
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Pattern |
ancestorPattern |
protected Expression |
equivalentExpr |
protected Expression[] |
filters |
protected boolean |
firstElementPattern |
protected boolean |
lastElementPattern |
NodeTest |
nodeTest |
protected int |
numberOfFilters |
Pattern |
parentPattern |
protected boolean |
specialFilter |
?????? |
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LocationPathPattern()
Create a LocationPathPattern
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?????? | ????? |
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void |
addFilter(Expression filter)
Add a filter to the pattern (while under construction)
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int |
allocateSlots(StaticContext env,
SlotManager slotManager,
int nextFree)
Allocate slots to any variables used within the pattern
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Pattern |
analyze(ExpressionVisitor visitor,
ItemType contextItemType)
Type-check the pattern, performing any type-dependent optimizations.
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boolean |
equals(java.lang.Object other)
Determine whether this pattern is the same as another pattern
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Pattern |
getAncestorPattern()
Get the pattern applying to an ancestor node, if there is one
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int |
getDependencies()
Get the dependencies of the pattern.
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Expression[] |
getFilters()
Get the filters assocated with the last step in the pattern
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int |
getFingerprint()
Determine the fingerprint of nodes to which this pattern applies.
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int |
getNodeKind()
Determine the types of nodes to which this pattern applies.
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NodeTest |
getNodeTest()
Get a NodeTest that all the nodes matching this pattern must satisfy
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Pattern |
getParentPattern()
Get the pattern applying to the parent node, if there is one
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int |
hashCode()
Hashcode supporting equals()
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protected boolean |
internalMatches(NodeInfo node,
XPathContext context)
Test whether the pattern matches, but without changing the current() node
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java.util.Iterator |
iterateSubExpressions()
Iterate over the subexpressions within this pattern
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boolean |
matches(NodeInfo node,
XPathContext context)
Determine whether the pattern matches a given node.
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void |
promote(PromotionOffer offer)
Offer promotion for subexpressions within this pattern.
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boolean |
replaceSubExpression(Expression original,
Expression replacement)
Replace one subexpression by a replacement subexpression
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void |
resolveCurrent(LetExpression let,
PromotionOffer offer,
boolean topLevel)
If the pattern contains any calls on current(), this method is called to modify such calls
to become variable references to a variable declared in a specially-allocated local variable
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void |
setExecutable(Executable executable)
Set the executable containing this pattern
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Pattern |
simplify(ExpressionVisitor visitor)
Simplify the pattern: perform any context-independent optimisations
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getColumnNumber, getDefaultPriority, getExecutable, getHostLanguage, getLineNumber, getLocationProvider, getPublicId, getSystemId, make, makeSearchExpression, selectNodes, setLineNumber, setOriginalText, setSystemId, toString
public Pattern parentPattern
public Pattern ancestorPattern
public NodeTest nodeTest
protected Expression[] filters
protected int numberOfFilters
protected Expression equivalentExpr
protected boolean firstElementPattern
protected boolean lastElementPattern
protected boolean specialFilter
public void addFilter(Expression filter)
filter
- The predicate (a boolean expression or numeric expression) to be addedpublic void setExecutable(Executable executable)
setExecutable
??? Pattern
executable
- the executablepublic Expression[] getFilters()
public Pattern getParentPattern()
public Pattern getAncestorPattern()
public Pattern simplify(ExpressionVisitor visitor) throws XPathException
simplify
??? Pattern
visitor
- an expression visitorXPathException
public Pattern analyze(ExpressionVisitor visitor, ItemType contextItemType) throws XPathException
analyze
??? Pattern
visitor
- an expression visitorcontextItemType
- the type of the context item at the point where the pattern appearsXPathException
public int getDependencies()
getDependencies
??? Pattern
public java.util.Iterator iterateSubExpressions()
iterateSubExpressions
??? Pattern
public boolean replaceSubExpression(Expression original, Expression replacement)
replaceSubExpression
???? Container
replaceSubExpression
??? Pattern
original
- the original subexpressionreplacement
- the replacement subexpressionpublic int allocateSlots(StaticContext env, SlotManager slotManager, int nextFree)
allocateSlots
??? Pattern
env
- the static context in the XSLT stylesheetslotManager
- nextFree
- the next slot that is free to be allocated @return the next slot that is free to be allocatedpublic void promote(PromotionOffer offer) throws XPathException
Unlike the corresponding method on Expression
, this method does not return anything:
it can make internal changes to the pattern, but cannot return a different pattern. Only certain
kinds of promotion are applicable within a pattern: specifically, promotions affecting local
variable references within the pattern.
promote
??? Pattern
offer
- details of the offer, for example the offer to move
expressions that don't depend on the context to an outer level in
the containing expressionXPathException
- if any error is detectedpublic boolean matches(NodeInfo node, XPathContext context) throws XPathException
matches
??? Pattern
node
- the node to be testedcontext
- The dynamic context. Only relevant if the pattern
uses variables, or contains calls on functions such as document() or key().XPathException
protected boolean internalMatches(NodeInfo node, XPathContext context) throws XPathException
internalMatches
??? Pattern
node
- The NodeInfo representing the Element or other node to be tested against the Patterncontext
- The dynamic context. Only relevant if the pattern
uses variables, or contains calls on functions such as document() or key().XPathException
public int getNodeKind()
getNodeKind
??? Pattern
public int getFingerprint()
getFingerprint
??? Pattern
public NodeTest getNodeTest()
getNodeTest
??? Pattern
public void resolveCurrent(LetExpression let, PromotionOffer offer, boolean topLevel) throws XPathException
let
- the expression that assigns the local variable. This returns a dummy result, and is executed
just before evaluating the pattern, to get the value of the context item into the variable.offer
- A PromotionOffer used to process the expressions and change the call on current() into
a variable referencetopLevel
- XPathException
public boolean equals(java.lang.Object other)
equals
??? java.lang.Object
other
- the other objectpublic int hashCode()
hashCode
??? java.lang.Object