net.sf.saxon.pattern
public final class IDPattern extends Pattern
Constructor Summary | |
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IDPattern(Expression id)
Create an id pattern. |
Method Summary | |
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int | allocateSlots(StaticContext env, SlotManager slotManager, int nextFree)
Allocate slots to any variables used within the pattern |
Pattern | analyze(ExpressionVisitor visitor, ItemType contextItemType)
Type-check the pattern.
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boolean | equals(Object other)
Determine whether this pattern is the same as another pattern |
int | getDependencies()
Get the dependencies of the pattern. |
int | getNodeKind()
Determine the type of nodes to which this pattern applies. |
NodeTest | getNodeTest()
Get a NodeTest that all the nodes matching this pattern must satisfy |
int | hashCode()
Hashcode supporting equals() |
Iterator | iterateSubExpressions()
Iterate over the subexpressions within this pattern |
boolean | matches(NodeInfo e, XPathContext context)
Determine whether this Pattern matches the given Node |
void | promote(PromotionOffer offer, Expression parent)
Offer promotion for subexpressions within this pattern. |
boolean | replaceSubExpression(Expression original, Expression replacement)
Replace a subexpression by a replacement subexpression |
Parameters: id Either a StringValue or a VariableReference
Parameters: env the static context in the XSLT stylesheet slotManager the slot manager representing the stack frame for local variables nextFree the next slot that is free to be allocated @return the next slot that is free to be allocated
Returns: the optimised Pattern
Parameters: other the other object
Returns: Type.ELEMENT
Parameters: e The NodeInfo representing the Element or other node to be tested against the Pattern
Returns: true if the node matches the Pattern, false otherwise
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.
Parameters: 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 expression parent
Throws: net.sf.saxon.trans.XPathException if any error is detected
Parameters: original the expression to be replaced replacement the new expression to be inserted in its place
Returns: true if the replacement was carried out