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java.lang.Object | +--net.sf.saxon.expr.ComputedExpression | +--net.sf.saxon.expr.FunctionCall | +--net.sf.saxon.functions.SystemFunction | +--net.sf.saxon.functions.CompileTimeFunction
Abtract class representing a function call that is always rewritten at compile-time: it can never be executed
Field Summary |
Fields inherited from class net.sf.saxon.functions.SystemFunction |
operation |
Fields inherited from class net.sf.saxon.expr.FunctionCall |
argument |
Fields inherited from class net.sf.saxon.expr.ComputedExpression |
locationId, staticProperties |
Fields inherited from interface net.sf.saxon.expr.Expression |
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD |
Constructor Summary | |
CompileTimeFunction()
|
Method Summary | |
Item |
evaluateItem(XPathContext c)
Evaluate as a single item |
SequenceIterator |
iterate(XPathContext c)
Iterate over the results of the function |
Expression |
preEvaluate(StaticContext env)
preEvaluate: this method suppresses compile-time evaluation by doing nothing. |
Methods inherited from class net.sf.saxon.functions.SystemFunction |
addContextDocumentArgument, checkArguments, computeCardinality, display, getDetails, getItemType, getRequiredType, main, makeSystemFunction, setDetails, useContextItemAsDefault |
Methods inherited from class net.sf.saxon.expr.FunctionCall |
analyze, checkArgumentCount, getDisplayName, getFunctionNameCode, getNumberOfArguments, iterateSubExpressions, promote, setArguments, setFunctionNameCode, simplify, simplifyArguments |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public CompileTimeFunction()
Method Detail |
public Expression preEvaluate(StaticContext env) throws XPathException
preEvaluate
in class FunctionCall
XPathException
public final Item evaluateItem(XPathContext c) throws XPathException
evaluateItem
in interface Expression
evaluateItem
in class ComputedExpression
c
- The context in which the expression is to be evaluated
XPathException
- if any dynamic error occurs evaluating the
expressionpublic final SequenceIterator iterate(XPathContext c) throws XPathException
iterate
in interface Expression
iterate
in class ComputedExpression
c
- supplies the context for evaluation
XPathException
- if any dynamic error occurs evaluating the
expression
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