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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.TreatFn
This class supports the XPath 2.0 functions exactly-one(), one-or-more(), zero-or-one(). Because Saxon doesn't do strict static type checking, these are essentially identity functions; the run-time type checking is done as part of the function call mechanism
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 |
lineNumber, NO_ARGUMENTS, staticProperties |
Constructor Summary | |
TreatFn()
|
Method Summary | |
Item |
evaluateItem(XPathContext context)
Evaluate the function |
SequenceIterator |
iterate(XPathContext context)
Iterate over the results of the function |
Methods inherited from class net.sf.saxon.functions.SystemFunction |
addContextDocumentArgument, checkArguments, computeCardinality, display, getDetails, getItemType, getName, getRequiredType, main, makeSystemFunction, useContextItemAsDefault |
Methods inherited from class net.sf.saxon.expr.FunctionCall |
analyze, checkArgumentCount, getNumberOfArguments, getSubExpressions, preEvaluate, promote, setArguments, simplify, simplifyArguments |
Methods inherited from class net.sf.saxon.expr.ComputedExpression |
computeDependencies, computeSpecialProperties, computeStaticProperties, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getDependencies, getIntrinsicDependencies, getLineNumber, getSourceLocator, getSpecialProperties, markTailFunctionCalls, setLineNumber, typeError |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public TreatFn()
Method Detail |
public Item evaluateItem(XPathContext context) throws XPathException
evaluateItem
in interface Expression
evaluateItem
in class ComputedExpression
context
- The context in which the expression is to be evaluated
XPathException
- if any dynamic error occurs evaluating the
expressionpublic SequenceIterator iterate(XPathContext context) throws XPathException
iterate
in interface Expression
iterate
in class ComputedExpression
context
- supplies the context for evaluation
XPathException
- if any dynamic error occurs evaluating the
expression
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