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java.lang.Object
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+--net.sf.saxon.expr.ComputedExpression
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+--net.sf.saxon.expr.FunctionCall
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+--net.sf.saxon.functions.SystemFunction
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+--net.sf.saxon.functions.StringFn
Implement XPath function string()
| 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 | |
StringFn()
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| Method Summary | |
Expression |
analyze(StaticContext env,
ItemType contextItemType)
Type check. |
Item |
evaluateItem(XPathContext c)
Evaluate the function |
Expression |
simplify(StaticContext env)
Simplify and validate. |
| 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 |
checkArgumentCount, getDisplayName, getFunctionNameCode, getNumberOfArguments, iterateSubExpressions, preEvaluate, promote, setArguments, setFunctionNameCode, simplifyArguments |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
public StringFn()
| Method Detail |
public Expression simplify(StaticContext env)
throws XPathException
simplify in interface Expressionsimplify in class FunctionCallXPathException - if an error is discovered during expression
rewriting
public Expression analyze(StaticContext env,
ItemType contextItemType)
throws XPathException
analyze in interface Expressionanalyze in class FunctionCallenv - the static context of the expressioncontextItemType - the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPE
XPathException
public Item evaluateItem(XPathContext c)
throws XPathException
evaluateItem in interface ExpressionevaluateItem in class ComputedExpressionc - The context in which the expression is to be evaluated
XPathException - if any dynamic error occurs evaluating the
expression
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