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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.Available
This class supports the XSLT element-available and function-available functions.
| Field Summary | |
static int |
ELEMENT_AVAILABLE
|
static int |
FUNCTION_AVAILABLE
|
| 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 | |
Available()
|
|
| Method Summary | |
void |
checkArguments(StaticContext env)
Method called during static type checking |
Item |
evaluateItem(XPathContext context)
Run-time evaluation. |
Expression |
preEvaluate(StaticContext env)
preEvaluate: this method uses the static context to do early evaluation of the function if the argument is known |
| Methods inherited from class net.sf.saxon.functions.SystemFunction |
addContextDocumentArgument, 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 |
| Field Detail |
public static final int ELEMENT_AVAILABLE
public static final int FUNCTION_AVAILABLE
| Constructor Detail |
public Available()
| Method Detail |
public void checkArguments(StaticContext env)
throws XPathException
SystemFunction
checkArguments in class SystemFunctionXPathException
public Expression preEvaluate(StaticContext env)
throws XPathException
preEvaluate in class FunctionCallXPathException
public Item evaluateItem(XPathContext context)
throws XPathException
evaluateItem in interface ExpressionevaluateItem in class ComputedExpressioncontext - The context in which the expression is to be evaluated
XPathException - if any dynamic error occurs evaluating the
expression
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