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java.lang.Objectnet.sf.saxon.expr.ComputedExpression
net.sf.saxon.expr.FunctionCall
net.sf.saxon.functions.SystemFunction
net.sf.saxon.functions.Root
Implement the XPath 2.0 root() function
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 | |
Root()
|
Method Summary | |
int |
computeSpecialProperties()
Get the static properties of this expression (other than its type). |
Item |
evaluateItem(XPathContext c)
Evaluate in a general context |
SequenceIterator |
iterate(XPathContext c)
Return an Iterator to iterate over the values of a sequence. |
Expression |
simplify()
Simplify and validate. |
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, simplifyArguments |
Methods inherited from class net.sf.saxon.expr.ComputedExpression |
computeDependencies, computeStaticProperties, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getDependencies, getIntrinsicDependencies, getLineNumber, 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 Root()
Method Detail |
public Expression simplify() throws XPathException
simplify
in interface Expression
simplify
in class FunctionCall
XPathException
public int computeSpecialProperties()
computeSpecialProperties
in class ComputedExpression
public 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 SequenceIterator iterate(XPathContext c) throws XPathException
ComputedExpression
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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