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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.CollatingFunction
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+--net.sf.saxon.functions.DistinctValues
The XPath 2.0 distinct-values() 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 |
locationId, staticProperties |
| Fields inherited from interface net.sf.saxon.expr.Expression |
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD |
| Constructor Summary | |
DistinctValues()
|
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| Method Summary | |
protected AtomicSortComparer |
getAtomicSortComparer(int arg,
XPathContext context)
Get a AtomicSortComparer that can be used to compare values |
SequenceIterator |
iterate(XPathContext context)
Evaluate the function to return an iteration of selected values or nodes. |
java.lang.Object |
map(Item item,
XPathContext context,
java.lang.Object info)
Mapping function. |
| Methods inherited from class net.sf.saxon.functions.CollatingFunction |
getAtomicComparer, getCollator, preEvaluate |
| 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 DistinctValues()
| Method Detail |
public SequenceIterator iterate(XPathContext context)
throws XPathException
iterate in interface Expressioniterate in class ComputedExpressioncontext - supplies the context for evaluation
XPathException - if any dynamic error occurs evaluating the
expression
public java.lang.Object map(Item item,
XPathContext context,
java.lang.Object info)
throws XPathException
map in interface MappingFunctionitem - The item to be mapped.
If context is supplied, this must be the same as context.currentItem().context - The processing context. This is supplied only for mapping constructs that
set the context node, position, and size. Otherwise it is null.info - Arbitrary information supplied by the creator of the MappingIterator. It must be
read-only and immutable for the duration of the iteration.
XPathException
protected AtomicSortComparer getAtomicSortComparer(int arg,
XPathContext context)
throws XPathException
arg - the position of the argument (starting at 0) containing the collation name.
If this argument was not supplied, the default collation is usedcontext - The dynamic evaluation context.
XPathException
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