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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.CollatingFunction
net.sf.saxon.functions.DistinctValues
public class DistinctValues
The XPath 2.0 distinct-values() function
Nested Class Summary | |
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static class |
DistinctValues.DistinctIterator
Iterator class to return the distinct values in a sequence |
Field Summary |
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Fields inherited from class net.sf.saxon.functions.CollatingFunction |
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conversionContext |
Fields inherited from class net.sf.saxon.functions.SystemFunction |
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operation |
Fields inherited from class net.sf.saxon.expr.FunctionCall |
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argument |
Fields inherited from class net.sf.saxon.expr.ComputedExpression |
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locationId, staticProperties |
Fields inherited from interface net.sf.saxon.expr.Expression |
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EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD |
Constructor Summary | |
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DistinctValues()
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Method Summary | |
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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. |
Methods inherited from class net.sf.saxon.functions.CollatingFunction |
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checkArguments, getAtomicComparer, getCollator, preEvaluateCollation |
Methods inherited from class net.sf.saxon.functions.SystemFunction |
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addContextDocumentArgument, computeCardinality, computeSpecialProperties, display, getDetails, getErrorCodeForTypeErrors, getItemType, getRequiredType, main, makeSystemFunction, setDetails, useContextItemAsDefault |
Methods inherited from class net.sf.saxon.expr.FunctionCall |
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checkArgumentCount, getDisplayName, getFunctionNameCode, getNumberOfArguments, iterateSubExpressions, optimize, preEvaluate, promote, setArguments, setFunctionNameCode, simplify, simplifyArguments, typeCheck |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public DistinctValues()
Method Detail |
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public 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
expressionprotected 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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