Package net.sf.saxon.expr.flwor
Class LetClausePull
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- net.sf.saxon.expr.flwor.TuplePull
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- net.sf.saxon.expr.flwor.LetClausePull
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public class LetClausePull extends TuplePull
Implements the changes to a tuple stream effected by the Let clause in a FLWOR expression
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Constructor Summary
Constructors Constructor Description LetClausePull(TuplePull base, LetClause letClause)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidclose()Close the tuple stream, indicating that although not all tuples have been read, no further tuples are required and resources can be releasedbooleannextTuple(XPathContext context)Move on to the next tuple.
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Method Detail
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nextTuple
public boolean nextTuple(XPathContext context) throws XPathException
Move on to the next tuple. Before returning, this method must set all the variables corresponding to the "returned" tuple in the local stack frame associated with the context object- Specified by:
nextTuplein classTuplePull- Parameters:
context- the dynamic evaluation context- Returns:
- true if another tuple has been generated; false if the tuple stream is exhausted. If the method returns false, the values of the local variables corresponding to this tuple stream are undefined.
- Throws:
XPathException
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