Package com.saxonica.ee.optim

This package contains classes used to support optimized expressions and instructions that are specific to Saxon-EE, and that don't fit conveniently into a more specialized category (such as streaming). They include the Saxon-EE optimiser; the code to implement multithreading in xsl:for-each in XSLT, and the code to perform optimized evaluation of general comparisons.

None of these classes will be used by typical user applications.

Class Summary

Class	Description
CommonSubexpressionPromoter	This class is responsible for identifying and extracting common subexpressions within an expression.
GeneralEqualityEE	This class provides an implementation of the GeneralComparison "=" operator, which deals efficiently with comparing two sequences.
GeneralEqualityEE.GeneralEqualityElaboratorEE	Elaborator for a general comparison expression such as (A = B).
GlobalExtractor	This class is responsible for extracting global variables from subexpressions within a function or template
IndexedFilterExpression	An IndexedFilterExpression contains a base expression and a filter predicate.
IndexedValue	A representation of a (sequence) value that allows the construction of one or more indexes to provide rapid access to the items in the sequence.
MultiIndex	A MultiIndex provides fast access to the items in a sequence.
MultiIndex.SelectedItemsIterator	Iterator over a subset of the items in this IndexedValue, identified by an IntSet holding the positions of the items in the selected subset (zero-based)
OptimizerEE	This class performs a number of optimizations that are specific to the Saxon-EE product.
QuickXPathParser	This class performs a quick parse of commonly encountered XPath expressions that conform to common syntactic patterns.
SearchableValue	A sequence that is held in a form that permits rapid searching, typically by use of indexes.
StaticQueryContextEE	A version of StaticQueryContext for Saxon-EE, that extends the capability by allowing compilation of library modules.
SwitchExpression	An optimized Choose expression in which all the branches are tests of the same expression for equality with some value.
SwitchExpression.SwitchCaseInfo	Data structure used for holding details of a switch expression
SwitchExpression.SwitchExprElaborator	Elaborator for a "Switch" expression (typically an xsl:choose that tests one expression against a list of constants: not exactly equivalent to an XQuery 3.1 switch expression).
XQueryExpressionEE	Saxon-EE version of XQueryExpression.