net.sf.saxon.sort

Class FixedSortKeyDefinition

java.lang.Object

net.sf.saxon.sort.SortKeyDefinition

net.sf.saxon.sort.FixedSortKeyDefinition

All Implemented Interfaces:

Serializable

public final class FixedSortKeyDefinition
extends SortKeyDefinition

A FixedSortKeyDefinition is a SortKeyDefinition in which all aspects of the sort key definition (sort order, data type, etc,) are known. A SortKeyDefinition defines one component of a sort key.

See Also:

Serialized Form

Field Summary

Fields inherited from class net.sf.saxon.sort.SortKeyDefinition

baseURI, caseOrder, collation, collationName, dataTypeExpression, emptyLeast, language, order, parentExpression, sortKey

Constructor Summary

Constructors

Constructor and Description
FixedSortKeyDefinition()

Method Summary

Modifier and Type	Method and Description
void	bindComparer(XPathContext context) Allocate a reusable Comparer to implement this sort key comparison
Comparator	getComparer() Get the comparer which is used to compare two values according to this sort key.
FixedSortKeyDefinition	reduce(XPathContext context) Eliminate dependencies of the sort key definition on the context.
SortKeyDefinition	simplify()

Methods inherited from class net.sf.saxon.sort.SortKeyDefinition

getBaseURI, getCaseOrder, getCollation, getCollationName, getDataTypeExpression, getEmptyLeast, getLanguage, getOrder, getParentExpression, getSortKey, setBaseURI, setCaseOrder, setCollation, setCollationName, setDataTypeExpression, setEmptyLeast, setLanguage, setOrder, setParentExpression, setSortKey, simplify

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FixedSortKeyDefinition

public FixedSortKeyDefinition()

Method Detail

simplify

public SortKeyDefinition simplify()

reduce

public FixedSortKeyDefinition reduce(XPathContext context)

Eliminate dependencies of the sort key definition on the context. For the sort key select expression, this means things that don't depend on the individual node: specifically, variables and current-group(). For the AVTs used to select data type, case order, language, it means all dependencies: after reduction, these values will be constants.

Overrides:

reduce in class SortKeyDefinition

bindComparer

public void bindComparer(XPathContext context)
                  throws XPathException

Allocate a reusable Comparer to implement this sort key comparison

Throws:

XPathException

getComparer

public Comparator getComparer()

Get the comparer which is used to compare two values according to this sort key.