: Class SortKeyDefinition

com.icl.saxon.sort
Class SortKeyDefinition

java.lang.Object

  |

  +--com.icl.saxon.sort.SortKeyDefinition

public class SortKeyDefinition

extends java.lang.Object

A SortKeyDefinition defines one component of a sort key.
Note that most attributes defining the sort key can be attribute value templates, and can therefore vary from one invocation to another. We hold them as expressions, but optimise for the case where the attributes are all fixed strings: in this case we can use the same Comparer object each time.

Constructor Summary

SortKeyDefinition()

Method Summary

void	bindComparer() If possible, use the same comparer every time
Expression	getCaseOrder()
Comparer	getComparer(Context context) Get a Comparer which can be used to compare two values according to this sort key.
Expression	getDataType()
Expression	getLanguage()
Expression	getOrder()
Expression	getSortKey()
void	setCaseOrder(Expression exp) Set the case order.
void	setDataType(Expression exp) Set the data type.
void	setLanguage(Expression exp) Set the language.
void	setOrder(Expression exp) Set the order.
void	setSortKey(Expression exp) Set the expression used as the sort key
void	setStaticContext(StaticContext sc) Set the static context.

Methods inherited from class java.lang.Object

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

Constructor Detail

SortKeyDefinition

public SortKeyDefinition()

Method Detail

setSortKey

public void setSortKey(Expression exp)

Set the expression used as the sort key

setOrder

public void setOrder(Expression exp)

Set the order. This is supplied as an expression which must evaluate to "ascending" or "descending". If the order is fixed, supply e.g. new StringValue("ascending"). Default is "ascending".

setDataType

public void setDataType(Expression exp)

Set the data type. This is supplied as an expression which must evaluate to "text", "number", or a QName. If the data type is fixed, supply e.g. new StringValue("text"). Default is "text".

setCaseOrder

public void setCaseOrder(Expression exp)

Set the case order. This is supplied as an expression which must evaluate to "upper-first" or "lower-first" or "#default". If the order is fixed, supply e.g. new StringValue("lower-first"). Default is "#default".

setLanguage

public void setLanguage(Expression exp)

Set the language. This is supplied as an expression which evaluate to the language name. If the order is fixed, supply e.g. new StringValue("de"). Default is "en".

setStaticContext

public void setStaticContext(StaticContext sc)

Set the static context. This is used only for resolving any QName supplied in the data-type property.

getSortKey

public Expression getSortKey()

getOrder

public Expression getOrder()

getDataType

public Expression getDataType()

getCaseOrder

public Expression getCaseOrder()

getLanguage

public Expression getLanguage()

bindComparer

public void bindComparer()
                  throws XPathException

If possible, use the same comparer every time

getComparer

public Comparer getComparer(Context context)
                     throws XPathException

Get a Comparer which can be used to compare two values according to this sort key.