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.
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.
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".
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".
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".
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".
setSortKey
public void setSortKey(Expression exp)
Set the expression used as the sort key
setStaticContext
public void setStaticContext(StaticContext sc)
Set the static context. This is used only for resolving any QName supplied in the data-type
property.