Package net.sf.saxon.functions

Class SubstringBefore.SubstringBeforeFnElaborator

java.lang.Object

net.sf.saxon.expr.elab.Elaborator

net.sf.saxon.expr.elab.StringElaborator

net.sf.saxon.functions.SubstringBefore.SubstringBeforeFnElaborator

Enclosing class:

SubstringBefore

public static class SubstringBefore.SubstringBeforeFnElaborator
extends StringElaborator

Constructor Summary

Constructors

Constructor	Description
SubstringBeforeFnElaborator()

Method Summary

Modifier and Type	Method	Description
StringEvaluator	elaborateForString(boolean zeroLengthWhenAbsent)	Get a function that evaluates the underlying expression in the form of a Java string, this being the result of applying fn:string() to the result of the expression.
UnicodeStringEvaluator	elaborateForUnicodeString(boolean zeroLengthWhenAbsent)	Get a function that evaluates the underlying expression in the form of a unicode string, this being the result of applying fn:string() to the result of the expression.

Methods inherited from class net.sf.saxon.expr.elab.StringElaborator

elaborateForBoolean, elaborateForItem, elaborateForPull, elaborateForPush, returnZeroLengthWhenAbsent

Methods inherited from class net.sf.saxon.expr.elab.Elaborator

eagerly, elaborateForUpdate, getConfiguration, getExpression, handleNullString, handleNullUnicodeString, handlePossiblyNullString, handlePossiblyNullUnicodeString, lazily, setExpression

Methods inherited from class java.lang.Object

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

Constructor Details

SubstringBeforeFnElaborator

public SubstringBeforeFnElaborator()

Method Details

elaborateForUnicodeString

public UnicodeStringEvaluator elaborateForUnicodeString(boolean zeroLengthWhenAbsent)

Description copied from class: Elaborator

Get a function that evaluates the underlying expression in the form of a unicode string, this being the result of applying fn:string() to the result of the expression.

Specified by:

elaborateForUnicodeString in class StringElaborator

Parameters:

zeroLengthWhenAbsent - if true, then when the result of the expression is an empty sequence, the result of the StringEvaluator should be a zero-length string. If false, the return value should be null. For an expression or function that never returns an empty sequence (for example, a call on string() or normalize-space()), the argument has no effect.

Returns:

an evaluator for the expression that returns a string.

elaborateForString

public StringEvaluator elaborateForString(boolean zeroLengthWhenAbsent)

Description copied from class: Elaborator

Get a function that evaluates the underlying expression in the form of a Java string, this being the result of applying fn:string() to the result of the expression.

Overrides:

elaborateForString in class Elaborator

Parameters:

zeroLengthWhenAbsent - if true, then when the result of the expression is an empty sequence, the result of the StringEvaluator should be a zero-length string. If false, the return value should be null.

Returns:

an evaluator for the expression that returns a string.