com.saxonica.functions.extfn
Class Leading

java.lang.Object
  net.sf.saxon.lib.ExtensionFunctionDefinition
      com.saxonica.functions.extfn.GeneralFilterFunction
          com.saxonica.functions.extfn.Leading

All Implemented Interfaces:

Serializable

public class Leading
extends GeneralFilterFunction

This class implements the saxon:leading() extension functions.

The first argument is a sequence S, the second a function F (defaulting to fn:data). The function returns the item or items I in the input sequence S up to and excluding the first one for which F(I) returns false.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.saxonica.functions.extfn.GeneralFilterFunction

GeneralFilterFunction.GeneralFilterFunctionCall

Constructor Summary

Leading()

Method Summary

StructuredQName	getFunctionQName() Get the function name, as a QName
ExtensionFunctionCall	makeCallExpression() Create a call on this function.

Methods inherited from class com.saxonica.functions.extfn.GeneralFilterFunction

getArgumentTypes, getMaximumNumberOfArguments, getMinimumNumberOfArguments, getResultType

Methods inherited from class net.sf.saxon.lib.ExtensionFunctionDefinition

dependsOnFocus, hasSideEffects, trustResultType

Methods inherited from class java.lang.Object

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

Constructor Detail

Leading

public Leading()

Method Detail

getFunctionQName

public StructuredQName getFunctionQName()

Get the function name, as a QName

Specified by:

getFunctionQName in class ExtensionFunctionDefinition

Returns:

the QName of the function

makeCallExpression

public ExtensionFunctionCall makeCallExpression()

Create a call on this function. This method is called by the compiler when it identifies a function call that calls this function.

Specified by:

makeCallExpression in class ExtensionFunctionDefinition

Returns:

an expression representing a call of this extension function