com.saxonica.functions.extfn

Class LastModified

java.lang.Object

net.sf.saxon.lib.ExtensionFunctionDefinition

com.saxonica.functions.extfn.LastModified

public class LastModified
extends ExtensionFunctionDefinition

Extension function to determined the last-modified date of a file

Constructor Summary

Constructors

Constructor and Description
LastModified()

Method Summary

Methods

Modifier and Type	Method and Description
SequenceType[]	getArgumentTypes() Get the required types for the arguments of this function.
StructuredQName	getFunctionQName() Get the name of the function, as a QName.
int	getMaximumNumberOfArguments() Get the maximum number of arguments required by the function
int	getMinimumNumberOfArguments() Get the minimum number of arguments required by the function
SequenceType	getResultType(SequenceType[] suppliedArgumentTypes) Get the type of the result of the function
ExtensionFunctionCall	makeCallExpression() Create a call on this function.

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

LastModified

public LastModified()

Method Detail

getFunctionQName

public StructuredQName getFunctionQName()

Get the name of the function, as a QName.

This method must be implemented in all subclasses

Specified by:

getFunctionQName in class ExtensionFunctionDefinition

Returns:

the function name

getMinimumNumberOfArguments

public int getMinimumNumberOfArguments()

Get the minimum number of arguments required by the function

This method must be implemented in all subclasses

Overrides:

getMinimumNumberOfArguments in class ExtensionFunctionDefinition

Returns:

the minimum number of arguments that must be supplied in a call to this function

getMaximumNumberOfArguments

public int getMaximumNumberOfArguments()

Get the maximum number of arguments required by the function

This method must be implemented in all subclasses

Overrides:

getMaximumNumberOfArguments in class ExtensionFunctionDefinition

Returns:

the minimum number of arguments that must be supplied in a call to this function

getArgumentTypes

public SequenceType[] getArgumentTypes()

Get the required types for the arguments of this function.

This method must be implemented in all subtypes.

Specified by:

getArgumentTypes in class ExtensionFunctionDefinition

Returns:

the required types of the arguments, as defined by the function signature. Normally this should be an array of size getMaximumNumberOfArguments(); however for functions that allow a variable number of arguments, the array can be smaller than this, with the last entry in the array providing the required type for all the remaining arguments.

getResultType

public SequenceType getResultType(SequenceType[] suppliedArgumentTypes)

Get the type of the result of the function

This method must be implemented in all subtypes.

Specified by:

getResultType in class ExtensionFunctionDefinition

Parameters:

suppliedArgumentTypes - the static types of the supplied arguments to the function. This is provided so that a more precise result type can be returned in the common case where the type of the result depends on the types of the arguments.

Returns:

the return type of the function, as defined by its function signature

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